JP2015197724A - Gesture detection apparatus, operation method thereof, and control program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technology of detecting gestures through simple processing with high accuracy.SOLUTION: A gesture detection apparatus 1 includes: a table holding section 12 which holds a first table for holding information on a first coordinate value indicating a position of a detection object 60 in a first coordinate axis, and a second table for holding information on a second coordinate value indicating a position of the detection object 60 in a second coordinate axis perpendicular to the first coordinate axis; a table updating section 11 which updates information on the first coordinate value in the first table, on the basis of the first coordinate values sequentially input, and updates information on the second coordinate value in the second table, on the basis of the second coordinate values sequentially input; and a gesture detection section 13 which detects a motion pattern of the detection object 60, on the basis of the first and second tables.

Description

  The present invention relates to a gesture detection device.

  As described in Patent Documents 1 to 3, techniques for detecting a motion pattern (gesture) of a detection target have been proposed.

Japanese Patent No. 3637226 Japanese Patent No. 5116754 JP 2012-123617 A

  As for the gesture detection device, it is desired to detect a gesture with high accuracy by simple processing.

  Accordingly, the present invention has been made in view of the above-described points, and an object of the present invention is to provide a technique that can accurately detect a gesture with simple processing.

  In order to solve the above-described problem, an aspect of the gesture detection device according to the present invention includes a number of times that the first coordinate value indicating the position of the detection target on the first coordinate axis continuously changes in the same direction, and the first At least one of the accumulated values of the change amount of the first coordinate value when the coordinate value continuously changes in the same direction, and the first when the first coordinate value continuously changes in the same direction. The first table that holds information about the first coordinate value including the change direction of the coordinate value is the same as the second coordinate value indicating the position of the detection object on the second coordinate axis perpendicular to the first coordinate axis. At least one of the number of continuous changes in the direction and the cumulative value of the change amount of the second coordinate value when the second coordinate value continuously changes in the same direction; and the second coordinate value is Change of the second coordinate value when continuously changing in the same direction A table holding unit that holds a second table that holds information about the second coordinate value including a direction, and the first coordinate value in the first table based on the first coordinate value that is sequentially input A table updating unit for updating information on the second coordinate value in the second table based on the second coordinate value sequentially input, and on the basis of the first and second tables, A gesture detection unit that detects a movement pattern of the detection object.

  In one aspect of the gesture detection apparatus according to the present invention, the gesture detection unit performs a first operation in which the detection target rotates on a coordinate plane specified by the first and second coordinate axes. And a motion detection unit that detects based on the second table, wherein the gesture detection unit uses the first motion detected by the motion detection unit as the motion pattern, and the motion detection unit stores the motion detection unit in the first table. Based on the first movement direction of the detection object along the plus direction of the first coordinate axis and the second movement direction of the detection object along the minus direction of the first coordinate axis, Based on two tables, a third movement direction of the detection object along the plus direction of the second coordinate axis and a fourth movement direction of the detection object along the minus direction of the second coordinate axis are specified. And a determination unit that determines that the detection target is performing the first operation when the order in which the movement direction of the detection target is specified in the movement direction specification unit indicates a predetermined order. And have.

  Moreover, in one aspect of the gesture detection apparatus according to the present invention, the determination unit holds, as history information, the order in which the movement direction of the detection target is specified by the movement direction specification unit, and based on the history information. Determining whether the order in which the moving directions are specified in the moving direction specifying unit indicates the predetermined order, and when the moving direction is specified in the moving direction specifying unit, the moving direction and the history information are When the combination with the order in which the movement direction of the detection target is specified in the movement direction specifying unit is included in a portion starting from the top of the predetermined order, the history information is updated, and the combination is The history information is cleared when it is not included in the part starting from the top in the predetermined order.

  Moreover, in one aspect of the gesture detection apparatus according to the present invention, the determination unit includes the order in which the movement direction of the detection target is specified by the movement direction specification unit in a plurality of types of orders including the predetermined order. When it is determined that the detection target is performing the first operation.

  In the aspect of the gesture detection device according to the present invention, the first operation includes a first rotation operation in which the detection target object rotates in the first direction on the coordinate plane, and the detection on the coordinate plane. A second rotation operation in which the object rotates in a second direction opposite to the first direction, and the determination unit has an order in which the movement direction of the detection object is specified by the movement direction specifying unit. When the first predetermined order is indicated, it is determined that the detection object is performing the first rotation operation, and the order in which the movement direction of the detection object is specified by the movement direction specifying unit is the first predetermined order. When the second predetermined order different from the order is indicated, it is determined that the detection target object is performing the second rotation operation.

  Moreover, in one aspect of the gesture detection apparatus according to the present invention, the determination unit holds, as history information, the order in which the movement direction of the detection target is specified by the movement direction specification unit, and based on the history information. Determining whether the order in which the moving direction is specified in the moving direction specifying unit indicates the first or second predetermined order, and when the moving direction is specified in the moving direction specifying unit, The combination of the moving direction and the order in which the moving direction of the detection target is specified in the moving direction specifying unit indicated by the history information is a portion starting from the top of the first predetermined order and the second predetermined order. If it is included in any of the parts starting from the beginning, the history information is updated, and the combination starts from the beginning of the first predetermined order and the second If not included in any of the parts that start from the beginning of the constant sequence clears the history information.

  Further, in one aspect of the gesture detection apparatus according to the present invention, the determination unit includes a plurality of types of first orders in which the movement direction specifying unit specifies the movement direction of the detection target object including the first predetermined order. When the detection target is included in one order, it is determined that the detection target is performing the first rotation operation, and the order in which the movement direction of the detection target is specified in the movement direction specifying unit is the second predetermined value. When included in a plurality of types of second orders including the order, it is determined that the detection target object is performing the second rotation operation.

  Further, in one aspect of the gesture detection apparatus according to the present invention, the motion detection unit detects a second motion of the detection target moving along the first coordinate axis based on the first table, and detects the gesture. When the motion detection unit detects both the first and second motions, the first motion is used as the motion pattern, the motion detection unit detects the second motion, and the first motion When the second motion is not detected, the second motion is set as the motion pattern.

  In the aspect of the gesture detection apparatus according to the present invention, the table holding unit may have a third coordinate value indicating a position of the detection target on a third coordinate axis perpendicular to the first and second coordinate axes in the same direction. The third coordinate value is the same as at least one of the number of times the third coordinate value continuously changes and the cumulative value of the change amount of the third coordinate value when the third coordinate value continuously changes in the same direction. A third table that holds information about the third coordinate value, including a change direction of the third coordinate value when the direction continuously changes, and the table update unit sequentially inputs the first table Information on the third coordinate value in the third table is updated based on the three coordinate values, and the motion detection unit performs a second motion of the detection target object along the third coordinate axis in the third table. Detect based on the gesture The detection unit detects the first motion as the motion pattern when the motion detection unit detects both the first and second motions, the motion detection unit detects the second motion, and the first motion; When one motion is not detected, the second motion is set as the motion pattern.

  Further, in one aspect of the gesture detection apparatus according to the present invention, the motion detection unit causes the first table to perform a third motion in which the detection target moves alternately in the plus direction and the minus direction along the first coordinate axis. The gesture detection unit detects the third motion as the motion pattern when the motion detection unit detects the third motion.

  Further, in one aspect of the gesture detection apparatus according to the present invention, the table holding unit has a third coordinate value indicating a position of the detection object on a third coordinate axis perpendicular to the first and second coordinate axes in the same direction. The third coordinate value is in the same direction as at least one of the number of times of continuous change and the cumulative value of the amount of change in the third coordinate value when the third coordinate value continuously changes in the same direction. And a third table that holds information about the third coordinate value, including a change direction of the third coordinate value when continuously changing, and the table updating unit sequentially inputs the third table Information on the third coordinate value in the third table is updated based on the coordinate value, and the motion detection unit is configured to move the detection target alternately in the plus direction and the minus direction along the third coordinate axis. 3 movements in the third table It detected based on Le, the gesture detection unit, when the operation detecting section detects the third operation, the third operation and the motion pattern.

  In one aspect of the gesture detection apparatus according to the present invention, the first and second coordinate values are output from a position detection apparatus that detects a position of the detection target and has a detection surface parallel to the coordinate plane. The position detection device outputs a third coordinate value indicating a position of the detection object on a third coordinate axis perpendicular to the first and second coordinate axes, and the motion detection unit is along the first coordinate axis. Detecting a second motion of the detection target based on the first table, and detecting whether or not the detection target exists based on the third coordinate value; The gesture detection unit further includes the first motion as the motion pattern when the motion detection unit detects both the first and second motions, and the determination unit does not hold history information. And by the motion detector When the second motion is detected, the second motion is used as a motion pattern, and the determination unit retains the history information when the detection target presence / absence specifying unit specifies that the detection target exists. And when the second motion is detected by the motion detection unit, the second motion is not used as the motion pattern, and the detection target presence / absence specifying unit specifies that the detection target does not exist When the determination unit holds the history information and the first operation is not detected by the operation detection unit and the second operation is detected, the second operation is set as the motion pattern.

  In one aspect of the gesture detection apparatus according to the present invention, the first and second coordinate values are detected from a position of the detection target and output from a position detection apparatus having a detection surface perpendicular to the first coordinate axis. The motion detection unit detects a second motion of the detection target moving along the first coordinate axis based on the first table, and the detection target exists based on the first coordinate value. A detection target presence / absence specifying unit that specifies whether the motion detection unit detects both the first and second motions, and the gesture detection unit uses the first motion as the motion pattern. When the determination unit does not hold history information and the second motion is detected by the motion detection unit, the second motion is used as a motion pattern, and the detection target presence / absence specifying unit performs the detection. When it is specified that an object exists, when the determination unit holds the history information and the second motion is detected by the motion detection unit, the second motion is not used as the motion pattern, When the detection object presence / absence specifying unit specifies that the detection object does not exist, the determination unit holds the history information, and the operation detection unit does not detect the first operation and the second operation is not performed. When the motion is detected, the second motion is set as the motion pattern.

  In one aspect of the gesture detection apparatus according to the present invention, the first and second coordinate values are output from a position detection apparatus that detects a position of the detection target and has a detection surface parallel to the coordinate plane. The position detection device outputs a third coordinate value indicating a position of the detection object on a third coordinate axis perpendicular to the first and second coordinate axes, and the table holding unit has the third coordinate value At least one of the number of times of continuous change in the same direction, the cumulative value of the amount of change of the third coordinate value when the third coordinate value continuously changes in the same direction, and the third coordinate value And a third table that holds information about the third coordinate value, including a change direction of the third coordinate value when the values continuously change in the same direction, and the table update unit includes the position detection device. Are sequentially output based on the third coordinate values. The information on the third coordinate value in the third table is updated, and the motion detection unit detects a second motion of the detection target moving along the third coordinate axis based on the third table. A detection target presence / absence specifying unit that specifies whether or not the detection target exists based on the third coordinate value, wherein the gesture detection unit includes the first and second movements. When both are detected, the first motion is set as the motion pattern, and when the determination unit does not hold history information and the second motion is detected by the motion detection unit, the second motion is detected. When the motion is a movement pattern, and the detection target presence / absence specifying unit specifies that the detection target exists, the determination unit holds the history information, and the motion detection unit When a motion is detected, the determination unit holds the history information when the second motion is not used as the motion pattern and the detection target presence / absence specifying unit specifies that the detection target does not exist. When the first motion is not detected by the motion detector and the second motion is detected, the second motion is set as the motion pattern.

  In one aspect of the gesture detection apparatus according to the present invention, the first and second coordinate values are detected from a position of the detection target and output from a position detection apparatus having a detection surface perpendicular to the first coordinate axis. The position detecting device outputs a third coordinate value indicating a position of the detection object on a third coordinate axis perpendicular to the first and second coordinate axes, and the table holding unit is configured to output the third coordinate value. At least one of the number of times the second coordinate continuously changes in the same direction, and the cumulative value of the amount of change in the third coordinate value when the third coordinate value continuously changes in the same direction, and the third coordinate A third table that holds information about the third coordinate value, including a change direction of the third coordinate value when the value continuously changes in the same direction, and the table update unit is configured to detect the position Based on the third coordinate value sequentially output by the device. And updating the information related to the third coordinate value in the third table, and the motion detection unit detects a second motion of the detection target moving along the third coordinate axis based on the third table. , Further comprising a detection object presence / absence specifying unit for specifying whether or not the detection object exists based on the first coordinate value, wherein the gesture detection unit includes the first and second motion detection units. When both of the motions are detected, the first motion is set as the motion pattern, and when the determination unit does not hold history information and the second motion is detected by the motion detection unit, the first motion is detected. In the case where it is specified that the detection target exists by the detection target presence / absence specifying unit, the determination unit holds the history information, and the motion detection unit When the second motion is detected, the determination unit does not use the second motion as the motion pattern and the determination unit determines that the detection target is not present by the detection target presence / absence specifying unit. And when the first motion is not detected by the motion detector and the second motion is detected, the second motion is set as the motion pattern.

  In the aspect of the gesture detection device according to the present invention, when the first coordinate value is input, the table update unit is configured to input the first coordinate input this time with respect to the first coordinate value input last time. The direction of change in value is different from the change direction held in the first table, and the difference between the first coordinate value input last time and the first coordinate value input this time is smaller than a threshold value. Does not update the first table.

  Further, in one aspect of the gesture detection device according to the present invention, each time three of the first coordinate values are input to the gesture detection device, the central one of the three input first coordinate values. An output unit is further provided for outputting the coordinate value to the table update unit.

  Further, in one aspect of the operation method of the gesture detection apparatus according to the present invention, a first table that holds information about the first coordinate value indicating the position of the detection target object on the first coordinate axis, and a perpendicular to the first coordinate axis. An operation method of a gesture detection apparatus that holds a second table that holds information about a second coordinate value indicating a position of the detection target object on a second coordinate axis, the first coordinate value in the first table The information on the number of times the first coordinate value continuously changes in the same direction and the accumulated value of the change amount of the first coordinate value when the first coordinate value continuously changes in the same direction. And the change direction of the first coordinate value when the first coordinate value continuously changes in the same direction, and the information regarding the second coordinate value in the second table is the first Two coordinate values in the same direction The second coordinate value is in the same direction as at least one of the number of times that the second coordinate value continuously changes and at least one of the accumulated values of the amount of change in the second coordinate value when the second coordinate value continuously changes in the same direction. And (a) the first coordinates in the first table based on the first coordinate values sequentially input to the gesture detecting device. Updating the information on the value, and updating the information on the second coordinate value in the second table based on the second coordinate value sequentially input to the gesture detecting device; and (b) the step (a And a step of detecting a movement pattern of the detection object based on the first and second tables updated in step (1).

  One aspect of the control program according to the present invention includes a first table that holds information about the first coordinate value indicating the position of the detection target on the first coordinate axis, and a second coordinate axis that is perpendicular to the first coordinate axis. A control program for controlling a gesture detection apparatus that holds a second table that holds information relating to a second coordinate value indicating the position of the detection object, the first coordinate value in the first table The information on the number of times the first coordinate value continuously changes in the same direction and the accumulated value of the change amount of the first coordinate value when the first coordinate value continuously changes in the same direction. And the change direction of the first coordinate value when the first coordinate value continuously changes in the same direction, and the information regarding the second coordinate value in the second table is the first Two coordinate values are in the same direction The second coordinate value is in the same direction as at least one of the number of times of continuous change and the cumulative value of the amount of change in the second coordinate value when the second coordinate value continuously changes in the same direction. The first coordinate table based on the first coordinate values sequentially input to the gesture detection device. Updating information related to the first coordinate value in the second table, and updating information related to the second coordinate value in the second table based on the second coordinate value sequentially input to the gesture detecting device; b) Based on the first and second tables updated in the step (a), the step of detecting the movement pattern of the detection object is executed.

  According to the present invention, it is possible to accurately detect a gesture with simple processing.

It is a figure which shows the position detection apparatus and gesture detection apparatus which concern on embodiment. It is a figure for demonstrating operation | movement of a gesture detection system. It is a block diagram which shows the electrical structure of the gesture detection apparatus which concerns on embodiment. It is a figure which shows the functional structure of the control part which concerns on 1st embodiment. It is a figure for demonstrating a 1st operation | movement. It is a figure for demonstrating 2nd operation | movement. It is a figure for demonstrating 3rd operation | movement. It is a figure for demonstrating operation | movement of the control part which concerns on 1st embodiment. It is a figure for demonstrating the information hold | maintained at a table. It is a figure for demonstrating the process of the table update part which concerns on 1st embodiment. It is a figure which shows an example of a 1st table. It is a figure for demonstrating the process of the table update part which concerns on 1st embodiment. It is a figure for demonstrating the process of the table update part which concerns on 1st embodiment. It is a figure which shows the structure of the 1st operation | movement detection part which concerns on 1st embodiment. It is a figure for demonstrating the process in the 1st operation | movement detection part which concerns on 1st embodiment. It is a figure which shows an example when a detection target object performs 1st operation | movement on xy coordinate plane. It is a figure which shows the x coordinate value and y coordinate value which were detected with the position detection apparatus. It is a figure which shows the x coordinate value detected by the position detection apparatus. It is a figure which shows an example of a 1st table. It is a figure for demonstrating the process in the movement direction specific | specification part which concerns on 1st embodiment. It is a figure for demonstrating the process in the movement direction specific | specification part which concerns on 1st embodiment. It is a figure which shows an example of log | history information. It is a figure which shows the list | wrist of a predetermined order. It is a figure which shows an example of operation | movement of a detection target object on xy coordinate plane. It is a figure for demonstrating an example of log | history information. It is a figure for demonstrating the process in the 1st determination part which concerns on 1st embodiment. It is a figure for demonstrating the process in the 1st determination part which concerns on 1st embodiment. It is a figure for demonstrating the process in the 1st determination part which concerns on 1st embodiment. It is a figure for demonstrating the process in the 2nd operation | movement detection part which concerns on 1st embodiment. It is a figure which shows the structure of the 3rd operation | movement detection part which concerns on 1st embodiment. It is a figure which shows the x coordinate value detected by the position detection apparatus. It is a figure for demonstrating the process in the 3rd operation | movement detection part which concerns on 1st embodiment. It is a figure for demonstrating the process in the specific part which concerns on 1st embodiment. It is a figure which shows the functional structure of the control part which concerns on the modification of 1st embodiment. It is a figure for demonstrating the process in the control part which concerns on the modification of 1st embodiment. It is a figure which shows the functional structure of the control part which concerns on 2nd embodiment. It is a figure for demonstrating the process in the control part which concerns on the modification of 2nd embodiment. It is a figure which shows the functional structure of the control part which concerns on 2nd embodiment. It is a figure for demonstrating the process in the control part which concerns on the modification of 2nd embodiment. It is a figure for demonstrating the process in the table update part which concerns on 3rd embodiment. It is a figure which shows the functional structure of the control part which concerns on 4th embodiment. It is a figure for demonstrating the process in the control part which concerns on 4th embodiment.

