JP2016048429A - Handwriting input device determination method program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a handwriting input device capable of more accurately determining the type of an object used for input.SOLUTION: A handwriting input device 10 includes: a pressure detection panel part 11 for detecting a place at which and a pressure with which a sheet placed on a detection surface is pressed by a contact body such as a writing instrument, an erasing tool or the hand; a determination part 12 for determining the type of the first contact body on the basis of first detection information related to a first contact body obtained from the output of the pressure detection panel part 11 and second detection information related to a second contact body detected simultaneously with the first contact body; and a processing part 12 for performing processing to the first detection information in an input mode corresponding to the type of the determination result. For example, when it is not possible to determine whether the first contact body is a pen or an erasure from the characteristics of the first contact body, the first contact body is determined as the erasure under such a condition that the second contact body having the characteristics of the hand strongly pressing the sheet is present near the first contact body.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a handwriting input device that accepts input by a pen or the like via a sheet such as paper placed on a detection surface, a determination method that determines the type of a contact body used for input, and a program.

  In a handwriting input device that accepts handwriting input, in addition to a function that receives writing of characters and figures, a function that accepts an operation of erasing erroneously written characters and the like is also required.

  If the user designates whether the input is a write operation or an erase operation each time, the user-friendliness is not good. Therefore, a technique for automatically determining whether the input is a write operation or an erase operation has been proposed.

  For example, when the input stroke follows the original stroke that has already been written, when the original stroke is reversed within a certain range of the original stroke, or when the input stroke moves frequently to the left and right of the original stroke, the input There is a technique for determining a stroke that has been performed as an erasing operation (see Patent Document 1).

  In addition, in a handwriting input device in which the content is input as a handwriting stroke when characters and figures are written on a sheet of paper or the like placed on the detection surface with an actual writing instrument, the erasing operation includes characters drawn on the sheet and An eraser that can actually erase the figure is used. Erasers are characterized by a large contact area with the sheet compared to writing instruments such as pens and pencils. In view of this, there is a technique of using this feature to determine whether an object used for input is an eraser based on the size of a contact area (see, for example, Patent Document 2).

Special table 2010-511260 JP 2012-108647 A

  Although the methods disclosed in Patent Documents 1 and 2 can determine to some extent whether the input is a write operation or an erase operation, there are cases where the input is confusing and there is a possibility of erroneous determination.

  For example, the operation of erasing with the eraser 8 has a feature of repeatedly reciprocating within a predetermined range as shown in FIG. However, the same feature also appears when the mark sheet selection field is filled with the writing tool 6 as shown in FIG.

  In general, an eraser has a larger contact area to the sheet than a writing instrument such as a pen, but when using the corner of an eraser or a pen-type eraser, the contact area to the sheet is large. Since it is small, it is not possible to correctly determine whether the object used for input is a writing instrument or an eraser only by the determination based on the contact area.

  The present invention is intended to solve the above-described problem, and a handwriting input device that can more accurately determine the type of an object used for input, and a determination for determining the type of an object used for input. It aims to provide a method and program.

  The gist of the present invention for achieving the object lies in the inventions of the following items.

[1] A place where the sheet placed on the detection surface is pressed by a contact body such as a writing instrument, an erasing tool, and a hand, and a pressure detection panel unit for detecting pressure,
Based on the first detection information regarding the first contact body obtained from the output of the pressure detection panel unit and the second detection information regarding the second contact body detected simultaneously with the first contact body. A determination unit for determining the type of the first contact body;
A processing unit that performs processing on the first detection information in an input mode corresponding to the type indicated by the determination result of the determination unit;
The handwriting input device characterized by having.

  In the above invention and the invention described in [7] below, the first detection information related to the first contact body detected by the pressure detection panel section and the second detection information detected by the pressure detection panel section simultaneously with the first contact body. The type of the first contact body is determined from the second detection information related to the contact body, and the process for the first detection information is performed in the input mode corresponding to the type. For example, whether the first contact body is a pen or an eraser is determined from the first contact body in which the pen or the eraser is misleading and the situation of the hand (second contact body) holding the sheet.

[2] The determination unit includes a feature of the first contact body indicated by the first detection information, a feature of the second contact body indicated by the second detection information, and the first contact body. The handwriting input device according to [1], wherein the type of the first contact body is determined based on a relative position between the first contact body and the second contact body.

  In the above invention and the invention described in [8] below, the type of the first contact body is narrowed down from the characteristics of the first contact body indicated by the first detection information. Further, the type of the second contact body and the state of pressing are recognized from the characteristics of the second contact body indicated by the second detection information. Then, the type of the first contact body is determined based on the fact that the first contact body with a narrowed type and the second contact body with the recognized type and situation exist in a predetermined positional relationship.

[3] The handwriting input device according to [2], wherein the features include a feature relating to a contact area with the sheet, pressure to press the sheet, and movement on the sheet.

