JP2005156356A - Subject distance measuring display device and portable terminal device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a subject distance measuring display device having excellent operability capable of designating easily a measuring point on the subject, and to provide a portable terminal device equipped therewith. <P>SOLUTION: A shutter is half-pushed in the state where the direction of an imaging part is adjusted so that the first measuring point of the subject enters inside of a range-finding frame W displayed approximately on the center of a display screen G of an image display part. Then, the shutter is half-pushed in the state where the direction of the imaging part is adjusted so that the second measuring point of the subject enters inside of the range-finding frame W. Hereby, two measuring points are designated, and the distance between the two points is determined. Arrows Y for showing the two points and the distance D between the two points are displayed in the synthesized state in a picked-up image. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a subject distance measurement display device and a mobile terminal device that measure and display the distance of a subject.

  A conventional camera-type distance measuring device irradiates a subject with distance measuring light and receives the reflected light with a CCD, thereby detecting the distance to the subject corresponding to each pixel from the amount of received light. As shown in FIG. 6, the conventional camera-type distance measuring device displays a photographed image on an LCD 137 provided on the back of the camera. The LCD 137 is provided with a touch panel. A pixel corresponding to the measurement point is selected. From the distance corresponding to the selected pixel, a coordinate value based on the camera at the measurement point is obtained. If the target survey value is, for example, an oblique distance between two measurement points, the two measurement points are selected with the pointing pen 160, and the oblique distance between the two points is calculated from the obtained coordinate values. The calculated measurement value is displayed on the LCD 137 (see, for example, Patent Document 1).

  In a conventional electronic still camera system capable of displaying dimensions, when a measurement position is selected by a dimension measurement position variable element, the selected position is focused and a bright spot is displayed. After selecting two points to be measured, the second release button is pressed to calculate the dimension between the points to be measured and the scale data indicating the section and store it in the memory circuit (see, for example, Patent Document 2). .

  A conventional camera device having a function of comparing or displaying the size of an image displayed at the time of imaging is focused on a certain range including the subject by an autofocus operation, and the subject image is displayed on the screen of the liquid crystal display. And points (bright spots) are displayed. Move the point to the distance measurement start point of the subject using the cursor movement key, and press the shutter halfway to obtain the distance A and fix the start point. The point is moved again to the distance measuring end point of the subject using the cursor movement key, and the number of point movement steps is counted. When the end point is specified, press the shutter fully to fix the end point. The angle θ is calculated by converting the number of point movement steps into an angle, the length L is obtained from L = Atan θ, and the scale value is displayed in an overlapping manner on the liquid crystal display (see, for example, Patent Document 3).

  In addition, a distance measuring apparatus in which an image of a subject is formed on each imaging sensor (sensor array) by a pair of light receiving lenses and a subject distance is obtained based on the principle of triangulation has been conventionally known. (For example, refer to Patent Documents 4 and 5).

  In addition, a digital electronic camera having a function as a mobile phone is conventionally known (for example, see Patent Document 6).

When a subject distance measurement display device that measures and displays a distance between two points on a subject is used as a portable device, it is desirable that the measurement point can be easily specified. However, in the conventional distance measuring device, it is inconvenient to separately carry a pointing pen for designating a measurement point on a subject. In addition, the dimension measuring position variable element in the state where the camera or mobile phone device with these distance measuring devices is held by hand and the image to be photographed is displayed on the viewfinder, LCD monitor screen, etc. It is troublesome to specify the measurement position by operating and to specify the measurement point by operating the cursor movement key.
JP 2001-124544 A JP-A-5-45124 Japanese Patent Laid-Open No. 11-102007 JP 2003-84190 A JP 2003-98423 A JP 11-136554 A

  The present invention has been made in view of the above-described conventional circumstances, and has an easy-to-operate subject distance measurement display device that can easily specify a measurement point on a subject, and a portable terminal device including the same. The purpose is to provide.