<< 1. About gesture detection device >>
FIG. 1 is a diagram illustrating an example of the appearance of the position detection device 100 and the gesture detection device 1. The position detection device 100 detects the position of the detection target 60 such as a human hand or finger. The position detection device 100 has a substantially rectangular parallelepiped shape. The length of the longest side of the position detection device 100 is, for example, about 10 mm, but in FIG. 1, the position detection device 100 is shown in a size larger than the actual size for convenience. The position detection apparatus 100 according to the present embodiment is provided with a window that transmits light, and includes an illumination unit 101 and a light receiving unit 102 inside the window. In the present embodiment, the case where the position detection device 100 optically detects the detection target 60 will be described as an example. For example, the position of the detection target 60 is detected using ultrasonic waves or the like. It may be a thing.

  Based on the position of the detection target 60 input from the position detection apparatus 100 every moment, the gesture detection device 1 moves the movement pattern of the detection target 60 (hereinafter, the movement pattern of the detection target 60 is referred to as “gesture”). May be called). As illustrated in FIG. 1, the gesture detection device 1 may be formed integrally with the position detection device 100, or may be formed separately from the position detection device 100. Further, unlike the example shown in FIG. 1, the gesture detection device 1 may be configured by a personal computer (PC).

  In the present embodiment, the position detection device 100 and the gesture detection device 1 function as a gesture detection system 110 that detects the gesture of the detection target 60 in a non-contact manner. The gesture detection system 110 can be used as an input device that can input an instruction by a gesture. The shapes of the position detection device 100 and the gesture detection device 1 shown in FIG. 1 are examples, and are not limited to the shapes shown in FIG.

  Next, a schematic operation of the gesture detection system 110 will be described with reference to FIGS. FIG. 2 is a diagram for explaining the operation of the gesture detection system 110. The process of step S100 shown in FIG. 2 is a process performed by the position detection device 100, and the process of step S104 is a process performed by the gesture detection device 1.

  First, the light 61 is emitted from the illumination unit 101 (step S101 in FIG. 2), and the light 61 emitted from the illumination unit 101 is reflected by the detection target 60 to become reflected light 62 (step S102 in FIG. 2). Then, based on the reflected light 62 in step S102 received by the light receiving surface of the light receiving unit 102, the position detection device 100 obtains the position of the detection target 60. As shown in FIG. 1, the position of the detection target 60 obtained by the position detection device 100 is a coordinate value indicating the position of the detection target 60 in the xyz orthogonal coordinate system including the x-axis, the y-axis, and the z-axis. It is.

  Hereinafter, unless otherwise specified, simply saying “x coordinate value” means a value indicating the position of the detection target 60 on the x axis detected by the position detection device 100. Further, simply speaking, “y coordinate value” means a value indicating the position of the detection target 60 on the y axis detected by the position detection device 100. Further, simply speaking “z coordinate value” means a value indicating the position of the detection target 60 on the z axis detected by the position detection device 100. In the present embodiment, a case where the light receiving surface of the light receiving unit 102 is included in the xy coordinate plane will be described as an example. The origin of the xy coordinate plane is the center position of the light receiving surface of the light receiving unit 102, and the axis in the direction perpendicular to the xy coordinate plane is the z axis. Then, the gesture detection device 1 detects the gesture of the detection target 60 based on the x coordinate value, the y coordinate value, and the z coordinate value detected in step S100 (step S104).

  In the following first to fourth embodiments, the gesture detection device 1 that detects a gesture of the detection target 60 based on the x coordinate value, the y coordinate value, and the z coordinate value detected by the position detection device 100 will be described in detail. explain. In the first to fourth embodiments, a case where three types of coordinate values, that is, an x coordinate value, a y coordinate value, and a z coordinate value are input to the gesture detection device 1 will be described as an example. However, the coordinate value input to the gesture detection apparatus 1 may be one type or two types.

<< 2. First embodiment >>
<2-1. Electrical configuration>
FIG. 3 is a block diagram illustrating an electrical configuration of the gesture detection apparatus 1. The gesture detection device 1 is configured by, for example, a microcontroller (microcomputer) that is a kind of LSI (Large Scale Integration).

  As shown in FIG. 3, the gesture detection device 1 includes a control unit 10 having a CPU (Central Processing Unit) 10a, a storage unit 10b, and the like. Various functions concerning the control unit 10 are realized by the CPU 10a executing the control program 10c stored in the storage unit 10b. The storage unit 10b includes a non-transitory recording medium that can be read by the CPU 10a, such as a ROM (Read Only Memory) and a RAM (Random Access Memory). The storage unit 10b may include a computer-readable non-transitory recording medium other than the ROM and RAM. Further, as shown in FIG. 3, a position detection device 100 is connected to the control unit 10.

<2-2. About functional blocks>
<2-2-1. About the control unit>
In the control unit 10, a plurality of functional blocks are formed by executing the control program 10c. FIG. 4 is a diagram illustrating a part of a plurality of functional blocks formed in the control unit 10. As shown in FIG. 4, the control unit 10 includes a table update unit 11, a table holding unit 12, and a gesture detection unit 13. The gesture detection unit 13 includes a motion detection unit 14 having a first motion detection unit 16, a second motion detection unit 17, and a third motion detection unit 18, and a specifying unit 15.

  The table holding unit 12 holds at least one of a table that holds information about x coordinate values, a table that holds information about y coordinate values, and a table that holds information about z coordinate values. .

  In the present embodiment, for the sake of convenience, a table that holds information related to x coordinate values is referred to as a “first table”. A table holding information regarding the y coordinate value is referred to as a “second table”. A table holding information regarding the z coordinate value is referred to as a “third table”. Further, when it is not necessary to distinguish the first table, the second table, and the third table, each is referred to as a “table”. Details of the table will be described in detail later.

  The type of table held by the table holding unit 12 is determined based on the type of coordinate value input to the gesture detection device 1, the type of gesture detected by the gesture detection device 1, and the like.

  The table update unit 11 updates the table held by the table holding unit 12 based on the x coordinate value, the y coordinate value, and the z coordinate value input from the position detection device 100 to the gesture detection device 1. More specifically, the table updating unit 11 updates information regarding the x coordinate values in the first table held by the table holding unit 12 based on the x coordinate values sequentially input from the position detection device 100. In addition, the table update unit 11 updates information on the y coordinate value in the second table held by the table holding unit 12 based on the y coordinate values sequentially input from the position detection device 100. Further, the table update unit 11 updates information on the z coordinate value in the third table held by the table holding unit 12 based on the z coordinate value sequentially input from the position detection device 100.

  The gesture detection unit 13 detects the gesture of the detection target 60 based on the table updated by the table update unit 11. More specifically, the motion detection unit 14 tentatively detects a gesture of the detection target 60 based on the table updated by the table update unit 11. Then, based on the gesture (detection result) temporarily detected by the motion detection unit 14, the specifying unit 15 finally specifies the gesture of the detection target 60. The gesture specified by the specifying unit 15 is output to the outside of the gesture detection device 1 as a detection result of the gesture detection device 1.

  The gestures that can be tentatively detected by the motion detection unit 14 are the first motion, the second motion, and the third motion. More specifically, the first action is detected by the first action detector 16, the second action is detected by the second action detector 17, and the third action is detected by the third action detector 18.

  FIG. 5 is a diagram for explaining the first operation. The first operation is an operation in which the detection target 60 rotates on a coordinate plane specified by two coordinate axes. The first motion detection unit 16 detects a first motion on a certain coordinate plane based on information on coordinate values on the coordinate plane, that is, two tables. In the example shown in FIG. 5, the detection target 60 performs the first operation on the xy coordinate plane. Therefore, the first motion detection unit 16 detects the first motion shown in FIG. 5 based on the first table and the second table. In the present embodiment, the first operation may be referred to as “rotation operation”.

  In addition, unlike the example shown in FIG. 5, the first motion detector 16 can also detect the first motion on the xz coordinate plane and the first motion on the yz coordinate plane. The first motion detector 16 detects the first motion on the xz coordinate plane based on the first table and the third table. Similarly, the first motion detection unit 16 detects the first motion on the yz coordinate plane based on the second table and the third table.

  FIG. 6 is a diagram for explaining the second operation. The second operation is an operation in which the detection target 60 moves in the plus direction or the minus direction along one coordinate axis. The second motion detection unit 17 detects a second motion along a certain coordinate axis based on information regarding coordinate values on the coordinate axis, that is, one table. In the example illustrated in FIG. 6, the detection target 60 moves along the x axis in the minus direction of the x axis. Accordingly, the second motion detector 17 detects the second motion shown in FIG. 6 based on the first table. The second motion detection unit 17 can also detect a second motion in which the detection target 60 moves in the plus direction along the x axis based on the first table. In the present embodiment, the second motion in which the detection target 60 moves along the x-axis may be referred to as “left-right motion”.

  In addition, unlike the example shown in FIG. 6, the second motion detection unit 17 includes a second motion in which the detection target 60 moves along the y axis and a second motion in which the detection target 60 moves along the z axis. Can also be detected. The second motion detection unit 17 detects a second motion in which the detection target 60 moves along the y axis based on the second table. In the present embodiment, the second motion in which the detection target 60 moves along the y axis may be referred to as “vertical motion”. Further, the second motion detection unit 17 detects the second motion in which the detection target 60 moves along the z axis based on the third table. In the present embodiment, the second operation in which the detection target moves along the z-axis may be referred to as “perspective operation”.

  FIG. 7 is a diagram for explaining the third operation. The third operation is an operation in which the detection target 60 moves along a single coordinate axis for a short distance alternately in the plus direction and the minus direction. In the present embodiment, the third operation may be referred to as a “shake operation”. The third motion detection unit 18 detects a third motion along a certain coordinate axis based on information regarding coordinate values on the coordinate axis, that is, one table. In the example shown in FIG. 7, the detection target 60 performs the third operation along the z axis. Accordingly, the third motion detector 18 detects the third motion shown in FIG. 7 based on the third table.

  Similarly to the second operation, the third operation detection unit 18 detects a third operation in which the detection target 60 moves along the x axis and a third operation in which the detection target 60 moves along the y axis. It is also possible. The third motion detector 18 detects a third motion in which the detection target 60 moves along the x axis based on the first table. The third motion detection unit 18 detects a third motion in which the detection target 60 moves along the y axis based on the second table.

<2-2-2. Operation of control unit>
FIG. 8 is a diagram for explaining the operation of the control unit 10. A schematic operation of the control unit 10 will be described with reference to FIGS. First, when a coordinate value indicating the position of the detection target 60 is input from the position detection device 100 to the gesture detection device 1, the table update unit 11 updates the table held in the table holding unit 12 (step S1). ). Next, the 1st operation | movement detection part 16 detects a 1st operation | movement (step S2). Next, the 2nd operation | movement detection part 17 detects a 2nd operation | movement (step S3). Next, the 3rd operation | movement detection part 18 detects a 3rd operation | movement (step S4). As will be described in detail later, the processing of step S4 is not performed every time a coordinate value indicating the position of the detection target 60 is input to the gesture detection device 1, unlike the processing of step S2 and step S3. This is performed only when a certain condition is satisfied when the table updating unit 11 updates the table. And based on the 1st-3rd operation | movement (detection result) tentatively detected by step S2-4, the specific | specification part 15 specifies the gesture of the detection target object 60 (step S5).

  Here, the processing of steps S2 to S4 may not be performed in the order shown in FIG. The processes in steps S2 to S4 may be performed in any order as long as they are performed before the process in step S5 is started.

  Hereinafter, the table and table update unit 11, the first motion detection unit 16, the second motion detection unit 17, the third motion detection unit 18, and the specifying unit 15 will be described in detail.

<2-3. Table and Table Update Unit>
Here, after the table held by the table holding unit 12 is described, the process performed by the table update unit 11 will be described.

<Information held in the table>
As described above, the table holding unit 12 includes the first table that holds information about the x coordinate value, the second table that holds information about the y coordinate value, and the third table that holds information about the z coordinate value. Holds at least one of the tables.

  The first table shows the number of times the x coordinate value changes continuously in the same direction, that is, the plus direction or the minus direction, and the change amount of the x coordinate value when the x coordinate value changes continuously in the same direction. At least one of the accumulated values and the changing direction of the x coordinate value when the x coordinate value continuously changes in the same direction are held.

  FIG. 9 is a diagram for explaining the information held in the table. The horizontal axis in FIG. 9 indicates time, and the vertical axis indicates the value of the x coordinate value input to the gesture detection device 1. FIG. 9 shows the x-coordinate values input to the gesture detection device 1 at each of the times t1 to t6. In the example shown in FIG. 9, the x coordinate value input to the gesture detection device 1 continuously changes in the plus direction between times t2 and t5.

  Here, when attention is paid to time t5 in FIG. 9, the number of times that the x coordinate value held in the first table continuously changes in the same direction at time t5 is A. The number of times the x coordinate value continuously changes in the same direction is counted as the first time when the change of the x coordinate value appears. Therefore, A is 3.

  Similarly, when attention is paid to time t5 in FIG. 9, the cumulative value of the change amount of the x coordinate value when the x coordinate value held in the first table continuously changes in the same direction at time t5 is B. The cumulative value of the change amount of the x coordinate value at the time of interest when the x coordinate value continuously changes in a certain direction is the x coordinate value that is the starting point of the change when the x coordinate value changes in the certain direction. To the amount of change up to the x coordinate value input to the gesture detection device 1 at the time of interest. That is, B indicates the x coordinate value input to the gesture detection device 1 at the time t2 when the change of the coordinate value in the plus direction starts, and the gesture detection device 1 at the attention time (ie, time t5). This is the difference from the input x coordinate value.

  Similarly, when attention is paid to time t5 in FIG. 9, the change direction of the x coordinate value when the x coordinate value held in the first table continuously changes in the same direction at time t5 is the plus direction. It becomes. The change direction of the x coordinate value when the x coordinate value continuously changes in the same direction is either the plus direction or the minus direction.

  In the above example, the first table that holds information about the x coordinate value has been described. However, the second table that holds information about the y coordinate value and the third table that holds information about the z coordinate value also differ from the first table. The same can be considered.

  In the present embodiment, the number of times that a certain coordinate value held in the table continuously changes in the same direction may be referred to as “the number of changes”. In addition, the cumulative value of the change amount of the coordinate value when the coordinate value held in the table continuously changes in the same direction may be referred to as “cumulative change amount”. In addition, the change direction of the coordinate value when the coordinate value held in the table continuously changes in the same direction may be referred to as “change direction”.

<About processing performed by the table update unit>
FIG. 10 is a diagram for explaining processing performed by the table update unit 11. Processing performed by the table update unit 11 will be described below with reference to FIG. In the following description, the case where the table update unit 11 updates the first table will be described as an example. However, the table update unit 11 updates the second table and the third table. The same can be said for the case of performing.

  First, when the x coordinate value is input to the gesture detection device 1, the table update unit 11 acquires the first table held in the table holding unit 12 (step S10). Next, the table updating unit 11 subtracts the previous x coordinate value input to the gesture detection device 1 from the x coordinate value input this time (step S11). Here, in the present embodiment, the value obtained in step S11 is referred to as a difference value α.

  The difference value α obtained in step S11 represents the difference between the x coordinate value input this time and the x coordinate value input last time. When the difference value α obtained in step S11 is a positive value (α> 0), the change direction of the x coordinate value input this time with respect to the previously input x coordinate value is a positive direction. I can say that. On the other hand, when the difference value α obtained in step S11 is a negative value (α <0), the change direction of the x coordinate value input this time with respect to the previously input x coordinate value is a negative direction. It can be said.

  It is assumed that the previously inputted x coordinate value used in the process of step S11 is temporarily stored by the table updating unit 11. However, the x coordinate value input last time may be stored by other than the table updating unit 11 such as being held in the first table.

  Next, the table update unit 11 checks whether the first table acquired in step S10 has been initialized (step S12). More specifically, the table updating unit 11 checks whether data indicating the number of changes, the accumulated change amount, and the change direction is held in the first table acquired in step S10.

  When the first table acquired in step S10 is initialized (Yes in step S12), the table update unit 11 sets “1” as the number of changes in the first table held in the table holding unit 12. The absolute value “| α |” of the difference value α obtained in step S11 is registered in the accumulated change amount of the first table held in the table holding unit 12 (step S14). Then, the table updating unit 11 determines whether the difference value α obtained in step S11 is a positive value or a negative value (step S15).

  If α obtained in step S11 is a positive value (Yes in step S15), the x-coordinate value input this time has changed in the plus direction with respect to the previously input x-coordinate value. The table updating unit 11 registers “plus direction” as the change direction of the first table held in the table holding unit 12 (step S16). On the other hand, when the difference value α obtained in step S11 is a negative value (No in step S15), the x-coordinate value input this time changes in the minus direction with respect to the x-coordinate value input last time. Therefore, the table updating unit 11 registers “minus direction” as the change direction of the first table held in the table holding unit 12 (step S17).

  In the process of step S15, when the difference value α obtained in step S11 is 0, the table update unit 11 ends the process. That is, when the detection target 60 is not moving, the table update unit 11 does not update the first table held in the table holding unit 12.

  Returning to step S12, when the first table acquired in step S10 is not initialized (No in step S12), the table updating unit 11 determines whether the difference value α obtained in step S11 is a positive value or a negative value. This is checked (step S18).