[4] In the determination unit, the feature of the first contact body indicated by the first detection information matches the feature of the erasing tool, and the feature of the second contact body indicated by the second detection information is When the erasing tool is used, the first contact body is determined to be an erasing tool when the first contact body and the second contact body are within a predetermined distance in accordance with the characteristics of the hand pressing the sheet. The handwriting input device according to [2] or [3], characterized in that:

  In the above invention and the invention described in [10] below, since the writing instrument may exhibit characteristics similar to the characteristics of the erasing tool, the first contact body only has the characteristics of the erasing tool. Cannot be determined as an eraser. Therefore, on the condition that the second contact body has a feature of the other hand that holds the sheet when using the erasing tool with one hand, and the other hand is in the vicinity (within a predetermined distance) of the erasing tool. The first contact body is determined as an erasing tool.

[5] The erasing tool includes a feature in which the first contact body reciprocates or repeatedly moves in the same direction at the same or close location.
The handwriting input device according to [4], wherein

[6] The feature of the hand pressing the sheet includes that the second contact body is stationary by pressing the sheet with a certain contact area and a certain pressure. 4] or the handwriting input device according to [5].

[7] The type of the contact body in the handwriting input device provided with the pressure detection panel unit for detecting the place where the sheet placed on the detection surface is pressed by the contact body such as a writing tool, an erasing tool, and a hand. It is the determination method which determines, Comprising: The 1st detection information regarding the 1st contact body obtained from the output of the said pressure detection panel part, and the 2nd regarding the 2nd contact body detected simultaneously with the said 1st contact body And determining the type of the first contact body based on the detected information.

[8] Characteristics of the first contact body indicated by the first detection information, characteristics of the second contact body indicated by the second detection information, the first contact body, and the second contact information The determination method according to [7], wherein the type of the first contact body is determined based on a relative position with respect to the contact body.

[9] The determination method according to [8], wherein the feature includes a feature related to a contact area with the sheet, a pressure for pressing the sheet, and a movement on the sheet.

[10] When the feature of the first contact body indicated by the first detection information matches the feature of the erasing tool, and the feature of the second contact body indicated by the second detection information uses the erasing tool. The first contact body is determined as an erasing tool when the first contact body and the second contact body are within a predetermined distance. The determination method according to [8] or [9].

[11] The feature of the erasing tool includes that the first contact body reciprocates, or repeatedly moves in the same direction at the same or close location,
The determination method according to [10], wherein

[12] The feature of the hand pressing the sheet includes that the second contact body is stationary by pressing the sheet with a certain contact area and a certain pressure. 10] or the determination method according to [11].

[13] An information processing apparatus including a place where a sheet placed on a detection surface is pressed by a contact body such as a writing instrument, an erasing tool, and a hand, and a pressure detection panel unit that detects pressure, [1] to [1] 6] The program which functions as a handwriting input device as described in any one of.

  According to the handwriting input device, the determination method, and the program according to the present invention, the type of the object used for input can be determined more accurately.

It is a figure which shows an example of the external appearance and use condition of the handwriting input device which concerns on embodiment of this invention. It is a figure which shows an example of the mode which writes a character on the sheet | seat mounted in the detection surface of the handwriting input device, erases a part with an eraser, and drawing data obtained at that time. 1 shows an electrical schematic configuration of a handwriting input device according to an embodiment of the present invention. It is a figure which shows an example of a mode that a user handwritten a character etc. on a sheet | seat with a writing instrument. It is a figure which shows an example of a mode that a user erases the character etc. which are written on the sheet | seat with an eraser. The pressure per unit area which a pressure detection panel part detects when various contact bodies press the detection surface of a pressure detection panel part is shown. It is a figure which shows the relationship between the magnitude | size of the area (contact area) of each contact body which a pressure detection panel part detects when various contact bodies press the detection surface of a pressure detection panel part, and the magnitude | size of the pressure per unit area. . It is a figure which shows an example of the pressure distribution which the pressure detection panel part detected when a user handwritten a character etc. with a writing instrument. It is a figure which shows an example of the pressure distribution which the pressure detection panel part detected when a user erase | eliminated a character etc. with erasers, such as an eraser. It is a figure which shows an example of the pressure distribution which the pressure detection panel part detected when a user erases a character etc. using the corner of an eraser. It is a figure which shows the characteristic of the movement (reciprocating motion) of an erasing tool. It is a figure which shows the characteristic of the movement (repetitive movement to a single direction) of an erasure | elimination tool. It is a flowchart which shows operation | movement of the handwriting input device which detected the contact by a contact body. 14 is a flowchart showing a continuation of FIG. 13. It is a flowchart which shows the process in an eraser mode. It is a flowchart which shows the process in pen mode. It is a flowchart which shows the process in finger mode. It is a flowchart which shows the process in palm mode. It is a figure which shows a mode that it erases with an eraser. It is a figure which shows a mode that the mark sheet is painted with a pen.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows an example of the appearance and use state of a handwriting input device 10 according to an embodiment of the present invention. The handwriting input device 10 has a rectangular flat plate shape, and one surface of the handwriting input device 10 is a pressure detection panel that detects a place pressed by a contact body such as a writing instrument, an erasing tool, a palm, and a finger, and a pressure, except for a peripheral edge. The detection surface 11 a of the part 11 is formed.