An object distance measurement display device of the present invention includes an image display unit that displays a captured image;
A subject distance measuring unit that measures a distance to a subject displayed at a specific position of the image display unit and outputs subject distance data;
An imaging direction detector that detects an imaging direction of the captured image and outputs imaging direction data;
When the first designation operation is performed, data including the subject distance data and the imaging direction data is acquired as measurement data of the first point displayed at the specific position of the image display unit at that time. At the same time, when the second designation operation is performed, data including the subject distance data and the imaging direction data is used as measurement data of the second point displayed at the specific position of the image display unit at that time. A measurement point data acquisition unit to be acquired;
Based on the measurement data of the first point and the measurement data of the second point, a point-to-point distance calculation unit for obtaining a distance between the first point and the second point;
An image synthesis unit that synthesizes display information indicating the distance between the first point and the second point obtained by the distance calculation unit between the two points with the captured image;
Is provided.

  With this configuration, it is possible to easily specify a measurement point on a subject, and it is possible to provide a subject distance measurement display device with good operability.

  In the subject distance measurement display device according to the present invention, the image composition unit includes a mark indicating the first point and the second point on the captured image, and the first point and the second point. The value of the distance between them is synthesized.

In the subject distance measurement display device of the present invention, the measurement point data acquisition unit acquires a captured image of the first point and a captured image of the second point,
The image composition unit compares the captured image with the captured image of the first point and the captured image of the second point, and corresponds to the captured image of the first point and the captured image of the second point. A mark indicating the first point and a mark indicating the second point are combined and displayed at the position of the captured image.

  Further, in the subject distance measurement display device according to the present invention, the image composition unit includes the captured image of the first point, the captured image of the second point, the first point, and the second point on the image display unit. The distance between the points is displayed.

  With this configuration, the user can easily recognize the measurement point.

  In the subject distance measurement display device of the present invention, the first designation operation and the second designation operation are performed by half-pressing the shutter operation unit.

  With this configuration, it is not necessary to provide a dedicated operation unit for designating the measurement point, so that the apparatus can be reduced in size.

  The present invention provides a portable terminal device including the subject distance measurement display device.

  With this configuration, a measurement point on a subject can be easily specified, and a portable terminal device with good portability and operability can be provided.

  ADVANTAGE OF THE INVENTION According to this invention, the object distance measurement display apparatus with favorable operativity which can designate the measurement point on a to-be-photographed object easily, and a portable terminal device provided with the same can be provided.

  FIG. 1 is a block diagram showing a schematic configuration of a subject distance measurement display device for explaining an embodiment of the present invention. As illustrated in FIG. 1, the subject distance measurement display device 1 according to the present embodiment includes an imaging unit 10, a subject distance measurement unit 20, an imaging direction detection unit 30, a data storage unit 40, and a two-point distance calculation. A unit 50, an image composition unit 60, an image display unit 70 including a liquid crystal display device, an overall operation control unit 80 configured using a microcomputer system and the like, and a shutter operation unit 90.

  The imaging unit 10 is an imaging optical system 11 having an imaging lens, a lens driving unit, an iris driving unit, and the like, an imaging element 12 such as a CCD image sensor, and an imaging signal is read out from the imaging element 12 and A / D converted and imaged. An A / D converter 13 for outputting image data is provided.

  The subject distance measuring unit 20 measures a distance to a predetermined position of the captured image, for example, a subject located at the center, and outputs subject distance data. As the configuration of the subject distance measuring unit 20, for example, a pair of light receiving lenses, a pair of imaging sensors (for example, a CCD image sensor, etc.), an A / D converter, and a digital image of the subject formed on each imaging sensor, respectively. Subject distance calculation means for calculating the subject distance from the relative position difference by the principle of triangulation, subject distance data output means for outputting data of the determined subject distance, and the like.

  The subject distance measuring unit 20 is based on the time difference between the means for intermittently projecting infrared light or laser light, the image sensor for detecting reflected light from the subject, and the timing of projecting light and detecting the reflected light. An object distance detecting unit that detects the object distance may be provided. The subject distance measurement unit 20 also includes means for intermittently projecting infrared light or laser light, an image sensor for detecting reflected light from the subject, and subject distance detection for detecting subject distance based on the amount of reflected light. It is good also as a structure provided with a means. Note that the imaging device 12 of the imaging unit 10 may be used as the imaging device that detects reflected light from the subject.