  When the difference value α obtained in step S11 is a positive value, that is, when the x-coordinate value input this time is changing in the plus direction with respect to the previously input x-coordinate value (step S18). Yes), the table updating unit 11 checks whether or not the change direction held in the first table acquired in step S10 is the “plus direction” (step S19). When the change direction held in the first table is the plus direction, that is, when the x coordinate value is changing in the plus direction again this time (Yes in step S19), the table updating unit 11 A value obtained by adding “+1” to the number of changes held in the first table acquired in step S10 is registered in the first table held in the table holding unit 12 (step S20). Then, the table updating unit 11 registers a value obtained by adding “| α |” to the cumulative change amount held in the first table acquired in step S10 in the first table held in the table holding unit 12. (Step S21). Since the x coordinate value continues to change in the same direction as the previous time, the table update unit 11 does not update the change direction of the first table held in the table holding unit 12.

  Returning to step S19, if the direction held in the first table acquired in step S10 is not the positive direction (No in step S19), that is, the change direction of the x coordinate value up to the previous time (negative direction) is input last time. If the direction of change of the x coordinate value input this time (plus direction) with respect to the x coordinate value is opposite, the table update unit 11 changes the change direction with respect to the third motion detection unit 18. (Step S22), and the first table held in the table holding unit 12 is initialized (step S23). Thus, when the x coordinate values do not change in the same direction, the table updating unit 11 initializes the first table held in the table holding unit 12. As will be described in detail later, the third motion detection unit 18 performs a third motion detection process using the table immediately before being initialized in step S23. Therefore, the table update unit 11 notifies the third motion detection unit 18 before the table is initialized in step S23. Upon receiving the notification from the table update unit 11, the third motion detection unit 18 acquires the table before being initialized from the table holding unit 12.

  Returning to step S18, if the difference value α obtained in step S11 is a negative value, that is, the x-coordinate value input this time has changed in the minus direction with respect to the previously input x-coordinate value. (No in step S18), the table updating unit 11 checks whether or not the change direction held in the first table acquired in step S10 is the “plus direction” (step S24).

  If the change direction stored in the first table acquired in step S10 is a positive direction, that is, the change direction of the x coordinate value up to the previous time (plus direction) and the x coordinate value input last time When the input x-coordinate value change direction (minus direction) is opposite (Yes in step S24), the table updating unit 11 changes the change direction with respect to the third motion detection unit 18. A notification to that effect is sent (step S22), and the first table held in the table holding unit 12 is initialized (step S23).

  In the process of step S18, when the difference value α obtained in step S11 is 0, the table update unit 11 ends the process. That is, when the detection target 60 is not moving along the x axis, the table update unit 11 does not update the first table held in the table holding unit 12.

  Returning to step S24, if the change direction stored in the first table is not the positive direction, that is, if the x coordinate value has changed to the negative direction again this time (No in step S24), the table is updated. The unit 11 registers a value obtained by adding “+1” to the number of changes held in the first table acquired in step S10 in the first table held in the table holding unit 12 (step S20). Then, the table updating unit 11 adds a value obtained by adding the absolute value “| α |” of α obtained in step S11 to the cumulative change amount held in the first table acquired in step S10. 12 is registered in the first table held in 12 (step S21).

  As described above, in the present embodiment, each table used by the gesture detection unit 13 (motion detection unit 14) to detect the gesture of the detection target 60 is used as the detection target 60 input to the gesture detection device 1. It can be easily updated based on the coordinate value indicating the position and the table held in the table holding unit 12. As a result, the gesture detection apparatus 1 can detect the gesture of the detection target 60 by a simple process.

  Note that the table updating unit 11 does not perform the processing of step S13 and step S20 when the information on the number of changes is not held in the table held by the table holding unit 12. Similarly, the table updating unit 11 does not perform the processing of step S14 and step S21 when the information of the accumulated change amount is not held in the table held by the table holding unit 12.

<Example of processing performed by table update unit>
FIG. 11 is a diagram illustrating an example of the first table. FIG. 11 shows the relationship between the x-coordinate value input to the gesture detection device 1 at times t1 to t4 and the first table (number of changes, cumulative change amount, and change direction). An example of the first table update process performed by the table update unit 11 will be described below with reference to FIGS.

  As illustrated in FIG. 11, “30” is input to the gesture detection device 1 as the x coordinate value at time t <b> 1. Since the table updating unit 11 does not store the x coordinate value input to the gesture detection device 1 before time t1 (that is, the x coordinate value input to the gesture detection device 1 last time), the table update unit 11 performs processing at time t1. Absent.

  At time t1, the first table is initialized. That is, the first table held by the table holding unit 12 at time t1 does not hold data indicating the number of changes, the accumulated change amount, and the change direction.

  Next, when “45” is input as the x-coordinate value to the gesture detection device 1 at time t2, the table updating unit 11 receives “30” input as the x-coordinate value to the gesture detection device 1 at time t1. And the x-coordinate value “45” input to the gesture detection device 1 at time t2 and the first table at time t1, the number of changes, the accumulated change amount, and the change direction in the first table. Register.

  First, when the x coordinate value “30” input to the gesture detection device 1 at time t1 is subtracted from the x coordinate value “45” input to the gesture detection device 1 at time t2, “15 (= α) ”(step S11 in FIG. 10). The table at the time t1 (the table before update) is initialized (Yes in step S12 in FIG. 10).

  Therefore, at time t2, the table updating unit 11 registers “1” indicating that the change of the x coordinate value is the first change in the number of changes of the first table held in the table holding unit 12 (FIG. 10). Step S13). Subsequently, at time t2, the table updating unit 11 registers “15 (= | α |)” as the cumulative change amount of the first table held in the table holding unit 12 (step S15 in FIG. 10). Since the value α (= 15) obtained in step S11 is a positive value (Yes in step S15 in FIG. 10), the table update unit 11 stores the first table held in the table holding unit 12. The “plus direction” is registered as the change direction (step S16 in FIG. 10).

  Next, when “48” is input as the x-coordinate value to the gesture detection device 1 at time t3, the table update unit 11 receives “45” input as the x-coordinate value to the gesture detection device 1 at time t2. And the table holding unit 12 using “48” input as the x-coordinate value to the gesture detection device 1 at time t3 and the first table updated to the table updating unit 11 at time t2. The held first table is updated.

  First, when the x coordinate value “45” input to the gesture detection device 1 at time t2 is subtracted from the x coordinate value “48” input to the gesture detection device 1 at time t3, “3 (= α) ”(step S11 in FIG. 10). Further, the number of changes “1”, the accumulated change amount “15”, and the change direction “plus direction” are registered in the first table updated in the table update unit 11 at time t2 (step in FIG. 10). No in S12). The value α (= 3) obtained in step S11 is a positive value (Yes in step S18 in FIG. 10), and “plus direction” is registered as the change direction of the first table acquired in step S10. (Yes in step S19 in FIG. 10).

  Therefore, at time t3, the table updating unit 11 holds the value “2” obtained by adding “+1” to the number of changes “1” held in the first table acquired in step S10 in the table holding unit 12. The number of changes in the first table is registered (step S20 in FIG. 10). Subsequently, the table updating unit 11 sets a value “18” obtained by adding “| 3 (= α) |” to the cumulative change amount “15” held in the first table acquired in Step S10, and the table holding unit. 12 is registered in the cumulative change amount of the first table held in 12.

  Next, when “40” is input as the x-coordinate value to the gesture detection device 1 at time t4, the table update unit 11 receives “48” input as the x-coordinate value to the gesture detection device 1 at time t3. And the table holding unit 12 using “40” input as the x-coordinate value to the gesture detection device 1 at time t4 and the first table updated to the table updating unit 11 at time t3. The held first table is updated (step S10 in FIG. 10).

  First, when the x-coordinate value “48” input to the gesture detection device 1 at time t3 is subtracted from the x-coordinate value “40” input to the gesture detection device 1 at time t4, “−8 ( = Α) ”(step S11 in FIG. 10). Further, the number of changes “2”, the accumulated change amount “18”, and the change direction “plus direction” are registered in the first table acquired in step S10 (No in step S12 of FIG. 10). Further, −8 (= α) is a negative value (No in step S18 in FIG. 10), and “plus direction” is registered in the change direction of the first table acquired in step S10 (FIG. 10). (Yes in step S24). Therefore, the table update unit 11 notifies the third motion detection unit 18 that the change direction has changed (step S22 in FIG. 10), and initializes the first table held in the table holding unit 12. This is performed (step S23 in FIG. 10).

  Thereafter, similarly, the table updating unit 11 updates the first table held in the table holding unit 12 based on the x coordinate value input to the gesture detection device 1 and the first table.

<When the table update unit updates multiple tables>
FIGS. 12 and 13 are diagrams showing the flow of processing when the table update unit 11 updates three types of tables (first table, second table, and third table) held in the table holding unit 12. It is.

  As illustrated in FIG. 12, when updating the three types of tables, the table update unit 11 uses the x coordinate value input to the gesture detection device 1 to hold the first table held in the table holding unit 12. After updating one table (step S1a), the second table held in the table holding unit 12 is updated using the y coordinate value input to the gesture detection device 1 (step S1b), and the gesture The third table held in the table holding unit 12 is updated using the z coordinate value input to the detection device 1 (step S1c). The process illustrated in FIG. 12 is an example, and the number of tables updated by the table update unit 11 and the order in which the update is performed are not limited to the example illustrated in FIG.

  Further, as shown in FIG. 13, the table update unit 11 does not change between the value input to the previous gesture detection device 1 and the value input to the gesture detection device 1 this time (that is, the previous gesture detection device 1). In the case where the value input to 1 and the value input to the gesture detection device 1 this time are the same value), the table update process using the coordinate values may not be performed.

  As shown in FIG. 13, the table updating unit 11 determines whether there is a change between the x coordinate value input to the gesture detection device 1 this time and the x coordinate value input to the gesture detection device 1 last time (step). S25a). When there is a change between the x coordinate value input to the gesture detection device 1 this time and the x coordinate value input to the gesture detection device 1 last time (Yes in step S25a), the table update unit 11 performs the table holding unit 12 The update process of the first table held in the table is performed (step S1a).

  On the other hand, when there is no change between the x coordinate value input to the gesture detection device 1 this time and the x coordinate value input to the gesture detection device 1 last time (No in step S25a), the table update unit 11 holds the table. The next process (step S25b in the example shown in FIG. 13) is started without updating the first table held in the unit 12.

  Since the x coordinate value input to the gesture detection device 1 this time is the same as the x coordinate value input to the gesture detection device last time, it can be said that the detection target 60 does not move along the x axis. When the detection object 60 is not moving along the x-axis, even if the table update unit 11 performs the update process of the first table held in the table holding unit 12, the information held in the first table does not change. . Therefore, as described above, when the x-coordinate value input to the previous gesture detection device 1 is the same as the x-coordinate value input to the previous gesture detection device, the table update unit 11 performs the table holding unit 12. The first table held in is not updated. As a result, the gesture detection device 1 can reduce the amount of processing performed by the gesture detection device 1 when the detection target 60 is not moving.

  Similarly, the table updating unit 11 checks whether there is a change between the y coordinate value input to the gesture detection device 1 this time and the y coordinate value input to the gesture detection device 1 last time (step S25b). If there is a change between the y coordinate value input to the gesture detection device 1 this time and the y coordinate value input to the gesture detection device 1 last time (Yes in step S25b), the table update unit 11 performs the table holding unit 12 The second table held in is updated (step S1b). On the other hand, when there is no change between the y coordinate value input to the gesture detection device 1 and the y coordinate value input to the previous gesture detection device 1 (No in step S25b), the table update unit 11 holds the table. The second table held in the unit 12 is not updated.

  Similarly, the table updating unit 11 checks whether there is a change between the z coordinate value input to the gesture detection device 1 this time and the z coordinate value input to the gesture detection device 1 last time (step S25c). When there is a change between the z coordinate value input to the gesture detection device 1 this time and the z coordinate value input to the gesture detection device 1 last time (Yes in step S25c), the table update unit 11 performs the table holding unit 12 The third table held in the table is updated (step S1c). On the other hand, when there is no change between the z coordinate value input to the gesture detection device 1 and the z coordinate value input to the previous gesture detection device 1 (No in step S25c), the table update unit 11 holds the table. The third table held in the unit 12 is not updated.

<2-4. Overview of first motion detection unit>
As described above, the first motion detector 16 detects the rotational motion as shown in FIG. 5 based on the two tables. More specifically, when the first motion detection unit 16 detects the first motion of the detection target 60 rotating on the xy coordinate plane, the first and second tables updated by the table update unit 11. The detection process is performed using. In addition, when detecting the first motion of the detection target 60 rotating on the xz coordinate plane, the first motion detection unit 16 detects using the first and third tables updated by the table update unit 11. Process. In addition, when detecting the first motion of the detection target 60 rotating on the yz coordinate plane, the first motion detection unit 16 detects using the second and third tables updated by the table update unit 11. Process.

  FIG. 14 is a diagram illustrating a configuration of the first motion detection unit 16. FIG. 15 is a diagram for explaining processing in the first motion detection unit 16. As illustrated in FIG. 14, the first motion detection unit 16 includes a movement direction identification unit 20 and a first determination unit 21. A schematic operation of the first motion detection unit 16 will be described below with reference to FIGS.

  First, the moving direction specifying unit 20 specifies the direction (moving direction) in which the detection target 60 has moved based on the two tables updated by the table updating unit 11 (step S30). Then, the 1st determination part 21 hold | maintains the order in which the moving direction of the detection target object 60 was specified in the moving direction specific | specification part 20 as log | history information (step S31). And the 1st determination part 21 determines whether the order in which the movement direction of the detection target object 60 was specified in the movement direction specific | specification part 20 shows a predetermined order based on historical information (step S32). If the order in which the movement direction of the detection object 60 is specified by the movement direction specification unit 20 based on the history information indicates a predetermined order, the first determination unit 21 causes the detection object 60 to perform the first operation. Judge that it has been done.

  The predetermined order used by the first determination unit 21 in the process of step S32 will be described below with reference to FIGS. FIG. 16 is a diagram illustrating an example when the detection target 60 performs the first operation on the xy coordinate plane. FIG. 17 is a diagram illustrating the x-coordinate value and the y-coordinate value detected by the position detection device 100 when the first operation shown in FIG. In the following description, the case where the detection target 60 performs the first operation on the xy coordinate plane will be described as an example. However, the detection target 60 may be on another coordinate plane (more specifically, The same can be considered when the first operation is performed on the xz coordinate plane or the yz coordinate plane.

  FIG. 16 shows the movement of the detection object 60 from time T0 to T4. In the example shown in FIG. 16, the detection target 60 performs the first operation of rotating clockwise by performing the movement shown at times T0 to T4. In the present embodiment, for the sake of convenience, as shown in FIG. 16, the positive direction of the x axis is referred to as “right direction”, and the negative direction of the x axis is referred to as “left direction”. Similarly, the positive direction of the y axis is referred to as “upward”, and the negative direction of the y axis is referred to as “downward”.

  More specifically, at time T0 to T1, the detection target 60 draws an arc around the origin of the xy coordinate plane from the lower left area on the xy coordinate plane toward the upper left area on the xy coordinate plane. Has moved. At times T1 to T2, the detection target 60 moves from an upper left area on the xy coordinate plane toward an upper right area on the xy coordinate plane so as to draw an arc centering on the origin of the xy coordinate plane. At times T2 to T3, the detection target 60 moves from an upper right region on the xy coordinate plane toward a lower right region on the xy coordinate plane so as to draw an arc centering on the origin of the xy coordinate plane. . Then, at times T3 to T4, the detection object 60 moves from the lower right region on the xy coordinate plane toward the lower left region on the xy coordinate plane so as to draw an arc centering on the origin of the xy coordinate plane. ing.

  On the other hand, the x-coordinate value detected by the position detection device 100 is shown in the upper graph of FIG. 17, and the y-coordinate value detected by the position detection device 100 is shown in the lower graph. In each graph, the horizontal axis indicates time, and the vertical axis indicates coordinate values detected by the position detection device 100.

  When the detection target 60 performs the first operation as shown in FIG. 16, as shown in FIG. 17, the x coordinate value hardly changes at time T0 to T1, and the y coordinate value is Changes upward. That is, at time T0 to T1, it can be said that the direction in which the detection target 60 specified by the x-coordinate value and the y-coordinate value input from the position detection device 100 moves is the upward direction.

  Subsequently, at times T1 to T2, the x coordinate value changes to the right and the y coordinate value hardly changes. That is, at time T1 to T2, it can be said that the direction in which the detection target 60 specified by the x coordinate value and the y coordinate value input from the position detection device 100 moves is the right direction.

  Subsequently, at times T2 to T3, the x coordinate value hardly changes and the y coordinate value changes downward. That is, at time T2 to T3, it can be said that the direction in which the detection target 60 specified by the x coordinate value and the y coordinate value input from the position detection device 100 moves is the downward direction.

  At times T3 to T4, the x coordinate value changes to the left, and the y coordinate value hardly changes. That is, at time T3 to T4, it can be said that the direction in which the detection target 60 specified from the x coordinate value and the y coordinate value input from the position detection device 100 moves is the left direction.

  Therefore, when performing the first operation in which the detection target 60 rotates clockwise, the detection target 60 moves upward based on the x-coordinate value and the y-coordinate value input from the position detection device 100 ( After it is specified that the times T0 to T1 in FIG. 16), the detection object 60 is specified to move rightward (times T1 to T2 in FIG. 16). Similarly, after it is determined that the detection target 60 has moved rightward (time T1 to T2 in FIG. 16) based on the x-coordinate value and the y-coordinate value input from the position detection device 100, the detection is performed. It is specified when the object 60 moves downward (time T2 to T3 in FIG. 16). Similarly, after it is determined that the detection target 60 has moved downward (time T2 to T3 in FIG. 16) based on the x-coordinate value and the y-coordinate value input from the position detection device 100, the detection target It is specified when the object 60 moves leftward (time T3 to T4 in FIG. 16).