  The handwriting input device 10 is used by placing a sheet 5 such as paper on the detection surface 11 a of the pressure detection panel unit 11. As shown in FIG. 2A, the user writes characters, figures, and the like on the sheet 5 placed on the detection surface 11 a of the pressure detection panel unit 11 of the handwriting input device 10 with a writing tool 6 such as a pencil. Further, as shown in FIG. 2B, when erasing characters and figures written on the sheet 5, the user uses an erasing tool 8 such as an eraser.

  The pressure detection panel unit 11 of the handwriting input device 10 allows the writing tool 6, the erasing tool 8, and the palm of the user when the user enters characters or the like on the sheet 5 with the writing tool 6 or erases the characters or the like with the erasing tool 8. The location (coordinates) where the fingertip or the like is pressing the detection surface 11a and its pressure are detected. The handwriting input device 10 is a type of contact body (writing tool) based on detection information (contact area of the contact body, pressure per unit area, movement, etc.) regarding each contact body obtained from the output of the pressure detection panel unit 11. Or whether it is an erasing tool, etc., and the detected information is processed in an input mode corresponding to the type indicated by the determination result.

  For example, when it is determined as a writing instrument, drawing data corresponding to the pressed part is generated, and when it is determined as an erasing tool, a process of erasing the drawing data existing at the pressed part is performed. FIG. 2 (C) shows drawing data in bitmap format obtained when the writing tool 6 receives the handwriting input shown in FIG. 2 (A) and then the erasing tool 8 receives the erasing operation shown in FIG. 2 (B). Is shown. In FIG. 2C, a portion erased by the erasing tool 8 is schematically shown by a broken-line circle 9.

  FIG. 3 shows an electrical schematic configuration of the handwriting input device 10. The handwriting input device 10 includes a CPU (Central Processing Unit) 12. Connected to the CPU 12 are a pressure detection panel unit 11, a flash ROM (Read Only Memory) 13, a RAM (Random Access Memory) 14, a recording medium connection unit 15, a communication unit 16, and the like.

  The flash ROM 13 stores programs and various data.

  When the CPU 12 executes a program stored in the flash ROM 13, the function as the handwriting input device 10 is realized. The CPU 12 functions as a determination unit that determines the type of contact body and a processing unit that processes detection information in an input mode according to the type of determination result. The RAM 14 is used as a work memory for temporarily storing various data when the CPU 12 executes a program. The RAM 14 stores the above-described drawing data.

  A portable recording medium such as an SD (Secure Digital) card 21 is detachably connected to the recording medium connection unit 15. The handwriting input device 10 can write the drawing data as a file to the SD card 21 connected to the recording medium connection unit 15.

  The communication unit 16 communicates with an external device by wireless communication. For example, the drawing data filed is transmitted to the external data storage server 22, and the drawing data is stored in the data storage server 22.

  The pressure detection panel unit 11 is a so-called pressure-sensitive touch panel that detects a pressed location (coordinates) and a pressed pressure. The pressure detection panel unit 11 can simultaneously detect pressures on a plurality of places. Detection by the pressure detection panel unit 11 is repeatedly performed every short time such as 0.05 seconds. When the writing instrument 6 or the like is moved and characters or the like are entered, pressing is detected in an area corresponding to the contact portion at the tip of the writing instrument 6 in one detection. By repeating this detection, the movement (trajectory) of the writing instrument 6 is recognized. Here, a digital resistive film type touch panel is used as the pressure detection panel unit 11.

  Next, each feature of the writing tool 6 such as a pen or pencil, the erasing tool 8 such as an eraser, the palm, and the finger, which can be read from the detection information obtained from the output of the pressure detection panel unit 11, will be described.

  FIG. 4 shows an example in which a user handwrites characters and the like on the sheet 5 with the writing instrument 6. Normally, when a user is handwriting a character or the like with the writing instrument 6 with one hand, the user gently presses the sheet 5 with the other hand (or attaches the other hand to the sheet 5).

  FIG. 5 shows an example of erasing characters and the like written on the sheet 5 with an erasing tool 8 such as an eraser. Normally, when the user is erasing characters or the like with the erasing tool 8 with one hand, the user strongly presses the sheet 5 with the other hand.