  As shown in FIG. 16, when the first operation is performed in which the detection target 60 rotates clockwise from the lower left region on the xy coordinate plane, the x coordinate value input from the position detection device 100 and As described above, the moving direction of the detection target 60 specified based on the y coordinate value changes in the order (predetermined order) in the upward direction, the right direction, the downward direction, and the left direction.

  Therefore, in the 1st operation | movement detection part 16 in this Embodiment, the movement direction specific | specification part 20 specifies the movement direction of the detection target object 60 based on the two tables updated by the table update part 11 (step S30). The first determination unit 21 detects the detection target object when the order in which the movement direction of the detection target object 60 is specified by the movement direction specification unit 20 indicates a predetermined order such as upward, rightward, downward, and leftward. It is determined that 60 is performing the first operation (steps S31 and S32).

  Note that the predetermined order used in the process of step S32 is not limited to the above-described order of upward, rightward, downward, and leftward. A detection target that should be specified from the x-coordinate value and the y-coordinate value depending on from which position on the coordinate plane the detection target object 60 starts, whether it rotates clockwise or counterclockwise The order of the moving direction of the object 60 is different. Therefore, there are a plurality of predetermined orders used in the process of step S32. The types of the predetermined order will be described later.

  In addition, the 1st motion detection part 16 repeatedly performs the process of step S2 shown by FIG. 15, when detecting the 1st motion in a some coordinate plane. For example, when the first motion detection unit 16 detects the first motion on the xy coordinate plane and the first motion on the xz coordinate plane, the first motion detection unit 16 detects the first motion on the xy coordinate plane. After performing the process of step S2 using the first and second tables to detect one motion, the first and third tables are used to detect the first motion on the xz coordinate plane. What is necessary is just to process.

  Below, the moving direction specific | specification part 20 and the 1st determination part 21 are demonstrated in detail.

<2-4-1. Moving direction identification section>
<About processing performed in the moving direction specifying unit>
As described above, the movement direction specifying unit 20 specifies the direction in which the detection target 60 has moved. FIG. 18 is a diagram illustrating x-coordinate values detected by the position detection device 100. FIG. 19 is a diagram showing the first table updated in the table update unit 11 at times T10 and T11 shown in FIG. The outline of the processing performed by the movement direction identification unit 20 will be described with reference to FIGS.

  In the following description, a case where the moving direction specifying unit 20 specifies the moving direction of the detection target 60 based on the first table will be described as an example. The same applies to the case where the movement direction of the detection object 60 is specified based on the above and the case where the movement direction of the detection object 60 is specified based on the third table.

  As shown in FIGS. 18 and 19, the first table updated by the table updating unit 11 at time T <b> 10 holds “C1” as the number of changes and “L1” as the cumulative change amount. The “plus direction” is maintained in the change direction. In this case, when the number of changes C1 is greater than the first threshold value and the cumulative change amount L1 is greater than the second threshold value, the movement direction specifying unit 20 moves the detection target 60 in the plus direction (that is, rightward direction). ).

  Similarly, in the first table updated to the table update unit 11 at time T11, “C2” is held as the number of changes, “L2” is held as the cumulative change amount, and the change direction is changed. “Negative direction” is held. In this case, when the number of changes C2 is greater than the first threshold value and the cumulative change amount L2 is greater than the second threshold value, the movement direction specifying unit 20 moves the detection target 60 in the minus direction (that is, leftward direction). ).

  The movement direction identification unit 20 determines whether or not the number of changes held in the table updated by the table update unit 11 is larger than the first threshold, thereby determining the first time corresponding to the first threshold. It is determined whether or not the detection object 60 has moved in the same direction for a longer time. In addition, the movement direction identification unit 20 determines whether or not the cumulative change amount stored in the table updated by the table update unit 11 is larger than the second threshold value, thereby responding to the second threshold value. It is determined whether or not the detection object 60 is moving in the same direction over a distance longer than the first distance.

  Even when the cumulative change amount stored in the table updated by the table update unit 11 is larger than the second threshold, the movement direction identification unit 20 determines that the number of changes held in the table is the first. When it is smaller than the threshold, it is not specified that the detection target 60 has moved in the direction indicated by the change direction held by the table. That is, even if the detection target 60 operates at a high speed and moves a distance longer than the first distance, if the time for performing the operation is shorter than the first time, the movement direction specifying unit 20 detects It is not specified that the object 60 has moved in the direction indicated by the change direction held in the table updated by the table updating unit 11. For this reason, the movement direction specifying unit 20 according to the present embodiment changes the coordinate value even when the coordinate value input to the gesture detection device 1 has temporarily changed significantly due to the influence of noise or the like. Is not determined to be due to the operation of the detection object 60.

  Similarly, even when the number of changes held in the table updated by the table update unit 11 is greater than the first threshold, the movement direction identification unit 20 determines that the accumulated change amount held in the table is the same. When it is smaller than the second threshold value, it is not determined that the detection target 60 has moved in the direction indicated by the change direction held in the table. That is, if the detection object 60 operates at a slow speed and the operation is performed for a time longer than the first time, but the detection object 60 moves only a distance shorter than the first distance, the movement direction The identifying unit 20 does not determine that the detection target 60 has moved. Therefore, the moving direction specifying unit 20 according to the present embodiment, for example, even when a small change occurs in the coordinate value input to the gesture detection device 1 when the detection target 60 is not performing a gesture, It is not determined that the change in the coordinate value is due to the operation of the detection target 60.

  For example, 4 [times] is adopted as the first threshold, and 30 [mm] is adopted as the second threshold. The first threshold value and the second threshold value are selected according to the usage application of the gesture detection device 1 (for example, the speed at which the detection target 60 moves, the size of the rotation trajectory when performing the first action, etc.), and the like. The

  As described above, in the present embodiment, the movement direction specifying unit 20 determines the number of changes (time when the detection target 60 has moved) and the accumulated change amount (distance that the detection target 60 has moved) held in the table. Is used to determine whether or not the detection object 60 has moved. Therefore, when the coordinate value input into the gesture detection apparatus 1 changes with noise etc., it can suppress that the change of the said coordinate value is specified as operation | movement of the detection target object 60 by the movement direction specific | specification part 20. . As a result, the gesture detection accuracy of the gesture detection device 1 can be improved.

<Flow of processing in the moving direction identification unit>
20 and 21 are diagrams for explaining processing performed by the movement direction identification unit 20. The flow of processing performed by the movement direction identification unit 20 will be described below with reference to FIGS.

  As illustrated in FIG. 20, first, the movement direction identification unit 20 acquires two tables used for detection of the first motion (step S35). For example, when the first motion detection unit 16 detects the first motion on the xy coordinate plane, the movement direction identification unit 20 uses the first table and the second table updated by the table update unit 11 in step S35. get. Next, the moving direction specifying unit 20 specifies whether or not the detection target 60 is moving downward (step S36a). FIG. 21 shows details of the process in step S36a.

  As shown in FIG. 21, the moving direction specifying unit 20 stores the table necessary for specifying whether or not the detection object 60 is moving downward, that is, the table updating unit 11 based on the y coordinate value. The updated second table is acquired (step S40).

  Subsequently, the movement direction specifying unit 20 checks whether or not the change direction held in the second table acquired in Step S40 is a downward direction (a negative direction) (Step S41). When the change direction held in the second table acquired in step S40 is not downward (No in step S41), the movement direction identification unit 20 identifies that the detection target 60 has not moved downward. (Step S42), and the process of Step S36a is terminated. On the other hand, when the change direction held in the second table acquired in step S40 is the downward direction (Yes in step S41), the movement direction specifying unit 20 changes the number of changes held in the second table. Is greater than the first threshold (step S43).

  When the number of changes held in the second table acquired in step S40 is smaller than the first threshold value or the same value as the first threshold value (No in step S43), the moving direction specifying unit 20 Then, it is specified that the detection target 60 has not moved downward (step S42), and the process of step S36a is terminated. On the other hand, if the number of changes held in the second table acquired in step S40 is greater than the first threshold (Yes in step S43), the moving direction identification unit 20 holds the change in the second table. It is checked whether the accumulated change amount is larger than the second threshold (step S44). In the present embodiment, when the number of changes held in the second table acquired in step S40 and the first threshold value are the same value, the movement direction specifying unit 20 indicates that the detection object 60 is lower. Identified as not moving in the direction. However, the moving direction identification unit 20 may proceed to step S44 when the number of changes held in the second table acquired in step S40 and the first threshold value are the same value.

  In step S44, when the cumulative change amount stored in the second table acquired in step S40 is smaller than the second threshold value or the same as the second threshold value (No in step S44), the moving direction specifying unit 20 specifies that the detection target 60 has not moved downward (step S42), and ends the process of step S36a. On the other hand, when the cumulative change amount stored in the second table acquired in step S40 is larger than the second threshold (Yes in step S44), the moving direction specifying unit 20 moves the detection target 60 downward. It identifies that it is moving (step S45), and ends the process of step S36a. In the present embodiment, when the cumulative change amount stored in the second table acquired in step S40 is the same value as the second threshold value, the movement direction specifying unit 20 determines that the detection target 60 is Identifies that it has not moved downward. However, when the cumulative change amount stored in the second table acquired in step S40 and the second threshold value are the same value, the movement direction specifying unit 20 moves the detection target 60 downward. You may specify that

  Returning to FIG. 20, when it is determined in step S36a (the process shown in FIG. 21) that the detection target 60 is moving downward (Yes in step S36a), the movement direction specifying unit 20 The identification result that the detection object 60 has moved downward is sent to the first determination unit 21 (step S37a), and the process of step S30 is terminated. On the other hand, when it is determined in step S36a (the process shown in FIG. 21) that the detection target 60 has not moved downward (No in step S36a), the movement direction specifying unit 20 It is determined whether or not the object 60 has moved to the right (step S36b).

  In step S36b, the movement direction specifying unit 20 specifies whether or not the detection target 60 has moved to the right in the same procedure as in the process of step S36a (see FIG. 21). The difference between step S36a and step S36b is the table used for processing and the change direction used for determination. More specifically, in step S36a, processing is performed using the second table, whereas in step S36b, processing is performed using the first table. Therefore, in step S36b, unlike step S40 of step S36a shown in FIG. 21, the moving direction specifying unit 20 acquires the first table. In step S36a, it is determined whether or not the detection object 60 is moving downward (minus direction). In step S36b, the detection object 60 is moved rightward (plus direction). It is determined whether or not. Accordingly, in step S36b, unlike step S36a and step S41 shown in FIG. 21, the movement direction specifying unit 20 determines whether or not the change direction held in the acquired table is the right direction (plus direction).

  It should be noted that specifying whether or not the detection target 60 is moving upward in step 36c described later and specifying whether or not the detection target 60 is moving rightward in step S36d are also performed in steps S36a and S36a. The same procedure as that in step S36b can be performed.

  Returning to FIG. 20, when it is determined in step S <b> 36 b that the detection target 60 has moved to the right (Yes in step S <b> 36 b), the movement direction specifying unit 20 has moved the detection target 60 to the right. Is sent to the first determination unit 21 (step S37b), and the process of step S30 is terminated. On the other hand, when it is determined in step S36b that the detection target 60 has not moved in the right direction (No in step S36b), the movement direction specification unit 20 moves the detection target 60 in the upward direction. Is determined (step S36c).

  When it is determined in step S36c that the detection target 60 has moved upward (Yes in step S36c), the movement direction specification unit 20 obtains a specific result indicating that the detection target 60 has moved upward. 1 is sent to the determination unit 21 (step S37c), and the process of step S30 is terminated. On the other hand, when it is determined in step S36c that the detection target 60 has not moved upward (No in step S36c), the movement direction specification unit 20 moves the detection target 60 in the left direction. Whether or not (step S36d).

  If it is determined in step S36d that the detection object 60 has moved leftward (Yes in step S36d), the movement direction identification unit 20 determines the identification result that the detection object 60 has moved leftward. 1 is sent to the determination unit 21 (step S37d), and the process of step S30 is terminated. On the other hand, when it is determined in step S36d that the detection target 60 has not moved leftward (No in step S36c), the movement direction identification unit 20 ends the processing of the first motion detection unit 16. (Step S38).

  As described above, when detecting the first movement on the coordinate plane composed of the first coordinate axis and the second coordinate axis, the movement direction specifying unit 20 detects the positive direction of the first coordinate axis, the negative direction of the first coordinate axis, Whether the detection object 60 is moving in any one of the plus direction of the coordinate axes and the minus direction of the second coordinate axes is examined in order one by one. When the movement direction identification unit 20 identifies that the detection object 60 is moving in a certain direction, the movement direction identification unit 20 sends the identification result to the first determination unit 21 and ends the process of the movement direction identification unit 20. To do. On the other hand, when the detection target 60 has not moved in any of the four directions, since the gesture of the detection target 60 is not detected based on the identification result, the movement direction specification unit 20 Then, the operation of the first motion detector 16 is terminated.

  In the example shown in FIG. 20, the moving direction specifying unit 20 determines whether the detection target 60 is moving downward (step S36a) or whether the detection target 60 is moving right (step S36b). The movement direction of the detection object 60 is specified in the order of whether the detection object 60 is moving upward (step S36c) or whether the detection object is moving leftward (step S36d). It is not always necessary to specify in this order. For example, the moving direction specifying unit 20 determines whether the detection target 60 is moving leftward (step S36d), whether the detection target 60 is moving rightward (step S36b), or whether the detection target 60 is downward. The moving direction of the detection object 60 may be specified in the order of whether the detection object 60 is moving upward (step S36a) or whether the detection object 60 is moving upward (step S36c).

  In the present embodiment, the moving direction specifying unit 20 specifies the moving direction of the detection target object 60 using three pieces of information of the number of changes, the accumulated change amount, and the changing direction held in the table. . However, the movement direction specifying unit 20 may specify the movement direction of the detection target 60 using the number of changes and the change direction held in the table, or the accumulated change amount and change direction held in the table. The moving direction of the detection object 60 may be specified using

<2-4-2. First determination unit>
<About processing performed in the first determination unit>
As described above, the first determination unit 21 holds the order in which the movement direction of the detection target 60 is specified by the movement direction specification unit 20 as history information. Then, the first determination unit 21 determines whether or not the order in which the movement direction of the detection object 60 is specified in the movement direction specification unit 20 indicates a predetermined order based on the history information. It is detected whether or not the object 60 has performed the first operation.

  FIG. 22 is a diagram showing history information held by the first determination unit 21 when the detection target 60 performs the gesture shown in FIG. In the horizontal direction of FIG. 22, the time, the moving direction specified by the moving direction specifying unit 20, and the history information held by the first determining unit 21 are shown.

  As illustrated in FIG. 22, the history information held by the first determination unit 21 includes a first history, a second history, a third history, and a fourth history. The first determination unit 21 holds the moving direction specified by the moving direction specifying unit 20 first as the first history. Then, when the moving direction is specified by the moving direction specifying unit 20 next, the moving direction specified by the moving direction specifying unit 20 is held as the second history. Therefore, when the movement direction identification unit 20 holds all of the first to fourth histories, the movement direction held as the first history is the oldest identification result, and is held as the fourth history. The moving direction is the newest specific result.

  As illustrated in FIG. 22, when the movement direction of the detection target 60 is identified as the upward direction by the movement direction identification unit 20 at time T1, the first determination unit 21 performs the identification result (upward direction). Is stored as the first history. Next, when the movement direction identification unit 20 identifies that the movement direction of the detection target 60 is the right direction at time T2, the first determination unit 21 holds the identification result (right direction) as the second history. To do. Next, when the movement direction identification unit 20 identifies that the movement direction of the detection target 60 is downward at time T3, the first determination unit 21 holds the identification result (downward) as the third history. To do. And if the movement direction of the detection target object 60 is identified as the left direction by the movement direction identification unit 20 at time T4, the first determination unit 21 holds the identification result (left direction) as the fourth history. .

  Here, the history information at time T4 is the upward direction, the right direction, the downward direction, and the left direction in order from the first history, and the order of these movement directions is that the detection target 60 is located at the lower left of the xy coordinate plane. The predetermined order when performing the 1st operation | movement which rotates clockwise from an area | region is shown (refer FIG. 17). Therefore, the 1st determination part 21 detects that the detection target object 60 is performing 1st operation | movement based on the historical information at the time T4.

  FIG. 23 is a diagram illustrating a plurality of types of predetermined orders used by the first determination unit 21 to determine whether or not the detection target 60 is performing the first operation. Nos. 1 to 4 shown in FIG. 23 show the order of a plurality of types of movement directions when the detection target 60 is performing the first operation of rotating clockwise. No. 5 to 8 in FIG. 23 show the order of the plurality of types of movement directions when the detection target 60 is performing the first operation of rotating counterclockwise. In the present embodiment, for the sake of convenience, the first operation in which the detection target 60 rotates clockwise may be referred to as a “first rotation operation”. Further, the first operation in which the detection target 60 rotates counterclockwise may be referred to as “second rotation operation”.

  The order of the plurality of types shown in No. 1 to No. 4 is different in that the detection object 60 starts the first rotation operation from which position on the xy coordinate plane. Accordingly, the movement direction of the detection object 60 is common in that it is the right direction after the upward direction, the downward direction after the right direction, and the left direction after the downward direction.

  Similarly, the order of the plurality of types shown in No. 5 to No. 8 is also different in that the detection object 60 starts the second rotation operation on the xy coordinate plane, like No. 1 to No. 4. Accordingly, the movement direction of the detection target 60 is common in that it is the right direction after the downward direction, the upward direction after the right direction, and the left direction after the upward direction.

  In the first determination unit 21, the order in which the movement direction of the detection target 60 is specified by the movement direction specification unit 20 indicated by the history information indicates any one of the eight types of orders shown in FIG. Sometimes, it detects that the detection target 60 is performing the first operation. That is, the first determination unit 21 performs the first operation of the detection target 60 by simply determining whether or not the order in which the movement direction of the detection target 60 is specified by the movement direction specifying unit 20 indicates a predetermined order. Whether it is going or not can be detected. As a result, the gesture detection device 1 can detect the first action performed by the detection target 60 by a simple process.