  The strength of pressing the sheet 5 with the other hand is greater when erasing the character or the like with the erasing tool 8 than when handwriting the character or the like with the writing tool 6. Many users write characters while placing a part of the hand holding the writing instrument 6 on the sheet 5. On the other hand, when erasing characters or the like with the erasing tool 8, many users float their hands with the erasing tool 8 from the sheet 5, and hardly place their hands with the erasing tool 8 on the sheet 5.

  FIG. 6 shows the pressure per unit area detected by the pressure detection panel unit 11 when various contact members press the detection surface 11 a of the pressure detection panel unit 11. The writing tool 6 such as a pen, pencil, or mechanical pencil has the largest pressure per unit area, and the next largest is the erasing tool 8 such as an eraser. Next, the finger has the largest pressure per unit area, and the palm has the smallest pressure per unit area.

  The pressure by the writing instrument 6 is a pressure at which the pen tip of the writing instrument 6 presses the detection surface 11 a of the pressure detection panel unit 11 through the sheet 5 when the user is handwriting a character or the like on the sheet 5 with the writing instrument 6. is there.

  The pressure by the erasing tool 8 is such that when the user erases characters or the like on the sheet 5 with the erasing tool 8 such as an eraser, the contact portion of the erasing tool 8 is detected by the pressure detection panel unit 11 via the sheet 5. It is the pressure which presses 11a.

  The finger pressure is applied to the other hand holding the sheet 5 when the user is handwriting a character or the like with the writing tool 6 or erasing the character or the like with the erasing tool 8. This is the pressure at which the finger presses the pressure detection panel unit 11 via the sheet 5, or the pressure at which the finger presses the pressure detection panel unit 11 through the sheet 5 when performing a touch operation or flick operation with the finger.

  The pressure by the palm is the pressure with which the palm of the hand holding the writing instrument 6 presses the detection surface 11 a of the pressure detection panel unit 11 via the sheet 5 when the user is handwriting a character or the like on the sheet 5 with the writing instrument 6. Or, the palm of the other hand holding the sheet 5 while the user is handwriting a character or the like with the writing instrument 6 in one hand presses the detection surface 11 a of the pressure detection panel unit 11 via the sheet 5. Pressure of the other hand holding the sheet 5 when the user is erasing characters or the like with the eraser 8 such as an eraser with one hand through the sheet 5 It is the pressure which presses the detection surface 11a.

  There is a partially overlapped region AB1 in the pressure range A1 per unit area that the writing instrument 6 can take and the pressure range B1 per unit area that the eraser can take. There is some overlap between the pressure range per unit area B1 that the eraser can take and the pressure range C1 per unit area that the finger can take. There is a partial overlap between the pressure range C1 per unit area that the finger can take and the pressure range D1 per unit area that the palm can take.

  The pressure per unit area when pressing the sheet 5 with the finger of the hand is larger when the erasing operation is performed with the erasing tool 8 such as an eraser than when writing the character or the like with the writing tool 6.

  In the range C1 of pressure per unit area that can be taken by the finger, the region Ea where the pressure is high is due to the finger of the hand pressing the sheet 5 when performing the erasing operation with the eraser, and the region Eb where the pressure is low is the writing instrument. This is due to the finger of the hand pressing (or attaching to) the sheet 5 when handwriting is performed. Part of the region Ea overlaps with the pressure range B1 per unit area that the eraser can take, and part of the region Eb overlaps with the range D1 of pressure per unit area that the palm can take.

  FIG. 7 shows the relationship between the size of each contact body (contact area) detected by the pressure detection panel unit 11 and the pressure per unit area when the contact body presses the detection surface 11a of the pressure detection panel unit 11. Is shown.

  The writing instrument 6 such as a pen or pencil has the smallest area, and the next smallest is the erasing tool 8 such as an eraser. The next smallest area is the finger, and the largest area is the palm.

  The area of the writing instrument 6 is the portion of the pen tip of the writing instrument 6 that presses the detection surface 11 a of the pressure detection panel unit 11 via the sheet 5 when the user is handwriting a character or the like on the sheet 5 with the writing instrument 6. It is an area.

  The area of the erasing tool 8 is such that when the user erases characters or the like on the sheet 5 with the erasing tool 8 such as an eraser, the contact portion of the erasing tool 8 passes through the sheet 5 and the detection surface of the pressure detection panel unit 11. It is the area of the part which presses 11a.

  The area of the finger is determined by the other hand holding the sheet 5 when the user is handwriting a character or the like with the writing tool 6 or erasing the character or the like with the erasing tool 8. The area of the portion where the finger presses the pressure detection panel 11 via the sheet 5 (area per finger), or when the finger performs a touch operation or flick operation, the finger detects the pressure via the sheet 5 It is the area of the part which presses the panel part 11.

  The area of the palm is a portion where the palm of the hand holding the writing instrument 6 presses the detection surface 11 a of the pressure detection panel unit 11 via the sheet 5 when the user is handwriting a character or the like on the sheet 5 with the writing instrument 6. Or the palm of the other hand holding the sheet 5 when the user is handwriting a character or the like with the writing instrument 6 in one hand, the detection surface 11a of the pressure detection panel unit 11 via the sheet 5 Or the palm of the other hand holding the sheet 5 when the user is erasing characters or the like with the eraser 8 such as an eraser with one hand This is the area of the portion that presses the detection surface 11 a of the detection panel unit 11.

  There is a partially overlapping region AB2 in the area range A2 that the writing instrument 6 can take and the area range B2 that the eraser can take. There is some overlap between the area range B2 that the eraser can take and the area range C2 that the finger can take. There is some overlap between the area range C2 that the finger can take and the area range D2 that the palm can take.

  FIG. 8 shows an example of the pressure distribution detected by the pressure detection panel unit 11 when the user handwritten characters or the like with the writing instrument 6. FIG. 8 corresponds to FIG. Pressure is detected at each position of the pen tip 31, the palm 32 of the hand holding the pen, the finger 33 of the hand pressing the sheet, and the palm 34 of the hand pressing the sheet.

  FIG. 9 shows an example of the pressure distribution detected by the pressure detection panel unit 11 when the user erases characters or the like with the eraser 8 such as an eraser. FIG. 9 corresponds to FIG. Pressure is detected at each position of the eraser contact portion 41, the finger 43 of the hand pressing the sheet, and the palm 44 of the hand pressing the sheet. Since the hand holding the eraser is floating from the sheet, no pressure is detected for the portion.

  In this case, since the area of the eraser contact portion 41 is sufficiently larger than the area of the pen tip 31 of the writing instrument 6 shown in FIG. 8, it can be determined that the contact body is the eraser 8 based on the difference in area.

  FIG. 10 shows an example of the pressure distribution detected by the pressure detection panel unit 11 when the user erases characters using the corners of the eraser. The area of the eraser contact portion 45 is confusing with the area of the pen tip 31 shown in FIG. 8, and it is difficult to determine that the contact body is the eraser 8 based on the area.

  11 and 12 show the characteristics of the movement of the erasing tool 8. When erasing characters or the like with the erasing tool 8, as shown in FIG. 10, the user reciprocates the erasing tool 8 at the same location or in a certain area close to the user. Alternatively, as shown in FIG. 11, the user repeatedly moves the erasing tool 8 in the same direction at the same place or in a certain area close to the user. Further, the sheet 5 is strongly pressed with a finger near a place where the erasing tool 8 is reciprocated or moved repeatedly in the same direction (for example, within 10 cm). The finger holding the seat 5 is stationary.

  In summary, the characteristics of the writing tool 6, the erasing tool 8, the finger, and the palm that can be read from the detection information obtained from the output of the pressure detection panel unit 11 are summarized as follows. Elements constituting the feature include the area of the contact portion (contact area), the pressure per unit area pressing the sheet 5, and the movement on the sheet 5.

  The area tends to be writing utensils <finger / eraser <palm.

  Pressure tends to be palm <finger <eraser <writing instrument.

  Regarding movement, the eraser is characterized by reciprocating motion or repeated movement in a certain direction.

  The writing instrument 6 is characterized in that the area of the contact portion is small and the pressure per unit area is not less than a certain level.

  The eraser 8 is characterized in that the area of the contact portion is large to some extent, the pressure per unit area is at an intermediate level, and performs the above-described specific movement.

  The finger has a feature that the area of the contact portion is large to some extent, the pressure per unit area is slightly weak, and is almost stationary or may move as a gesture alone.

  The palm has a feature that the area of the contact portion is large, the pressure per unit area is weak, and it is almost stationary.

  As described with reference to FIGS. 6 and 7, the type of the contact body may not be correctly determined only by the characteristics of the writing tool 6 and the erasing tool 8 alone.

  Therefore, in the handwriting input device 10 according to the present embodiment, the first detection information on the first contact body obtained from the output of the pressure detection panel unit 11 and the first detection information detected by the pressure detection panel unit 11 at the same time. The type of the first contact body is determined based on the second detection information regarding the second contact body.

  For example, the characteristics of the first contact body indicated by the first detection information, the characteristics of the second contact body indicated by the second detection information, and the relative positions of the first contact body and the second contact body The type of the first contact body is determined based on the above.

  More specifically, when the feature of the first contact body indicated by the first detection information matches the feature of the erasing tool 8, and the feature of the second contact body indicated by the second detection information uses the erasing tool 8. When the first contact body and the second contact body are within a predetermined distance, the first contact body is determined as an erasing tool.