  Moreover, the 1st determination part 21 differs on a coordinate plane by comparing the order in which the moving direction of the detection target object 60 was specified in the movement direction specific | specification part 20 which historical information shows, and multiple types of order. A rotational motion starting from the position can be detected. As a result, the convenience of the gesture detection device 1 is improved.

  Moreover, the 1st determination part 21 is any one of the order in which the movement direction of the detection target 60 was specified in the movement direction specific | specification part 20 which historical information shows is shown in No1-No4 of FIG. Or whether the detection target 60 is performing the first rotation operation or the second rotation by determining whether one of the orders indicated in No. 5 to No. 8 is indicated. It is possible to detect whether the operation is being performed. In this case, since the 1st determination part 21 can distinguish and detect 1st rotation operation | movement and 2nd rotation operation | movement, the convenience of the gesture detection apparatus 1 improves.

  Moreover, the 1st determination part 21 shows specific one of No1-No8 of FIG. 23 in the order in which the movement direction of the detection target object 60 was specified in the movement direction specific | specification part 20 which historical information shows. It may be determined whether it is present. In this case, the 1st determination part 21 can distinguish and detect the rotation operation | movement started from a different position on a coordinate plane with the detection target object 60. FIG. Specifically, the first determination unit 21 performs, for example, a clockwise rotation operation starting from the lower left in the xy coordinate plane indicated by No1, and a clockwise rotation started from the upper left in the xy coordinate plane indicated by No2. It is possible to detect the movement separately. As a result, the convenience of the gesture detection device 1 is improved.

  On the other hand, when the operation of the detection target 60 is not the first operation, the first determination unit 21 clears (deletes) the history information when it is determined that the operation of the detection target 60 is not the first operation. To do. A case where the operation of the detection target 60 is not the first operation will be described below with reference to FIGS. FIG. 24 is a diagram illustrating the operation of the detection target 60 on the xy coordinate plane corresponding to FIG. FIG. 25 is a diagram illustrating history information held in the first determination unit 21 when the detection target 60 performs the operation illustrated in FIG.

  As shown in FIG. 24, at times T20 to T21, the detection target 60 forms an arc centering on the origin of the xy coordinate plane from the lower left area on the xy coordinate plane toward the upper left area on the xy coordinate plane. It is moving like drawing. At times T21 to T22, the detection target 60 moves from an upper left area on the xy coordinate plane toward an upper right area on the xy coordinate plane so as to draw an arc around the origin of the xy coordinate plane. And in the time T22-T23, the detection target object 60 is moving to the minus direction along the x-axis. That is, it can be said that the movement of the detection target 60 shown in FIG. 24 is the first operation when attention is paid to the times T20 to T22, but cannot be said to be the first motion if attention is paid to the times T20 to T22.

  As illustrated in FIG. 25, when the movement direction identifying unit 20 identifies that the movement direction of the detection target 60 is the upward direction at time T21, the first determination unit 21 determines that the identification result (upward direction) ) As the first history. Subsequently, at time T22, when the movement direction identification unit 20 identifies that the movement direction of the detection target 60 is the right direction, the first determination unit 21 displays the identification result (right direction) in the second history. Hold as. However, when the moving direction specifying unit 20 specifies that the moving direction of the detection target object 60 is the left direction at time T23, the first determining unit 21 clears the history information. In the first determination unit 21, the order in which the first history is the upward direction, the second history is the right direction, and the third history is the left direction is any of the multiple types of orders shown in FIG. Therefore, the operation performed by the detection object 60 is determined not to be the first operation, and the history information is cleared.

  In other words, the first determination unit 21 determines that the combination of the current order of the stored history information and the movement direction specified this time by the movement direction specification unit 20 is a predetermined order used for detecting the first action. The history information is updated when it is included in the part starting from the head, and the combination of the current order indicated by the history information and the moving direction specified this time by the moving direction specifying unit 20 is used for detecting the first action. When it is not included in the part starting from the top in the predetermined order, the history information is cleared. As described above, the first determination unit 21 clears the history information when the possibility that the history information indicates the predetermined order is eliminated, and the next result specified by the movement direction specifying unit 20 is a new history. It can be held as information. As a result, the detection accuracy of the first motion of the first motion detector 16 is improved.

<Flow of processing in first determination unit>
FIG. 26 is a diagram for explaining the flow of processing in the first determination unit 21. The flow of processing in the first determination unit 21 will be described below with reference to FIG.

  As FIG. 26 shows, the 1st determination part 21 acquires the specific result in the moving direction specific | specification part 20 first (step S50). Subsequently, the first determination unit 21 determines whether history information is held (step S51). That is, the first determination unit 21 determines whether the movement direction specified by the movement direction specification unit 20 in the past is held. When the history information is not held (No in step S51), the first determination unit 21 holds the moving direction acquired in step S50 as the first history (step S52), and the first motion detection unit 16 The process ends (step S53).

  On the other hand, when the history information is held (Yes in step S51), the first determination unit 21 determines that the combination of the order indicated by the history information and the movement direction identified by the movement direction identification unit 20 is the first. It is determined whether it is included in a portion starting from the beginning in a predetermined order used for detecting one operation (step S54). 27 and 28 show details of the processing in step S54.

  As shown in FIG. 27, first, the first determination unit 21 determines whether or not the movement direction identified by the movement direction identification unit 20 is a downward direction (step S150). If the movement direction identified by the movement direction identification unit 20 is not downward (No in step S150), the first determination unit 21 determines whether the movement direction identified by the movement direction identification unit 20 is the right direction. (Step S160). On the other hand, when the movement direction identified by the movement direction identification unit 20 is the downward direction (Yes in step S150), the first determination unit 21 holds the right direction as the first history, and the second It is determined whether the fourth history is held (step S151). In step S151, the first determination unit 21 determines whether or not the history information may indicate a predetermined order of No2 shown in FIG. When the right direction is held as the first history and the second to fourth histories are not held (Yes in Step S151), the first determination unit 21 determines the order indicated by the history information and the movement direction. Assuming that the combination with the moving direction specified by the specifying unit 20 is included in the part starting from the beginning of the predetermined order used for detecting the first action, the process of step S54 is terminated and the process proceeds to step S56 (step S152 ).

  On the other hand, when the moving direction held as the first history is not rightward or when at least one of the second to fourth histories is held (No in step S151), the first determination unit 21 It is determined whether the left direction is held as the first history and whether the second to fourth histories are held (step S153). In step S153, the first determination unit 21 determines whether or not the history information may indicate a predetermined order of No. 8 shown in FIG. When the left direction is held as the first history and the second to fourth histories are not held (Yes in Step S153), the first determination unit 21 ends the process of Step S54, The process proceeds to S56 (step S152).

  When the movement direction held as the first history is not the left direction, or when at least one of the second to fourth histories is held (No in step S153), the first determination unit 21 It is determined whether the upward direction is held as one history, the right direction is held as the second history, and the third to fourth histories are not held (step S154). In step S154, the first determination unit 21 determines whether or not the history information may indicate a predetermined order of No1 illustrated in FIG. When the first direction is held as the first history, the right direction is held as the second history, and the third to fourth history is not held (Yes in step S154), the first determination unit 21 ends the process of step S54 and proceeds to step S56 (step S152).

  When the moving direction held as the first history is not upward, the moving direction held as the second history is not rightward, or when at least one of the third to fourth histories is held (step) No in S154), the first determination unit 21 determines whether the up direction is held as the first history, the left direction is held as the second history, and the third to fourth history is not held. Determination is made (step S155). In step S155, the first determination unit 21 determines whether or not the history information may indicate a predetermined order of No. 7 shown in FIG. When the first direction is held as the first history, the left direction is held as the second history, and the third to fourth histories are not held (Yes in step S155), the first determination unit 21 ends the process of step S54 and proceeds to step S56 (step S152).

  If the moving direction held as the first history is not upward, the moving direction held as the second history is not left, or at least one of the third to fourth histories is held (step No in S155), the first determination unit 21 holds the left direction as the first history, holds the upward direction as the second history, holds the right direction as the third history, It is determined whether a history is retained (step S156). In step S156, the first determination unit 21 determines whether or not the history information may indicate a predetermined order of No4 shown in FIG. When the left direction is held as the first history, the upward direction is held as the second history, the right direction is held as the third history, and the fourth history is not held (step S156) In step S152, the first determination unit 21 ends the process of step S54 and proceeds to step S56.

  The moving direction held as the first history is not left, the moving direction held as the second history is not upward, the moving direction held as the third history is not right, or the fourth history is If it is held (No in step S156), the first determination unit 21 holds the right direction as the first history, holds the upward direction as the second history, and left as the third history. It is determined whether the direction is held and the fourth history is not held (step S157). In step S157, the first determination unit 21 determines whether or not the history information may indicate a predetermined order of No. 6 shown in FIG. When the right direction is held as the first history, the upward direction is held as the second history, the left direction is held as the third history, and the fourth history is not held (step S157). In step S152, the first determination unit 21 ends the process of step S54 and proceeds to step S56.

  The movement direction held as the first history is not right, the movement direction held as the second history is not upward, the movement direction held as the third history is not left, or the fourth history is If it is held (No in step S157), the first determination unit 21 uses the combination of the order indicated by the history information and the movement direction identified by the movement direction identification unit 20 to detect the first action. The processing in step S54 is terminated, assuming that it is not included in the part starting from the top in the predetermined order to be used, and the process proceeds to step S55 (step S158).

  Thus, when the moving direction specified by the moving direction specifying unit 20 is the downward direction, the first determination unit 21 determines the order of the moving directions indicated by the history information when the downward moving direction is specified. However, in the order of the moving direction indicated by the predetermined order, it is determined whether or not it matches the portion from the head to the moving direction immediately before the moving direction indicates the downward direction. The determination is performed one by one with respect to a plurality of predetermined orders included in the downward movement direction in the second to fourth histories. That is, the first determination unit 21 determines whether or not the history information may indicate any of a plurality of predetermined orders included in the downward movement direction in the second to fourth histories.

  In the above description, the case where the movement direction identified by the movement direction identification unit 20 is the downward direction has been described. However, the movement direction identified by the movement direction identification unit 20 is the right direction (Yes in step S160), the upward direction ( Even in the case of the left direction (Yes in step S180 in FIG. 28) and the left direction (Yes in step S170 in FIG. 28), the first determination unit 21 performs processing in the same way.

  More specifically, when the movement direction identified by the movement direction identification unit 20 is the right direction (Yes in step S160), the first determination unit 21 determines that the history information is a predetermined No. 1 shown in FIG. Whether there is a possibility of indicating the order (step S161), whether the history information may indicate predetermined information No5 shown in FIG. 23 (step S162), and whether the historical information is No4 predetermined shown in FIG. Whether there is a possibility of indicating information (step S163), whether the history information may indicate predetermined information No8 shown in FIG. 23 (step S164), and whether the historical information is predetermined No3 shown in FIG. It is determined in turn one by one whether there is a possibility of indicating information (step S165) and whether the history information may indicate predetermined information of No. 7 shown in FIG. 23 (step S166). .

  Similarly, when the movement direction identified by the movement direction identification unit 20 is upward (Yes in step S170), the first determination unit 21 indicates the predetermined information No. 4 shown in FIG. There is a possibility (step S171), history information may indicate the predetermined information No6 shown in FIG. 23 (step S172), and the history information indicates the predetermined information No3 shown in FIG. There is a possibility (step S173), the history information may indicate the predetermined information of No5 shown in FIG. 23 (step S174), and the history information indicates the predetermined information of No2 shown in FIG. It is determined in turn one by one whether there is a possibility (step S175) and whether the history information may indicate the predetermined information No. 8 shown in FIG. 23 (step S176).

  Similarly, when the movement direction identified by the movement direction identification unit 20 is the left direction (Yes in step S180), the first determination unit 21 indicates the predetermined information No3 shown in FIG. There is a possibility (step S181), whether the history information may indicate the predetermined information No7 shown in FIG. 23 (step S182), and the history information indicates the predetermined information No2 shown in FIG. There is a possibility (step S183), whether the history information may indicate the predetermined information of No6 shown in FIG. 23 (step S184), and the history information indicates the predetermined information of No1 shown in FIG. It is determined in turn one by one whether there is a possibility (step S185) and whether the history information may indicate the predetermined information No5 shown in FIG. 23 (step S186).

  Further, when the moving direction specified by the moving direction specifying unit 20 does not apply to any of the downward direction, the right direction, the upward direction, and the left direction (that is, when the moving direction is not specified by the moving direction specifying unit 20). The first determination unit 21 ends the operation of the first operation detection unit 16 (step S190).

  Returning to FIG. 26, when the combination of the order indicated by the history information and the movement direction specified by the movement direction specifying unit 20 is not included in the part starting from the beginning of the predetermined order used for detecting the first action. (No in step S54), there is no possibility that the history information indicates the predetermined order used for the detection of the first motion, so the first determination unit 21 clears the history information (step S55), and the first motion detection unit The process of 16 is finished (step S53).

  On the contrary, when the combination of the order indicated by the history information and the moving direction specified by the moving direction specifying unit 20 is included in the part starting from the beginning of the predetermined order used for detecting the first action (step S54). Yes), since the history information may indicate the predetermined information, the first determination unit 21 updates the history information (step S56).

  Then, the first determination unit 21 determines whether the history information updated in step S55 indicates a predetermined order used for detection of the first action (step S57). If the history information updated in step S55 does not indicate the predetermined order used for detecting the first action (No in step S57), it cannot be said that the detection target 60 is performing the first action. The first determination unit 21 ends the processing of the first determination unit 21 without doing anything. On the other hand, when the history information updated in step S55 indicates the predetermined order used for detecting the first action (Yes in step S57), the first determination unit 21 determines that the detection target 60 is the first object. It is detected that the operation is performed (step S58), and the process of the first determination unit 21 is terminated. The first operation detected in step S58 is sent to the specifying unit 15 as a provisional detection result.

<2-5. Second motion detection unit>
<About processing performed in the second motion detection unit>
As described above, the second motion detector 17 detects the second motion as illustrated in FIG. 6 based on one table. More specifically, the second motion detection unit 17 detects the second motion (left-right motion) in which the detection target 60 moves along the x axis based on the first table updated by the table update unit 11. To do. The second motion detection unit 17 detects the second motion (vertical motion) in which the detection target 60 moves along the y axis based on the second table updated by the table update unit 11. The second motion detection unit 17 detects the second motion (far-near motion) in which the detection target 60 moves along the z-axis based on the third table updated by the table update unit 11.

  Similar to the movement direction identification unit 20, the second motion detection unit 17 has the number of changes held in the table updated by the table update unit 11 larger than the third threshold and the cumulative change held in the table. When the amount is larger than the fourth threshold, the detection target 60 is moving in the direction indicated by the change direction held in the table (that is, the change direction in which the detection target 60 is held in the table). It is determined that the second operation is performed in the direction indicated by. In the processing of the second motion detection unit 17, the point that differs greatly from the processing in the movement direction identification unit 20 is the threshold value used for the processing. When the detection target 60 performs the second operation, the detection target 60 often moves in the same direction for a longer time and a longer distance than when performing the rotation operation. Therefore, the third threshold is set to a value larger than the first threshold described above. Similarly, the fourth threshold value is set to a value larger than the second threshold value already described. As an example, 12 [times] is adopted as the third threshold, and 50 [mm] is adopted as the fourth threshold. The third threshold value and the fourth threshold value are selected in accordance with the usage application of the gesture detection device 1 as in the case of the first threshold value and the second threshold value described above.

<Flow of processing in second motion detection unit>
FIG. 29 is a diagram for explaining processing in the second motion detection unit 17. FIG. 29 shows a case where the second motion detection unit 17 detects a second motion in which the detection target 60 moves leftward and a second motion in which it moves rightward based on the first table.

  In the following description, the second motion detection unit 17 will be described by taking as an example the case where the second motion detection unit 17 detects the second motion (left-right motion) in which the detection target 60 moves along the x axis. When the detection unit 17 detects the second operation (vertical operation) in which the detection target 60 moves along the y-axis, and the second operation (perspective operation) in which the detection target 60 moves along the z-axis. The case can be considered similarly.

  First, the second motion detection unit 17 acquires a table used for detection of the second motion (step S60). Here, the second motion detection unit 17 acquires the first table updated by the table update unit 11 in order to detect the second motion (left-right motion) in which the detection target 60 moves along the x axis.

  Next, the second motion detection unit 17 determines whether or not the number of changes held in the first table acquired in Step S60 is greater than a third threshold (Step S61). When the number of changes held in the first table acquired in step S60 is smaller than the third threshold or the same value as the third threshold (No in step S61), ), The processing of the second motion detection unit 17 is terminated, assuming that the detection target 60 is not moving left and right. On the other hand, when the number of changes held in the first table acquired in step S60 is larger than the third threshold (Yes in step S61), the second motion detection unit 17 is held in the first table. It is determined whether the accumulated change amount is larger than the fourth threshold value (step S62). Note that the second motion detection unit 17 according to the present embodiment moves the detection target 60 left and right when the number of changes held in the first table acquired in step S60 is the same value as the third threshold. Judged as not operating. However, the second motion detection unit 17 may proceed to step S62 when the number of changes held in the first table acquired in step S60 is the same value as the third threshold value.

  In step S62, if the cumulative change amount stored in the first table acquired in step S60 is smaller than the fourth threshold value or the same value as the fourth threshold value (No in step S62), the second operation The detection unit 17 ends the process of the second motion detection unit 17 assuming that the detection target 60 is not performing the left-right motion. On the other hand, when the cumulative change amount held in the first table acquired in step S60 is larger than the fourth threshold value (Yes in step S62), the second motion detection unit 17 holds it in the first table. It is determined whether the change direction to be performed is the right direction (plus direction) (step S63). Note that the second motion detection unit 17 according to the present embodiment determines that the detection object 60 is in the case where the cumulative change amount stored in the first table acquired in step S60 is the same value as the fourth threshold value. It is determined that the left / right movement is not performed. However, the second motion detection unit 17 may proceed to step S63 when the cumulative change amount stored in the first table acquired in step S60 is the same value as the fourth threshold value.