  Here, the features of the erasing tool 8 include a movement feature in which the first contact body reciprocates, or the first contact body repeatedly moves in the same direction at a certain range in the same or close range. It is. The hand holding the sheet 5 includes a feature that the second contact body is stationary by pressing the sheet 5 with a certain contact area and a certain pressure.

  The contact area above a certain level is equal to or more than the area corresponding to the finger of the hand. Further, the pressure above a certain level is a pressure that is stronger than the pressure with which the finger of the other hand presses the sheet 5 when holding the writing tool 6 with one hand and handwriting the sheet 5, that is, the erasing tool 8 is held with one hand. This is a pressure corresponding to the pressure with which the finger of the other hand strongly presses the sheet 5 when erasing characters and the like.

  FIG. 13 and FIG. 14 are flowcharts showing the operation of the handwriting input device 10 that detects contact by a contact body. The CPU 12 of the handwriting input device 10 inputs data output from the pressure detection panel unit 11 (step S101). From this data, detection information such as the contact area, pressure, and movement of each contact body pressing the detection surface 11a of the pressure detection panel unit 11 is acquired (step S102).

  Next, the size of the area and pressure is determined for each contact body. Here, the contact body to which attention is paid is the first contact body. If the first contact body has a small area and a large pressure (step S103; Yes and step S104; Yes), the type of the first contact body is determined as the writing instrument 6, and the pen mode is set as the input mode (step S105), this process is terminated.

  The small area is a range not included in the region B2 in the region A2 of FIG. The high pressure is a range not included in the region B1 in the region A1 of FIG.

  If the area is large and the pressure is small (step S103; Yes and step S104; No), the type of the first contact body is determined as the palm, the palm mode is set as the input mode (step S106), and the process is terminated. To do.

  The large area is a range not included in the region C2 in the region D2 of FIG. The small pressure is a range not included in the region C1 in the region D1 of FIG.

  If the area is not small and the pressure is not large, and if the area is not large and the pressure is not small (step S103; No), it is determined whether or not a single point is detected and whether the area, pressure, and motion conditions are satisfied (step S107). ). When the characteristics of the first contact body satisfy the above-described conditions (step S107; Yes), the type of the first contact body is determined as a finger that performs some operation, and the finger mode is set as the input mode (step S108), the process is terminated.

  The detection of a single point is a case where two or more contact bodies are not detected at the same time. That is, only the finger is touching and the palm or pen is not touching at the same time. In the area, the area is in a range where the area is smaller than the lower limit of the large area and larger than the upper limit of the small area. The area is the area that can be taken by the finger and the eraser. During pressure, the pressure is in a range where the pressure is lower than the lower limit of the high pressure and higher than the upper limit of the low pressure. This is the pressure that the finger and eraser can take. The finger mode assumes a flick operation with a finger.

  If the above condition is not satisfied (step S107; No), it is determined whether or not the first contact body is reciprocating or repeatedly moving in a certain direction (step S109). If applicable (step S109; Yes), it is further determined whether or not the movement of the first contact body is a movement specific to the erasing tool 8 (step S110). That is, it is determined whether or not the reciprocating motion in the same place or in a certain fixed region, or the movement repeatedly moving in the same direction in the same location or in a certain fixed region.

  If the movement is not peculiar to the erasing tool 8 (step S110; No), the type of the first contact body is determined to be the writing tool 6, the pen mode is set as the input mode (step S111), and this process is terminated. .

  A motion similar to the motion unique to the erasing tool 8 may appear on the writing tool 6 as in the example of FIG. Therefore, when the movement is peculiar to the erasing tool 8 (step S110; Yes), in the vicinity of the first contact body (for example, within 10 cm or the like), the second that is large and stationary in the area and in the pressure. It is determined whether or not there is a contact body (step S112).

  “Large in pressure” refers to the area Ea in FIG. 6 and the predetermined range before and after the area in pressure. When there is a corresponding second contact body (step S112; Yes), the sheet 5 is strongly used as the second contact body in the vicinity of the first contact body that moves peculiar to the erasing tool 8 (within 10 cm). This corresponds to the case where the finger of the hand to be pressed (with a pressure above a certain level) exists, so the type of the first contact body is determined as the erasing tool 8 and the eraser mode is set as the input mode (step S113). The process ends.

  In the case of No in step S112, it is determined whether or not the first contact body has a small area and a large pressure (step S114). If the area is small and the pressure is large (step S114; Yes), the type of the first contact body is determined to be the writing instrument 6, the pen mode is set as the input mode (step S115), and the process is terminated.

  If the area is not small and the pressure is not large (step S114; No), it is determined that the type of the first contact body is a finger that performs some operation, the finger mode is set as the input mode (step S116), and this process is performed. finish.

  When the first contact body does not reciprocate or repeatedly move in a certain direction (step S109; No), it is determined whether the area is small and the pressure is large (step S117). When the first contact body has a small area and a large pressure characteristic (step S117; Yes), the type of the first contact body is determined as the writing instrument 6, and the pen mode is set as the input mode (step S118). ), This process is terminated.

  In the case of No in step S117, it is determined that the type of the first contact body is a finger that performs some operation, the finger mode is set as the input mode (step S119), and this process ends.

  As described above, when the type of the first contact body is determined and the input mode is set, processing for the detection information of the first contact body is executed in the set input mode. Hereinafter, the content of the processing for the detection information of the first contact body will be described for each input mode.

  FIG. 15 shows processing in the eraser mode. Coordinate data indicating the contact position of the eraser that is the first contact body is acquired (step S201). Here, the coordinate data indicates the center position of the contact range. Next, the information which shows the contact area of the eraser which is a 1st contact body is acquired (step S202). A region in contact with the first contact body is identified from the coordinates and contact area of the first contact body, drawing data existing in the region is acquired (step S203), and the drawing data is deleted (step S203). S204). Next, display based on the erased drawing data is performed (step S205), and this processing is terminated. This display is performed by transferring drawing data to a separately designated display and displaying it on the display, or when the handwriting input device 10 includes a display unit.

  FIG. 16 shows processing in the pen mode. The coordinate data indicating the contact position of the pen as the first contact body is acquired (step S301). Next, information indicating the contact area of the pen that is the first contact body is acquired (step S302). A region (drawing point) in contact with the first contact body is specified from the coordinates and contact area of the first contact body (step S303). The coordinates and area data of the previous drawing point are extracted (step S304). Then, the previous drawing point and the current drawing point are connected so as to form a single line with reference to the pen tip area data (step S305). Further, based on the previous drawing data, smoothing processing is performed to reconstruct the drawing data like a curve (or like a straight line) (step S306).

Next, a display based on the reconstructed drawing data is performed (step S307), and this process ends. This display is performed in the same manner as in step S205 in FIG.

  FIG. 17 shows processing in the finger mode. The coordinate data indicating the contact position of the finger which is the first contact body is acquired (step S401). Next, the previous finger data is extracted (step S402). The contact position indicated by the previous finger data is compared with the current contact position to determine whether or not the finger is moving (step S403). If the contact position of the finger is stationary (step S403; No), the stationary data of the finger is set (step S406), and this process ends.

  If there is a movement of the finger (step S403; Yes), it is determined whether or not the movement of the finger matches a predetermined gesture action (step S404). If the movement of the finger is a gesture action (step S404; Yes), gesture data is set (step S405), and this process ends. If the finger motion is not a gesture motion (step S404; No), it is determined that the finger press has no meaning and this processing is terminated.

  FIG. 18 shows processing in the palm mode. Coordinate data indicating the contact position of the palm which is the first contact body is acquired (step S501). Next, the information which shows the contact area of the palm which is a 1st contact body is acquired (step S502). Since there is no other contact body such as a pen in the vicinity of the palm as the first contact body, the data of the pressed portion in the vicinity of the area where the palm is present is removed as noise (step S503), and this processing is performed. Exit.

  As described above, in the handwriting input device 10 according to the present embodiment, in the determination based only on the characteristics of the first contact body, when the first contact body is confused as the writing tool 6 or the erasing tool 8, Since the type of the first contact body is determined based on the detection information about the first contact body and the detection information about the second contact body, the type of the first contact body can be specified with higher accuracy. it can.

  The embodiment of the present invention has been described with reference to the drawings. However, the specific configuration is not limited to that shown in the embodiment, and there are changes and additions within the scope of the present invention. Are also included in the present invention.

  For example, in the embodiment, the digital resistance film type pressure detection panel unit 11 has been illustrated, but other methods may be used as long as the pressed place, area, pressure, and the like can be detected.

  The determination based on the first contact body and the second contact body is not limited to those exemplified in the embodiment. For example, as shown in FIG. 8, when a character or the like is handwritten with the writing tool 6, the hand holding the writing tool 6 is pressed by the palm of the hand, but the erasing operation by the erasing tool 8 causes the hand holding the erasing tool 8 to float. Become. Therefore, whether or not the second contact body having the characteristics of the palm of the hand holding the writing tool 6 exists in the vicinity (for example, within 7 cm) of the first contact body, whether the first contact body is the writing tool 6 or not. You may add to the element which determines whether it is the eraser 8.

  In the embodiment, the example in which the first contact body is determined to be the writing tool or the erasing tool from the first detection information about the first contact body and the second detection information about the second contact body is shown. The object of determination is not limited to this. For example, it may be used for identifying an erasing tool such as an eraser and a finger.

  The present invention may be a program that causes an information processing device including the pressure detection panel unit 11 to function as the handwriting input device 10, or may be a method invention relating to the determination described in the embodiment.