  When the change direction held in the first table acquired in step S60 is not the right direction (No in step S63), the second motion detection unit 17 performs the second motion in which the detection target 60 moves to the left. It is detected that the process is being performed (step S64), and the process of the second motion detection unit 17 is terminated. On the other hand, when the change direction held in the first table acquired in Step S60 is the right direction (Yes in Step S63), the second motion detection unit 17 moves the detection object 60 in the right direction. It is detected that two operations are being performed (step S65), and the processing of the second operation detector 17 is terminated. Here, the second operation detected in step S64 and step S65 is sent to the specifying unit 15 as a provisional detection result.

  As described above, the second motion detection unit 17 can detect the second motion by performing simple processing using information stored in one table updated by the table update unit 11. As a result, the gesture detection device 1 can detect the second action with a simple process, and the number of types of gestures that can be detected by the gesture detection device 1 increases, thereby improving the convenience of the gesture detection device 1. improves.

  In the example shown in FIG. 29, the second motion detection unit 17 uses the three pieces of information of the number of changes, the accumulated change amount, and the change direction held in the table to cause the detection target 60 to perform the second motion. Whether or not it is going is detected. However, the second motion detection unit 17 performs the detection object 60 using the number of changes and the change direction held in the table, similarly to the first motion detection unit 16 (movement direction specifying unit 20) described above. The second operation may be detected, or the second operation performed by the detection target 60 may be detected using the cumulative change amount and the change direction held in the table.

  In addition, when the second motion detection unit 17 detects a plurality of types of second motions, the second motion detection unit 17 repeatedly performs the processing illustrated in FIG. 29. For example, the second motion detection unit 17 performs the left-right motion and the perspective motion. When detecting, the 2nd operation | movement detection part 17 should just perform a detection process using a 3rd table, after performing a detection process using a 1st table.

<2-6. Third motion detection unit>
<About processing performed in the third motion detection unit>
As described above, the third motion detector 18 detects the third motion illustrated in FIG. 7 based on one table. More specifically, the third motion detection unit 18 detects a third motion in which the detection target 60 moves a short distance alternately in the plus direction and the minus direction along the x axis based on the first table. In addition, the third motion detection unit 18 detects a third motion in which the detection object 60 moves a short distance alternately in the plus direction and the minus direction along the y axis based on the second table. In addition, the third motion detection unit 18 detects a third motion in which the detection object 60 moves a short distance alternately in the plus direction and the minus direction along the z axis based on the third table.

  FIG. 30 is a diagram illustrating a configuration of the third motion detection unit 18. As illustrated in FIG. 30, the third motion detection unit 18 includes a change amount determination unit 25, a first measurement unit 26, and a second determination unit 27. The third operation is an operation in which the detection target 60 moves along a certain coordinate axis alternately in a short distance in the plus direction and the minus direction. Therefore, in the third motion detection unit 18, the change amount determination unit 25 first determines whether or not the detection target 60 has moved a short distance. Subsequently, the first measurement unit 26 measures (holds) the number of times that the change amount determination unit 25 determines that the detection target 60 has moved a short distance. Then, based on the measurement result of the first measurement unit 26, more specifically, when it is determined that the detection object 60 has moved a short distance more than a predetermined number of times, the second determination unit 27 determines that the detection object 60 is It is determined that the third operation has been performed.

  Further, as described above, the coordinate input to the gesture detection device 1 this time with respect to the change direction held in the table held in the table holding unit 12 and the coordinate value input to the gesture detection device 1 last time. When the notification that the direction of the value change is opposite is received from the table update unit 11, the third motion detection unit 18 performs a detection process (see step S22 in FIG. 10). Based on the notification from the table update unit 11, the third motion detection unit 18 performs the detection process only when the detection object 60 has moved in the same direction, and the detection object 60 moves in the same direction. Determine if the movement is moving over a short distance. Therefore, each time a coordinate value is input to the gesture detection device 1, the amount of processing performed by the gesture detection device 1 can be reduced as compared with the case where the third motion detection unit 18 performs detection processing.

  FIG. 31 is a diagram illustrating a detection result of the position detection device 100 when the detection target 60 performs the third operation along the x-axis. From time t1 to t5, the x coordinate value changes in the plus direction. In the first table updated by the table updating unit 11 at time t5, “4” is held as the number of changes, “n1” is held as the cumulative change amount, and “plus direction” is held as the change direction. The

  Subsequently, at time t6, unlike the time t5, the x-coordinate value has changed in the negative direction, so the table update unit 11 notifies the third motion detection unit 18 and initializes the first table. The third motion detection unit 18 uses the first table before being initialized by the table update unit 11 (that is, the first table updated by the table update unit 11 at time t5) to detect the third motion. I do.

  Thereafter, the x-coordinate value changes in the minus direction from time t6 to t10. In the first table updated by the table updating unit 11 at time t10, “4” is held as the number of changes, “n2” is held as the cumulative change amount, and “minus direction” is held as the change direction.

  Since the x-coordinate value has changed in the positive direction at time t11, the table update unit 11 notifies the third motion detection unit 18 and initializes the first table. On the other hand, the third motion detection unit 18 uses the first table before being initialized by the table update unit 11 (that is, the first table updated by the table update unit 11 at time t10). Perform detection processing.

<Processing flow in the third motion detection unit>
FIG. 32 is a diagram for explaining processing in the third motion detection unit 18. FIG. 32 shows a case where the third motion detection unit 18 detects a third motion in which the detection target 60 moves alternately in the plus direction and the minus direction along the x axis based on the first table. . The processing in the third motion detection unit 18 will be described below with reference to FIGS.

  In the following description, the case where the third motion detection unit 18 detects the third motion in which the detection target 60 alternately moves in the plus direction and the minus direction along the x axis will be described as an example. When the third motion detection unit 18 detects the third motion in which the detection target 60 moves alternately in the positive direction and the negative direction along the y axis, and the detection target 60 moves in the positive direction and the negative direction along the z axis. The same can be applied to the case where the third motion that moves alternately in the direction is detected.

  First, when a notification is received from the table update unit 11 (step S70), the change amount determination unit 25 acquires the first table before being initialized by the table update unit 11 (step S71). The table updating unit 11 initializes the table immediately after the notification. Therefore, the 3rd operation | movement detection part 18 must perform the process of step S71 immediately after receiving notification by step S70. However, the processing after obtaining the first table before being updated by the table updating unit 11 only needs to be completed before the processing in the specifying unit 15 starts. Therefore, when the third motion detection unit 18 obtains the first table before being updated by the table update unit 11 from the table holding unit 12, the subsequent processing is finished with other processing such as processing in the table update unit 11. It may be done later.

  Further, unlike the above example, the table holding unit 12 may hold a past table. In this case, after the processing in the table update unit 11 is finished, the change amount determination unit 25 can acquire the table before being initialized by the table update unit 11 from the table holding unit 12.

  Subsequently, the change amount determination unit 25 determines whether the number of changes held in the first table acquired in step S71 is larger than the fifth threshold and smaller than the sixth threshold (step S72). The change amount determination unit 25 determines whether the number of changes held in the table acquired in step S71 is greater than the fifth threshold value in order to determine that the operation having an operation time that is too short is a movement of the third operation. Is judged. As the fifth threshold, for example, 3 [times] is adopted. Further, the change amount determination unit 25 determines whether an operation having a short operation time has been performed by determining whether the number of changes held in the table acquired in step S71 is smaller than the sixth threshold. . When it is determined that an operation with a short operation time has been performed, the change amount determination unit 25 determines that the detection target 60 has moved a short distance. For example, 10 [times] is adopted as the sixth threshold. The values of the fifth threshold value and the sixth threshold value are selected according to the usage application of the gesture detection device 1 or the like.

  When the number of changes held in the first table acquired in step S71 is smaller than the fifth threshold, the same value as the fifth threshold, larger than the sixth threshold, or the same value as the sixth threshold (No in step S72), the change amount determination unit 25 determines that the detection target 60 is not performing the third operation, and ends the process of the third operation detection unit 18.

  Conversely, when the number of changes held in the first table acquired in step S71 is larger than the fifth threshold and smaller than the sixth threshold (Yes in step S72), the change amount determination unit 25 It is determined whether the cumulative change amount stored in the first table acquired in step S71 is greater than a seventh threshold (step S73). Note that, in the change amount determination unit 25 according to the present embodiment, the number of changes held in the first table acquired in step S71 is the same value as the fifth threshold value or the same value as the sixth threshold value. In this case, it is determined that the detection target 60 is not performing the third operation. However, if the number of changes held in the first table acquired in step S71 is the same value as the fifth threshold value or the same value as the sixth threshold value, the change amount determination unit 25 returns to step S73. You may go on.

  In step S <b> 73, the change amount determination unit 25 determines whether the distance that the detection target 60 has moved is longer than the distance corresponding to the seventh threshold value. When the detection target 60 is a human hand, for example, the distance to move the hand greatly varies depending on the individual difference of the person performing the third operation. Therefore, in step S73, the change amount determination unit 25 does not determine an operation at a too short distance as a movement of the third operation, so only the cumulative change amount held in the table is larger than the seventh threshold value. It is not determined whether the cumulative change amount stored in the table is smaller than a predetermined value. In addition, since the third operation is an operation in which the detection object 60 moves a short distance compared to the first operation and the second operation, the seventh threshold used in step S73 is the second threshold described above. A value smaller than the threshold and the fourth threshold is adopted. For example, 20 [mm] is adopted as the seventh threshold value. The value of the seventh threshold is selected according to the usage application of the gesture detection device 1 or the like.

  When the cumulative change amount stored in the first table acquired in step S71 is smaller than the seventh threshold value or the same value as the seventh threshold value (No in step S73), the change amount determination unit 25. Determines that the detection target 60 is not performing the third motion, and ends the processing of the third motion detector 18. On the other hand, when the accumulated change amount stored in the first table acquired in step S71 is larger than the seventh threshold value (Yes in step S73), the change amount determination unit 25 indicates that the detection target 60 is a short distance. Is added, and +1 is added to the measurement result held by the first measurement unit 26 (step S74). Note that the change amount determination unit 25 of the present embodiment determines that the detection object 60 is the first value when the accumulated change amount held in the first table acquired in step S71 is the same value as the seventh threshold value. It is determined that 3 operations are not performed. However, the change amount determination unit 25 may proceed to step S74 when the accumulated change amount held in the first table acquired in step S71 is the same value as the seventh threshold value.

  Subsequently, the second determination unit 27 determines whether the measurement result of the first measurement unit 26 is larger than the eighth threshold (step S75). The second determination unit 27 determines whether or not the detection object 60 has moved a short distance more than a predetermined number of times (eighth threshold) in the process of step S75. For example, 5 [times] is adopted as the eighth threshold. The value of the eighth threshold is selected according to the usage application of the gesture detection device 1 or the like.

  When the measurement result in the first measurement unit 26 is smaller than the eighth threshold value or the same value as the value of the eighth threshold value (No in step S75), the second determination unit 27 detects the detection target object. 60 determines that the third operation is not performed, and ends the processing of the third operation detection unit 18. On the contrary, when the measurement result in the first measurement unit 26 is larger than the eighth threshold value (Yes in Step S75), the second determination unit 27 confirms that the detection target 60 has performed the third operation. It detects (step S76), and the process of the 3rd operation | movement detection part 18 is complete | finished. Here, the third operation detected in step S76 is sent to the specifying unit 15 as a provisional detection result. Note that the second determination unit 27 according to the present embodiment does not perform the third operation of the detection target 60 when the measurement result of the first measurement unit 26 is the same value as the eighth threshold value. Is determined. However, the second determination unit 27 may determine that the detection target 60 has performed the third operation when the measurement result of the first measurement unit 26 is the same value as the eighth threshold value.

  As described above, in the third motion detection unit 18, whether or not the detection target 60 has moved a short distance more than a predetermined number of times (eighth threshold) using one table updated by the table update unit 11. By performing such a simple process, the third operation can be detected. As a result, the gesture detection apparatus 1 can detect the third action with a simple process. Moreover, the convenience of the gesture detection apparatus 1 is improved by increasing the types of gestures that can be detected by the gesture detection apparatus 1.

  Further, in the example shown in FIG. 32, the third motion detection unit 18 uses the three pieces of information of the number of changes, the cumulative change amount, and the change direction held in the table to cause the detection target 60 to perform the third motion. Whether or not it is going is detected. However, like the first motion detection unit 16 and the second motion detection unit 17, the third motion detection unit 18 performs the third motion performed by the detection target 60 using the number of changes and the change direction held in the table. May be detected, or the third action performed by the detection object 60 may be detected using the accumulated change amount and change direction held in the table.

  When the third motion detection unit 18 detects the third motion performed by the detection target 60 using the cumulative change amount and the change direction held in the table, the third motion detection unit 18 sets the cumulative change amount. Based on this, it must be determined whether or not the detection object 60 has moved a short distance. For this reason, in step S73 of FIG. 32, it is necessary to determine whether or not the cumulative change amount held in the table is larger than the seventh threshold and smaller than the ninth threshold. However, as described above, when the detection target 60 is a human hand, the distance to move the hand greatly varies depending on the individual difference of the person performing the third operation. Therefore, in this case, the detection accuracy of the third motion in the third motion detector 18 may be deteriorated.

<2-7. Specific part>
The specifying unit 15 is temporarily detected by the detection result temporarily detected by the first motion detection unit 16, the detection result temporarily detected by the second motion detection unit 17, and the third motion detection unit 18. Based on the detection result, the gesture of the detection target 60 is specified. FIG. 33 is a diagram for explaining the processing in the specifying unit 15.

  First, the identifying unit 15 determines whether the first motion detection unit 16 has detected the first motion (step S80). When the first motion is detected by the first motion detector 16 (Yes in step S80), the identifying unit 15 identifies that the first motion is a gesture of the detection target 60 (step S81). For example, when the first motion detection unit 16 detects the first motion that rotates counterclockwise, the specifying unit 15 determines that the first motion that rotates counterclockwise is the gesture of the detection target 60. To be identified. The gesture specified in step S <b> 81 is output to the outside of the gesture detection device 1 as a detection result of the gesture detection device 1. The specifying unit 15 then detects the detection results detected by the motion detection unit (more specifically, the first motion detected by the first motion detection unit 16, the second motion detected by the second motion detection unit 17, and the second motion The third action detected by the three action detector 18, the measurement result held by the first measurement part 26, and the history information held by the first determination part 21 are cleared (step S 82). In step S82, the identification unit 15 clears various information, so that the next time the coordinate value indicating the position of the detection target 60 is input to the gesture detection device 1, the gesture detection device 1 performs the next detection. Processing can be done immediately.

  Returning to step S80, if the first action is not detected by the first action detector 16 (No in step S80), the identifying part 15 determines whether the third action detector 18 detects the third action. Is determined (step S83).

  When the third motion is detected by the third motion detector 18 (Yes in step S83), the identifying unit 15 identifies that the third motion is a gesture of the detection target 60 (step S84). For example, when the third motion detection unit 18 detects the third motion in which the detection target 60 moves alternately in the plus direction and the minus direction along the z-axis, the identifying unit 15 The third action in which the object 60 moves alternately a short distance in the plus direction and the minus direction along the z axis is specified as the gesture of the detection object 60. The gesture specified in step S84 is output to the outside of the gesture detection device 1 as a detection result of the gesture detection device 1. And the specific | specification part 15 clears the detection result detected by the operation | movement detection part, the measurement result which the 1st measurement part 26 hold | maintains, and the log | history information which the 1st determination part 21 hold | maintains (step S82).

  Returning to step S83, if the third action is not detected by the third action detecting unit 18 (No in step S83), the specifying unit 15 includes the history of the first determining unit 21 included in the first action detecting unit 16. It is determined whether the information is retained (step S85).

  If the first determination unit 21 holds history information (Yes in step S85), the specifying unit 15 ends the process of the gesture detection unit 13 (step S86). Since the first determination unit 21 holds the history information, there is a possibility that the history information indicates a predetermined order used for detecting the first motion (that is, the gesture of the detection target 60 is the first motion). It can be understood that the first determination unit 21 determines that there is a possibility of the occurrence). Therefore, in this case, the specifying unit 15 ends the process without specifying the gesture of the detection target 60.

  As described above, the threshold of the movement of the detection target 60 identified by the movement direction identification unit 20 and the movement of the detection target 60 detected by the second motion detection unit 17 are different. Therefore, for example, even when the detection target 60 is rotating, if the movement of the detection target 60 is large, the second movement detection unit 17 may detect the second movement.

  Therefore, as illustrated in FIG. 33, the specifying unit 15 first determines whether or not the first motion detection unit 16 has detected the first motion. That is, in the present embodiment, even when the motion detection unit 14 detects both the first motion and the second motion, the first motion is specified as the gesture of the detection target 60. Even when the first action is not detected by the first action detector 16, if the first determination unit 21 holds the history information, the specifying unit 15 determines the detection object 60. Do not specify gestures. Therefore, it can suppress that 2nd operation | movement is detected by the gesture detection apparatus 1 in the middle of the detection target object 60 performing 1st operation | movement. As a result, the detection accuracy of the gesture detection device 1 can be improved.

  In addition, when the third motion is detected by the third motion detector 18 while the detection target 60 is performing the first motion, or when the detection target 60 is performing the third motion, There is no case where the first operation is detected by the one operation detector 16. Therefore, before the determination (step S80) as to whether or not the first motion detector 16 has detected the first motion, the determination as to whether or not the third motion detector 18 has detected the third motion (step S80). Even if S83) is performed, the specifying result of the specifying unit 15 does not change. Therefore, unlike the example shown in FIG. 33, the process of step S83 may be performed before the process of step S80.

  Returning to step S85, when the first determination unit 21 does not hold the history information (No in step S85), the specifying unit 15 determines whether the second operation detection unit 17 has detected the second operation. (Step S87).

  If the second action is not detected by the second action detector 17 (No in step S87), there is no gesture detected by the action detector 14; The process ends (step S86). On the other hand, when the second motion is detected by the second motion detector 17 (Yes in step S87), the specifying unit 15 specifies that the second motion is a gesture of the detection target 60 (step). S88). For example, when the second motion in which the detection target 60 moves upward is detected by the second motion detection unit, the specifying unit 15 performs the second motion in which the detection target 60 moves upward, The gesture of the detection target 60 is specified. The gesture specified in step S88 is output to the outside of the gesture detection device 1 as a detection result of the gesture detection device 1. Then, the specifying unit 15 obtains the detection result detected by the motion detection unit (more specifically, the second motion detected by the second motion detection unit 17) and the measurement result held by the first measurement unit 26. Clear (step S89).

  When the third motion is detected by the third motion detection unit 18 while the detection target 60 is performing the second motion, or when the detection target 60 is performing the third motion, the second motion is detected. There is no case where the second motion is detected by the motion detector 17. Therefore, even if the process after step S85 is performed before the determination (step S83) whether or not the third operation detection unit 18 detects the third operation, the specification result of the specification unit 15 does not change. Therefore, unlike the example shown in FIG. 33, the processing after step S85 may be performed before the processing of step S83.

<2-8. Modification of First Embodiment>
FIG. 34 is a diagram illustrating a part of a plurality of functional blocks formed in the control unit 10 according to the present modification. As shown in FIG. 34, the control unit 10 according to the present modification includes a coordinate value comparison unit 30, unlike the control unit 10 according to the first embodiment. The coordinate value comparison unit 30 monitors the coordinate value indicating the position of the detection target 60 input to the gesture detection device 1, and when the coordinate value has not changed, the table update unit 11 and the second motion detection unit ( Notify the motion detector 14).

  FIG. 35 is a diagram for explaining processing of the table update unit 11, the second motion detection unit 17, and the coordinate value comparison unit 30. Processing performed by the table update unit 11, the second motion detection unit 17, and the coordinate value comparison unit 30 according to this modification will be described below with reference to FIGS.

  First, the coordinate value comparison unit 30 determines whether the x coordinate value input to the gesture detection device 1 this time has changed from the x coordinate value input to the gesture detection device 1 last time (step S90a). When the x coordinate value input to the gesture detection device 1 this time has changed from the previous x coordinate value input to the gesture detection device 1 (Yes in step S90a), the table update unit 11 updates the first table. (Step S1a), the second motion detector 17 detects the second motion using the first table updated in Step S1a (Step S3a).

  On the other hand, when the x coordinate value input to the gesture detection device 1 this time has not changed from the previous x coordinate value input to the gesture detection device 1 (No in step S90a), the table updating unit 11 performs the first table. Will not be updated. And the 2nd operation | movement detection part 17 does not perform the detection process which uses a 1st table.

  When the detection target 60 is not moving along the x-axis, even if the table update unit 11 performs the update process of the first table, the information held by the first table held by the table holding unit 12 does not change. In addition, when the detection target 60 is not moving along the x axis, the second motion detection unit 17 does not detect the second motion of the detection target 60 moving along the x axis. Therefore, in this modification, when the coordinate value comparison unit 30 determines that the x coordinate value input to the gesture detection device 1 this time has not changed from the x coordinate value input to the gesture detection device 1 last time. The coordinate value comparison unit 30 does not perform the update process of the first table using the x coordinate value input to the gesture detection device 1 in the table update unit 11 this time, and causes the second motion detection unit 17 to perform the first operation. The detection process using the table is not performed. As a result, in the gesture detection device 1 according to the present modification, the amount of processing performed by the gesture detection device 1 when the detection target 60 is not moving can be reduced.

  When the coordinate value comparison unit 30 is not provided in the control unit 10, the table update unit 11 and the second motion detection unit 17 independently perform the current gesture when reducing the processing when the detection target 60 is not moving. It is necessary to compare the x-coordinate value input to the detection device 1 with the x-coordinate value input to the gesture detection device 1 last time to determine whether or not to perform processing. In this case, each of the table update unit 11 and the second motion detection unit 17 performs the same processing (the x coordinate value input to the gesture detection device 1 this time and the x coordinate value input to the gesture detection device 1 last time). Will be performed). However, as in the present modification, the coordinate value comparison unit 30 monitors the coordinate value indicating the position of the detection target 60 input to the gesture detection device 1, and when there is no change in the coordinate value, that is, the detection target When 60 is not moving, the table update unit 11 and the second motion detection unit 17 do not perform the same process by notifying the table update unit 11 and the second motion detection unit 17.

  Similarly, the coordinate value comparison unit 30 determines whether there is a change between the y coordinate value input to the gesture detection device 1 last time and the y coordinate value input to the gesture detection device 1 this time (step S90b). If there is a change between the y coordinate value input to the gesture detection device 1 last time and the y coordinate value input to the gesture detection device 1 this time (Yes in step S90b), the table update unit 11 performs the second table. (Step S1b), the second motion detector 17 detects the second motion using the second table updated in Step S1b (Step S3b). On the other hand, when there is no change between the y coordinate value input to the gesture detection device 1 last time and the y coordinate value input to the gesture detection device 1 this time (No in step S90b), the table update unit 11 performs the second operation. The table is not updated, and the second motion detection unit 17 does not perform the detection process using the second table.

  Similarly, the coordinate value comparison unit 30 determines whether there is a change between the z coordinate value input to the gesture detection device 1 last time and the z coordinate value input to the gesture detection device 1 this time (step S90c). When there is a change between the z coordinate value input to the gesture detection device 1 last time and the z coordinate value input to the gesture detection device 1 this time (Yes in step S90c), the table update unit 11 performs the third table. (Step S1c), the second motion detector 17 detects the second motion using the third table updated in step S1c (step S3c). On the other hand, when there is no change between the z coordinate value input to the gesture detection device 1 last time and the z coordinate value input to the gesture detection device 1 this time (No in step S90c), the table update unit 11 performs the third operation. The table is not updated, and the second motion detection unit 17 does not perform the detection process using the third table.

<< 3. Second embodiment >>
In the second embodiment, two examples of reducing the processing performed by the gesture detection device 1 when the coordinate value detected by the position detection device 100 does not indicate the position of the detection target 60 will be described.

<First example of the second embodiment>
First, the first example will be described with reference to FIGS. FIG. 36 is a diagram illustrating some of a plurality of functional blocks formed in the control unit 10 according to the first example of the second embodiment. FIG. 37 is a diagram for explaining processing in the control unit 10 according to the first example of the second embodiment.

  As shown in FIG. 36, unlike the above-described first embodiment, the control unit 10 according to the first example of the second embodiment includes a distance specifying unit 31. The distance specifying unit 31 specifies the distance between the detection target 60 and the light receiving surface of the light receiving unit 102 included in the position detection device 100, and the coordinate value input from the position detection device 100 based on the distance is the detection target. It is determined whether or not the position of the object 60 is indicated. Normally, when the detection target 60 performs a gesture, the detection target 60 approaches the light receiving surface of the light receiving unit 102 and performs the gesture. Therefore, when the distance between the detection target 60 and the light receiving surface of the light receiving unit 102 included in the position detection device 100 is long, the coordinate value input to the gesture detection device 1 is the value of the detection target 60 that performs the gesture. It is likely that the location is not shown. Therefore, if the distance specifying unit 31 determines that the coordinate value input from the position detection device 100 does not indicate the position of the detection target 60 to be gestured, the detection target 60 is not present. The table update unit 11 and the gesture detection unit 13 are not processed.

  In this embodiment, since the light receiving surface of the light receiving unit 102 is parallel to the xy coordinate plane, the distance between the detection target 60 and the light receiving surface of the light receiving unit 102 included in the position detection device 100 is the z coordinate value. Can be determined based on Therefore, in the following description, a case where the distance specifying unit 31 determines whether or not the detection target 60 exists using the z coordinate value will be described as an example. However, the coordinate value used for determination by the distance specifying unit 31 varies depending on how the coordinate axes are defined. More specifically, when the light receiving surface of the light receiving unit 102 is perpendicular to the x axis, the distance specifying unit 31 determines whether the distance between the detection target 60 and the light receiving surface of the light receiving unit 102 is based on the x coordinate value. Find the distance. When the light receiving surface of the light receiving unit 102 is perpendicular to the y-axis, the distance specifying unit 31 obtains the distance between the detection target 60 and the light receiving surface of the light receiving unit 102 based on the y coordinate value.

  In the present embodiment, since the light receiving surface of the light receiving unit 102 is included in the xy coordinate plane, the distance between the detection target 60 and the light receiving surface of the light receiving unit 102 is the value of the z coordinate value itself. . Unlike the present embodiment, when the light receiving surface of the light receiving unit 102 is not included in the xy coordinate plane, based on the distance between the xy coordinate plane and the light receiving surface of the light receiving unit 102 and the z coordinate value, The distance between the detection object 60 and the light receiving surface of the light receiving unit 102 can be obtained.

  As shown in FIG. 37, first, the distance specifying unit 31 acquires the z coordinate value input to the gesture detection device 1 (step S110). Subsequently, the distance specifying unit 31 specifies whether the z coordinate value acquired in step S110, that is, whether the distance between the detection target 60 and the light receiving surface of the light receiving unit 102 is smaller than the tenth threshold value (step S111). ). The value of the tenth threshold value can be appropriately changed depending on the installation environment of the position detection device 100 or the like.

  When the z-coordinate value input to the gesture detection device 1 is greater than the tenth threshold value or the same value as the tenth threshold value (No in step S111), the distance specifying unit 31 includes a table updating unit. 11 and the gesture detection unit 13 are not processed, and the process waits for a coordinate value to be input to the gesture detection device 1 (step S112).

  On the other hand, when the z coordinate value input to the gesture detection device 1 is smaller than the tenth threshold value (No in step S111), the distance specifying unit 31 performs processing on the table update unit 11 and the gesture detection unit 13. Let it be done. Specifically, the table update unit 11 updates the table (step S1), the first motion detection unit 16 detects the first motion (step S2), and the second motion detection unit 17 detects the second motion. (Step S3), the third motion detection unit 18 detects the third motion (Step S4), and the specifying unit 15 specifies the gesture of the detection target 60 (Step S5).

  Thus, the distance specifying unit 31 causes the table update unit 11 and the gesture detection unit 13 to perform processing when the distance between the detection target 60 and the light receiving surface of the light receiving unit 102 is larger than the tenth threshold value. Absent. As a result, it is possible to reduce the amount of processing performed by the gesture detection device 1 based on coordinate values that do not indicate the position of the detection target 60.

  It should be noted that the distance specifying unit 31 in the present embodiment assumes that the detection target 60 does not exist and the table updating unit 11 when the z coordinate value input to the gesture detection device 1 is the same value as the tenth threshold value. In addition, the gesture detection unit 13 is not allowed to perform processing. However, when the z coordinate value input to the gesture detection device 1 is the same value as the tenth threshold value, the distance specifying unit 31 determines that the detection target 60 exists and the table update unit 11 and the gesture detection unit 13 may be processed.

<Second example of the second embodiment>
Next, a second example will be described with reference to FIGS. FIG. 38 is a diagram illustrating a part of a plurality of functional blocks formed in the control unit 10 according to the second example of the second embodiment. FIG. 39 is a diagram for explaining processing in the control unit 10 according to the second example of the second embodiment.

  As shown in FIG. 38, unlike the first example of the second embodiment described above, the control unit 10 according to the second example of the second embodiment includes a third determination unit 32. The third determination unit 32 determines whether or not the detection target 60 has existed for a predetermined time or more based on the identification result in the distance identification unit 31. When the detection target 60 has not existed for a predetermined time or longer and the second motion is detected, the second motion is set as the gesture of the detection target 60.

  As shown in FIG. 39, first, the distance specifying unit 31 acquires the z coordinate value input to the gesture detection device 1 (step S110). Subsequently, the distance specifying unit 31 specifies whether the z coordinate value acquired in step S110, that is, whether the distance between the detection target 60 and the light receiving surface of the light receiving unit 102 is smaller than the tenth threshold value (step S111). ).

  If the z-coordinate value acquired in step S110 is greater than the tenth threshold value or the same value as the tenth threshold value (No in step S111), the third determination unit 32 determines that the third determination unit +1 is added to the number of measurements held by 32 (step S113). The number of measurements held by the third determination unit 32 is added every time it is determined in step S111 that the z coordinate value is larger than the tenth threshold value. That is, the number of measurements held by the third determination unit 32 indicates a time during which the detection target 60 for performing the gesture does not exist.

  Subsequently, the third determination unit 32 determines whether or not the number of measurements updated in step S113 is greater than an eleventh threshold (step S114). When the number of measurements updated in step S113 is smaller than the eleventh threshold value or the same value as the eleventh threshold value, that is, when the time when the detection target 60 for performing the gesture does not exist is shorter than the predetermined time. (No in step S114), the third determination unit 32 ends the process (step S112). That is, the third determination unit 32 waits for the next coordinate value to be input to the gesture detection device 1 without performing processing on the table update unit 11 and the gesture detection unit 13.

  On the other hand, if the number of measurements updated in step S113 is greater than the eleventh threshold, that is, if the time when the detection object 60 to be gestured does not exist is longer than the predetermined time (Yes in step S114), the third determination The unit 32 determines whether the second motion is detected by the second motion detector 17 (step S115).

  When the second motion is not detected by the second motion detector 17 (No in step S115), the third determination unit 32 ends the process (step S112). On the other hand, when the second motion is detected by the second motion detector 17 (Yes in step S115), the third determination unit 32 performs the second motion detected by the second motion detector 17. The gesture of the detection target 60 is specified (step S116), the detection result in the motion detection unit 14, the measurement result in the first measurement unit 26, the measurement result in the third determination unit 32, and the first determination unit The history information at is initialized (step S117).

  As described above, when the first determination unit 21 holds history information and the second operation detection unit 17 detects the second operation by the operation of the detection object 60, the specifying unit 15 detects the detection object 60. 60 gestures are not specified. After that, when the detection target 60 (user) ends the operation with the intention of performing the second operation, the gesture detection device 1 remains undetected by the gesture performed by the detection target 60.

  Therefore, in the present embodiment, the third determination unit 32 determines that the time during which the detection target 60 is not present is longer than the predetermined time corresponding to the eleventh threshold, and the second operation detection unit 17 performs the second operation. Is detected as a gesture of the object 60 to be detected. In other words, when the third determination unit 32 determines that the operation of the detection target 60 has ended during the first motion detection, the third determination unit 32 sets the detected second motion as the gesture of the detection target 60. Therefore, unlike the first action and the third action, it is easy to detect the second action that may not be immediately identified as the gesture of the detection target 60 even if it is detected by the second action detector 17. Can do. As a result, the gesture detection device 1 can easily detect the second action.

  Returning to step S111 in FIG. 39, if the z-coordinate value acquired in step S110 is smaller than the tenth threshold value (Yes in step S111), the third determination unit 32 holds the third determination unit 32. The number of measurements is cleared (step S118). And the distance specific | specification part 31 makes a table update part 11 and the gesture detection part 13 perform a process (step S1-step S5). The third determination unit 32 clears the number of measurements when the z-coordinate value acquired in step S110 is smaller than the tenth threshold value, so that the detection target 60 that performs the gesture continuously exists for the number of measurements. Indicates the time when not. There is a possibility that the detection object 60 may temporarily leave the light receiving surface of the light receiving unit 102 during the gesture. Therefore, the third determination unit 32 determines whether or not the operation of the detection target 60 has been completed more accurately by performing determination using the time when the detection target 60 to be gestured is not continuously present. Can be determined.

  As shown in FIG. 38, in the present embodiment, the distance specifying unit 31 and the third determining unit 32 may be collectively referred to as a detection target presence / absence specifying unit 33.

<< 4. Third embodiment >>
In the third embodiment, a case will be described in which the coordinate values detected by the position detection device 100 vary due to the unevenness of the surface of the detection target 60. When the coordinate values detected by the position detection device 100 vary, for example, the gesture is caused by the change in the coordinate values detected by the position detection device 100 even though the detection target 60 is not actually moving. There is a possibility that the detection accuracy of the detection device 1 is lowered.

  However, the amount of change in the coordinate value detected by the position detection device 100 due to the unevenness of the surface of the detection target 60 is small. Therefore, in this Embodiment, the table update part 11 suppresses the fall of the detection accuracy of the gesture detection apparatus 1 due to the unevenness | corrugation of the surface of the detection target object 60 by updating a table by the process demonstrated below. . In addition, about the content demonstrated by 3rd embodiment, it can apply in each of 1st and 2nd embodiment.

  FIG. 40 is a diagram illustrating a process of the table update unit 11 according to the present embodiment, corresponding to the process of the table update unit 11 illustrated in FIG. The difference from the process shown in FIG. 10 is that the process of step S26 is inserted before step S22.

  The process of step S26 is input to the gesture detection device 1 this time with respect to the change direction registered in the first table held in the table holding unit 12 and the x coordinate value input to the gesture detection device 1 last time. This is performed when the direction of change of the x coordinate value is opposite.

  In step S26, the table updating unit 11 determines whether the absolute value | α | of the difference value α obtained in step S11 is larger than a twelfth threshold value. That is, in step S <b> 26, the difference between the x-coordinate value input to the gesture detection device 1 last time and the x-coordinate value input to the gesture detection device 1 this time has occurred due to the unevenness of the surface of the detection target 60. It is judged whether it is a small change. The value of the twelfth threshold is determined by the material of the detection object 60 and the illumination conditions.

  When the absolute value | α | of the value obtained in step S11 is larger than the twelfth threshold value (Yes in step S26), the table updating unit 11 determines that the coordinate value is affected by the unevenness of the surface of the detection target 60. It is determined that it has not changed, a notification is sent to the third motion detector 18 (step S22), and the first table held in the table holder 12 is initialized (step S23).

  On the other hand, when the absolute value | α | of the difference value α obtained in step S11 is smaller than the twelfth threshold value or the same value as the twelfth threshold value (No in step S26), the table update unit 11 determines that the coordinate value has changed due to the influence of the unevenness of the surface of the detection target 60, and ends the process without updating the first table held in the table holding unit 12.

  In this way, the table updating unit 11 differs from the change direction held in the first table in the change direction of the x coordinate value input this time with respect to the x coordinate value input last time and is input last time. When the difference between the x coordinate value and the x coordinate value input this time is smaller than the twelfth threshold value, the first table is not updated. Therefore, the motion detection unit 14 does not perform the detection process based on the first table updated based on the x coordinate value affected by the unevenness of the surface of the detection target 60. As a result, the gesture detection accuracy of the gesture detection device 1 is improved.