DESCRIPTION OF SYMBOLS 5 ... Sheet 6 ... Writing tool 8 ... Erasing tool 9 ... Erased part 10 ... Handwriting input device 11 ... Pressure detection panel part 11a ... Detection surface 12 ... CPU
13 ... Flash ROM
14 ... RAM
DESCRIPTION OF SYMBOLS 15 ... Recording-medium connection part 16 ... Communication part 21 ... SD card 22 ... Data storage server 31 ... Pen tip 32 ... The palm of the hand holding a pen 33 ... The finger of the hand pressing a sheet 34 ... The palm of the hand pressing the sheet 41 ... Eraser 43 ... The finger of the hand pressing the sheet 44 ... The palm of the hand pressing the sheet 45 ... The contact part of the eraser A1 ... The range of pressure per unit area that the writing instrument can take A2 ... The range of the area that the writing instrument can take AB1 ... The writing instrument Range of pressure overlap between eraser and tool AB2 ... Range of overlapping area of writing tool and eraser B1 ... Range of pressure per unit area that eraser can take B2 ... Range of area that eraser can take C1 ... Finger Range of pressure per unit area to be obtained C2 ... Range of area that can be taken by finger D1 ... Range of pressure per unit area that can be taken by palm D2 Range of the area that the palm can take Ea: Range of pressure per unit area of the finger of the hand that presses the sheet when erasing with the eraser Eb: Per unit area of the finger of the hand that presses the sheet when writing with a writing instrument Pressure range

Claims (13)

A pressure detection panel unit for detecting a place where the sheet placed on the detection surface is pressed by a contact body such as a writing instrument, an erasing tool, and a hand; and a pressure;
Based on the first detection information regarding the first contact body obtained from the output of the pressure detection panel unit and the second detection information regarding the second contact body detected simultaneously with the first contact body. A determination unit for determining the type of the first contact body;
A processing unit that performs processing on the first detection information in an input mode corresponding to the type indicated by the determination result of the determination unit;
The handwriting input device characterized by having. The determination unit includes a feature of the first contact body indicated by the first detection information, a feature of the second contact body indicated by the second detection information, the first contact body, and the first contact body. The handwriting input device according to claim 1, wherein the type of the first contact body is determined based on a relative position with respect to the second contact body. The handwriting input device according to claim 2, wherein the features include a feature relating to a contact area with the sheet, pressure to press the sheet, and movement on the sheet. In the determination unit, the feature of the first contact body indicated by the first detection information matches the feature of the erasing tool, and the feature of the second contact body indicated by the second detection information is the erasing tool. The first contact body is determined to be an erasing tool when the first contact body and the second contact body are within a predetermined distance in accordance with the characteristics of a hand that holds the sheet in use. The handwriting input device according to claim 2 or 3, characterized in that The feature of the erasing tool includes that the first contact body reciprocates, or repeatedly moves in the same direction at the same or close location,
The handwriting input device according to claim 4. The feature of the hand pressing the sheet includes that the second contact body is stationary by pressing the sheet with a contact area of a certain level or more and a pressure of a certain level or more. 5. The handwriting input device according to 5. Determining the type of the contact body in a handwriting input device provided with a pressure detection panel unit for detecting the place where the sheet placed on the detection surface is pressed by a contact body such as a writing instrument, an erasing tool, or a hand It is a method, Comprising: The 1st detection information regarding the 1st contact body obtained from the output of the said pressure detection panel part, and the 2nd detection information regarding the 2nd contact body detected simultaneously with the said 1st contact body And determining the type of the first contact body based on the following. The characteristics of the first contact body indicated by the first detection information, the characteristics of the second contact body indicated by the second detection information, the first contact body and the second contact body The determination method according to claim 7, wherein the type of the first contact body is determined based on a relative position of the first contact body. The determination method according to claim 8, wherein the characteristics include characteristics relating to a contact area with the sheet, a pressure pressing the sheet, and a movement on the sheet. The feature of the first contact body indicated by the first detection information coincides with the feature of the erasing tool, and the feature of the second contact body indicated by the second detection information is used when the erasing tool is used. The first contact body is determined to be an erasing tool when the first contact body and the second contact body are within a predetermined distance in accordance with the characteristics of a hand that presses the button. The determination method according to 8 or 9. The feature of the erasing tool includes that the first contact body reciprocates, or repeatedly moves in the same direction at the same or close location,
The determination method according to claim 10. The feature of the hand pressing the sheet includes that the second contact body is stationary by pressing the sheet with a contact area of a certain level or more and a pressure of a certain level or more. 11. The determination method according to 11.   7. An information processing apparatus comprising a pressure detection panel unit that detects a place where a sheet placed on a detection surface is pressed by a contact body such as a writing instrument, an erasing tool, or a hand, and a pressure. A program for causing a handwriting input device described in one to function.