  Although description is omitted, the table updating unit 11 performs the same process as described above for the second table and the third table.

<< 5. Fourth embodiment >>
In the fourth embodiment, unlike the third embodiment, the coordinate value input from the position detection device 100 to the gesture detection device 1 is influenced by the illumination unit 101 of the position detection device 100 or the influence of a light source other than the illumination unit 101. The case of variation will be described. When such a light source is a factor, variations in coordinate values detected by the position detection device 100 appear only for a short period.

  Therefore, in this embodiment, by providing an output unit that outputs the median value of the three coordinate values output from the position detection device 100 to the table update unit 11, the detection accuracy of the gesture detection device 1 due to the light source is provided. Suppresses the decline. In addition, about the content demonstrated by 4th embodiment, it can apply in each of 1st-3rd embodiment.

  FIG. 41 is a diagram illustrating a part of a plurality of functional blocks formed in the control unit 10 according to the fourth embodiment. FIG. 42 is a diagram for explaining processing in the control unit 10 according to the fourth embodiment. The processing of the control unit 10 according to the present embodiment will be described below with reference to FIGS. In the example shown below, the case where the x coordinate value is input to the gesture detection device 1 will be described as an example, but the same applies to the case where the y coordinate value and the z coordinate value are input to the gesture detection device 1. Can think.

  As shown in FIG. 41, the control unit 10 according to the present embodiment includes an output unit 35. The output unit 35 receives a coordinate value indicating the position of the detection target 60 output from the position detection device 100. Then, the output unit 35 outputs the median value of the three coordinate values output from the position detection device 100 to the table update unit 11.

  As shown in FIG. 42, the output unit 35 first acquires the x-coordinate value output from the position detection device 100 (step S120). Subsequently, the output unit 35 holds the x coordinate value acquired in step S120 (step S121). Subsequently, the output unit 35 determines whether or not the x coordinate values for three times are held (step S122). If the x-coordinate values for three times are not held (No in step S122), the output unit 35 returns to step S120 and acquires the x-coordinate values output from the position detection device 100 next.

  On the other hand, when the x coordinate value for three times is held (Yes in step S122), the output unit 35 selects the central value among the three x coordinate values (step S123). Then, the table updating unit 11 updates the first table based on the x coordinate value selected in step S123 (step S1a), and the first motion detection unit 16 includes the first table updated in step S1a, Based on the second table or the third table updated by the table update unit 11 before and after step S1a is performed, the first operation is detected (step S2a), and the second operation detection unit 17 is updated in step S1a. The second operation is detected on the basis of the first table (step S3a), and the third operation detector 18 detects the third operation on the basis of the first table updated in step S1a (step S4a). The part 15 detects the gesture of the detection target 60 (step S5).

  Each time three x coordinate values are input to the gesture detection device 1, the output unit 35 outputs the central coordinate value of the three input x coordinate values to the table update unit 11. Therefore, the gesture detection apparatus 1 can detect the gesture of the detection target 60 using coordinate values that are less affected by the light source. Further, the output unit 35 outputs the central value of the three x-coordinate values input to the gesture detection device 1 so that the influence of the light source is small by simple processing without calculating the average value. An x-coordinate value can be output.

  Although the gesture detection device has been described in detail above, the above description is illustrative in all aspects, and the present invention is not limited thereto. The various examples described above can be applied in combination as long as they do not contradict each other. And it is understood that the countless modification which is not illustrated can be assumed without deviating from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Gesture detection apparatus 11 Table update part 12 Table holding part 13 Gesture detection part 14 Motion detection part 20 Movement direction specific | specification part 21 1st determination part 60 Detection target object 100 Position detection apparatus

Claims (19)

The number of times the first coordinate value indicating the position of the detection target object on the first coordinate axis continuously changes in the same direction, and the first coordinate value when the first coordinate value continuously changes in the same direction. Information regarding the first coordinate value is stored, including at least one of the accumulated values of the change amount and a change direction of the first coordinate value when the first coordinate value continuously changes in the same direction. The first table, the number of times the second coordinate value indicating the position of the detection object on the second coordinate axis perpendicular to the first coordinate axis continuously changes in the same direction, and the second coordinate value in the same direction At least one of the accumulated values of the amount of change of the second coordinate value when continuously changing, and the change direction of the second coordinate value when the second coordinate value continuously changes in the same direction; A second table holding information relating to the second coordinate value, A table holding section for lifting,
Information on the first coordinate value in the first table is updated based on the first coordinate values sequentially input, and the second in the second table is updated based on the second coordinate values sequentially input. A table update unit for updating information on coordinate values;
A gesture detection apparatus comprising: a gesture detection unit configured to detect a movement pattern of the detection target based on the first and second tables. The gesture detection device according to claim 1,
The gesture detection unit includes an operation detection unit that detects, based on the first and second tables, a first operation in which the detection target rotates on a coordinate plane specified by the first and second coordinate axes. ,
The gesture detection unit uses the first movement detected by the movement detection unit as the movement pattern,
The motion detector is
Based on the first table, a first movement direction of the detection object along the plus direction of the first coordinate axis and a second movement direction of the detection object along the minus direction of the first coordinate axis. Based on the second table, the third movement direction of the detection object along the plus direction of the second coordinate axis and the fourth movement of the detection object along the minus direction of the second coordinate axis based on the second table A moving direction specifying unit for specifying a direction;
Gesture detection comprising: a determination unit that determines that the detection target object is performing the first action when the order in which the movement direction of the detection target object is specified by the movement direction specification unit indicates a predetermined order apparatus. The gesture detection device according to claim 2,
The determination unit
The order in which the moving direction of the detection target is specified in the moving direction specifying unit is retained as history information,
Based on the history information, it is determined whether the order in which the moving direction is specified in the moving direction specifying unit indicates the predetermined order,
When the moving direction is specified by the moving direction specifying unit, a combination of the moving direction and the order in which the moving direction of the detection target is specified by the moving direction specifying unit indicated by the history information is the predetermined order. A gesture detection device that updates the history information when included in a portion starting from the top of the list, and clears the history information when the combination is not included in a portion starting from the top of the predetermined order. The gesture detection device according to claim 2,
The determination unit performs the first operation when the order in which the movement direction of the detection target is specified by the movement direction specification unit is included in a plurality of types of orders including the predetermined order. A gesture detection device that determines that a user is performing. The gesture detection device according to claim 2,
The first operation includes a first rotation operation in which the detection target object rotates in the first direction on the coordinate plane, and a second direction in which the detection target object is opposite to the first direction on the coordinate plane. And a second rotation operation that rotates
The determination unit
When the order in which the movement direction of the detection object is specified in the movement direction specifying unit indicates a first predetermined order, it is determined that the detection object is performing the first rotation operation;
The detection object performs the second rotation operation when the order in which the movement direction of the detection object is specified by the movement direction specifying unit indicates a second predetermined order different from the first predetermined order. A gesture detection device for determining The gesture detection device according to claim 5,
The determination unit
The order in which the moving direction of the detection target is specified in the moving direction specifying unit is retained as history information,
Based on the history information, determine whether the order in which the moving direction is specified in the moving direction specifying unit indicates the first or second predetermined order,
When the moving direction is specified by the moving direction specifying unit, a combination of the moving direction and the order in which the moving direction of the detection target is specified by the moving direction specifying unit indicated by the history information is the first. The history information is updated when it is included in either the part starting from the beginning of the predetermined order or the part starting from the beginning of the second predetermined order, and the combination is the beginning of the first predetermined order A gesture detection device that clears the history information when it is not included in any of the part starting from the first part and the part starting from the beginning of the second predetermined order. The gesture detection device according to claim 5,
The determination unit
When the order in which the movement direction of the detection target is specified by the movement direction specifying unit is included in a plurality of types of first orders including the first predetermined order, the detection target performs the first rotation operation. Determine that you are going,
When the order in which the movement direction of the detection target is specified by the movement direction specifying unit is included in a plurality of types of second orders including the second predetermined order, the detection target performs the second rotation operation. A gesture detection device that determines that a user is performing. A gesture detection device according to any one of claims 2 to 7,
The motion detection unit detects a second motion of the detection target moving along the first coordinate axis based on the first table,
The gesture detection unit
When the motion detection unit detects both the first and second motions, the first motion is the motion pattern,
A gesture detection device that uses the second motion as the motion pattern when the motion detection unit detects the second motion and does not detect the first motion. A gesture detection device according to any one of claims 2 to 7,
The table holding unit includes a number of times that a third coordinate value indicating a position of the detection target on a third coordinate axis perpendicular to the first and second coordinate axes continuously changes in the same direction, and the third coordinate value. And the third coordinate value when the third coordinate value continuously changes in the same direction, and at least one of the accumulated values of the change amounts of the third coordinate value when the value continuously changes in the same direction. A third table that holds information about the third coordinate value, including a change direction of
The table update unit updates information on the third coordinate value in the third table based on the third coordinate value sequentially input,
The motion detection unit detects a second motion of the detection target moving along the third coordinate axis based on the third table,
The gesture detection unit
When the motion detection unit detects both the first and second motions, the first motion is the motion pattern,
A gesture detection device that uses the second motion as the motion pattern when the motion detection unit detects the second motion and does not detect the first motion. A gesture detection device according to any one of claims 2 to 9,
The motion detection unit detects a third motion of the detection target alternately moving in the plus direction and the minus direction along the first coordinate axis based on the first table;
The gesture detection unit
A gesture detection device that uses the third motion as the motion pattern when the motion detection unit detects the third motion. A gesture detection device according to any one of claims 2 to 8,
The table holding unit has a number of times that a third coordinate value indicating a position of the detection target on a third coordinate axis perpendicular to the first and second coordinate axes continuously changes in the same direction, and the third coordinate value is At least one of the accumulated values of the amount of change of the third coordinate value when continuously changing in the same direction, and the third coordinate value when the third coordinate value is continuously changing in the same direction. A third table that holds information about the third coordinate value, including a change direction;
The table update unit updates information on the third coordinate value in the third table based on the third coordinate value sequentially input,
The motion detection unit detects a third motion of the detection target alternately moving in the plus direction and the minus direction along the third coordinate axis based on the third table,
The gesture detection unit
A gesture detection device that uses the third motion as the motion pattern when the motion detection unit detects the third motion. The gesture detection device according to any one of claims 3 and 6,
The first and second coordinate values are output from a position detection device that detects the position of the detection object and has a detection surface parallel to the coordinate plane,
The position detection device outputs a third coordinate value indicating a position of the detection object on a third coordinate axis perpendicular to the first and second coordinate axes;
The motion detection unit detects a second motion of the detection target moving along the first coordinate axis based on the first table,
A detection target presence / absence specifying unit for specifying whether or not the detection target exists based on the third coordinate value;
The gesture detection unit
When the motion detection unit detects both the first and second motions, the first motion is the motion pattern,
When the determination unit does not hold history information and the second motion is detected by the motion detection unit, the second motion is used as a motion pattern,
When the detection target is specified by the detection target presence / absence specifying unit, when the determination unit holds the history information and the second operation is detected by the operation detection unit, The second movement is not the movement pattern,
When the detection object presence / absence specifying unit specifies that the detection object does not exist, the determination unit holds the history information, and the operation detection unit does not detect the first operation and the second operation is not performed. A gesture detection device that uses the second movement as the movement pattern when a movement is detected. The gesture detection device according to any one of claims 3 and 6,
The first and second coordinate values are output from a position detection device that detects a position of the detection object and has a detection surface perpendicular to the first coordinate axis,
The motion detection unit detects a second motion of the detection target moving along the first coordinate axis based on the first table,
A detection target presence / absence specifying unit for specifying whether or not the detection target exists based on the first coordinate value;
The gesture detection unit
When the motion detection unit detects both the first and second motions, the first motion is the motion pattern,
When the determination unit does not hold history information and the second motion is detected by the motion detection unit, the second motion is used as a motion pattern,
When the detection target is specified by the detection target presence / absence specifying unit, when the determination unit holds the history information and the second operation is detected by the operation detection unit, The second movement is not the movement pattern,
When the detection object presence / absence specifying unit specifies that the detection object does not exist, the determination unit holds the history information, and the operation detection unit does not detect the first operation and the second operation is not performed. A gesture detection device that uses the second movement as the movement pattern when a movement is detected. The gesture detection device according to any one of claims 3 and 6,
The first and second coordinate values are output from a position detection device that detects the position of the detection object and has a detection surface parallel to the coordinate plane,
The position detection device outputs a third coordinate value indicating a position of the detection object on a third coordinate axis perpendicular to the first and second coordinate axes;
The table holding unit is a cumulative value of the number of times the third coordinate value continuously changes in the same direction, and a change amount of the third coordinate value when the third coordinate value continuously changes in the same direction. A third table that holds information about the third coordinate value, including at least one of the third coordinate value and a change direction of the third coordinate value when the third coordinate value continuously changes in the same direction. And
The table update unit updates information on the third coordinate value in the third table based on the third coordinate value sequentially output by the position detection device,
The motion detection unit detects a second motion of the detection target moving along the third coordinate axis based on the third table,
A detection target presence / absence specifying unit for specifying whether or not the detection target exists based on the third coordinate value;
The gesture detection unit
When the motion detection unit detects both the first and second motions, the first motion is the motion pattern,
When the determination unit does not hold history information and the second motion is detected by the motion detection unit, the second motion is used as a motion pattern,
When the detection target is specified by the detection target presence / absence specifying unit, when the determination unit holds the history information and the second operation is detected by the operation detection unit, The second movement is not the movement pattern,
When the detection object presence / absence specifying unit specifies that the detection object does not exist, the determination unit holds the history information, and the operation detection unit does not detect the first operation and the second operation is not performed. A gesture detection device that uses the second movement as the movement pattern when a movement is detected. The gesture detection device according to any one of claims 3 and 6,
The first and second coordinate values are output from a position detection device that detects a position of the detection object and has a detection surface perpendicular to the first coordinate axis,
The position detection device outputs a third coordinate value indicating a position of the detection object on a third coordinate axis perpendicular to the first and second coordinate axes;
The table holding unit is a cumulative value of the number of times the third coordinate value continuously changes in the same direction, and a change amount of the third coordinate value when the third coordinate value continuously changes in the same direction. A third table that holds information about the third coordinate value, including at least one of the third coordinate value and a change direction of the third coordinate value when the third coordinate value continuously changes in the same direction. And
The table update unit updates information on the third coordinate value in the third table based on the third coordinate value sequentially output by the position detection device,
The motion detection unit detects a second motion of the detection target moving along the third coordinate axis based on the third table,
A detection object presence / absence specifying unit for specifying whether or not the detection object exists based on the first coordinate value;
The gesture detection unit
When the motion detection unit detects both the first and second motions, the first motion is the motion pattern,
When the determination unit does not hold history information and the second motion is detected by the motion detection unit, the second motion is used as a motion pattern,
When the detection target is specified by the detection target presence / absence specifying unit, when the determination unit holds the history information and the second operation is detected by the operation detection unit, The second movement is not the movement pattern,
When the detection object presence / absence specifying unit specifies that the detection object does not exist, the determination unit holds the history information, and the operation detection unit does not detect the first operation and the second operation is not performed. A gesture detection device that uses the second movement as the movement pattern when a movement is detected. The gesture detection device according to any one of claims 1 to 15,
When the first coordinate value is input, the table update unit holds a change direction of the first coordinate value input this time with respect to the first coordinate value input last time in the first table. A gesture detection device that does not update the first table when the difference between the first coordinate value input last time and the first coordinate value input this time is smaller than a threshold value. . The gesture detection device according to any one of claims 1 to 16,
An output unit that outputs a central coordinate value of the three input first coordinate values to the table update unit each time three first coordinate values are input to the gesture detection device; A gesture detection device. A first table that holds information about a first coordinate value indicating the position of the detection target object on the first coordinate axis, and a second coordinate value indicating the position of the detection target object on the second coordinate axis perpendicular to the first coordinate axis An operation method of the gesture detection device holding a second table holding information about
The information related to the first coordinate value in the first table includes the number of times the first coordinate value continuously changes in the same direction, and the first time when the first coordinate value continuously changes in the same direction. At least one of the accumulated values of the change amount of one coordinate value and the change direction of the first coordinate value when the first coordinate value continuously changes in the same direction, The information on the second coordinate value includes the number of times the second coordinate value continuously changes in the same direction and the amount of change in the second coordinate value when the second coordinate value continuously changes in the same direction. And at least one of the cumulative values of the second coordinate value and a change direction of the second coordinate value when the second coordinate value continuously changes in the same direction,
(A) Updating the information on the first coordinate value in the first table based on the first coordinate value sequentially input to the gesture detection device, and the second coordinate sequentially input to the gesture detection device Updating information relating to the second coordinate value in the second table based on a value;
(B) A method of operating a gesture detection device, comprising: detecting a movement pattern of the detection target object based on the first and second tables updated in the step (a). A first table that holds information about a first coordinate value indicating the position of the detection target object on the first coordinate axis, and a second coordinate value indicating the position of the detection target object on the second coordinate axis perpendicular to the first coordinate axis A control program for controlling a gesture detection device that holds a second table that holds information about
The information related to the first coordinate value in the first table includes the number of times the first coordinate value continuously changes in the same direction, and the first time when the first coordinate value continuously changes in the same direction. Including at least one of accumulated values of the change amount of one coordinate value and a change direction of the first coordinate value when the first coordinate value continuously changes in the same direction;
The information regarding the second coordinate value in the second table includes the number of times the second coordinate value continuously changes in the same direction, and the second time when the second coordinate value continuously changes in the same direction. Including at least one of the accumulated values of the change amounts of the two coordinate values, and the change direction of the second coordinate values when the second coordinate value continuously changes in the same direction,
In the gesture detection device,
(A) Updating the information on the first coordinate value in the first table based on the first coordinate value sequentially input to the gesture detection device, and the second coordinate sequentially input to the gesture detection device Updating information relating to the second coordinate value in the second table based on a value;
(B) A control program for executing a step of detecting a motion pattern of the detection object based on the first and second tables updated in the step (a).

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