  The imaging direction detection unit 30 includes an angular velocity sensor 31 such as a gyro sensor, and an angle calculation unit 32 that integrates the movement angle in the imaging direction based on the output of the angular velocity sensor 31 and outputs imaging direction angle data. In addition to the angular velocity sensor 31, the imaging direction detection unit 30 includes an absolute azimuth detection sensor such as a geomagnetic sensor and a reference direction detection sensor that detects a horizontal direction or a vertical direction. Imaging direction angle data including azimuth data in the imaging direction and elevation / dip angle data may be output based on the output of each sensor.

  The data storage unit 40 includes, for example, a semiconductor memory. The data storage unit 40 stores captured image data and imaging direction angle data. There are two types of captured image data: normal imaging data and measurement point imaging data when a measurement point is designated.

  The overall operation control unit 80 includes a measurement point data acquisition unit 81, an imaging control unit 82, and a display control unit 83. In the imaging standby state in which the shutter operation unit 90 is not operated, the imaging control unit 82 supplies the captured image data output from the imaging unit 10 to the image display unit 70 via the image synthesis unit 60, and the imaging unit 10. The image picked up in (5) is displayed on the image display unit 70.

  When the shutter operation unit 90 performs a release operation (imaging operation), the imaging control unit 82 stores the captured image data output from the imaging unit 10 in the data storage unit 40 in association with the imaging order. Then, the imaging control unit 82 supplies the captured image data stored in the data storage unit 40 to the image display unit 70 via the image synthesis unit 60 and causes the image display unit 70 to display the captured image.

  When the distance measurement mode is set by an operation unit (not shown), the display control unit 83 generates an image obtained by combining the distance measurement frames by the image composition unit 60, and a composite image including the distance measurement frame at the center position of the captured image. Is displayed on the image display unit 70. The captured image data output from the imaging unit 10 is supplied to the image display unit 70 via the image synthesis unit 60. In addition, you may make it transfer to ranging mode by operating the shutter operation part 90 several times in a short time. Further, when the half-pressed state of the shutter operation unit 90 is continued for several seconds, the mode may be shifted to the distance measurement mode.

  In a state where the distance measurement frame is displayed at the center position of the display screen of the image display unit 70 (that is, the distance measurement mode), the imaging unit so that the first measurement point (start point) for which the distance is to be measured falls within the distance measurement frame. 10 is adjusted to operate the shutter operation unit 90 in a half-pressed state. When the shutter operation unit 90 is operated halfway in the distance measurement mode, the measurement point data acquisition unit 81 associates the captured image data, the subject distance data, and the imaging direction angle data as the measurement point imaging data, Is stored in the data storage unit 40 as measurement point data of the first measurement point (start point).

  Once the first measurement point is specified, the half-pressed state is once released, and then the imaging direction of the imaging unit 10 is adjusted so that the second measurement point (end point) whose distance is to be measured falls within the distance measurement frame, The shutter operation unit 90 is operated to a half-pressed state. The measurement point data acquisition unit 81 associates the captured image data as the measurement point imaging data, the subject distance data, and the imaging direction angle data, and uses them as the measurement point data of the second measurement point (end point). To store.

  Here, after the shutter operating unit 90 is half-pressed and the first measurement point is designated, the half-pressed state is maintained as it is, and the point where the half-pressed state is released is designated as the second measurement point. The first measurement point and the second measurement point may be designated.

  When the measurement point is designated by half-pressing the shutter operation unit 90, the display control unit 83 displays the distance based on the subject distance data measured by the subject distance measurement unit 20 based on the subject distance data. You may make it display on. Thereby, the distance to a pin can be measured and displayed, for example in a golf course.

  When the first measurement point (start point) and the second measurement point (end point) are designated, the display control unit 83 stops the display of the distance measurement frame. When the first measurement point (start point) and the second measurement point (end point) are designated, the overall operation control unit 80 activates the distance calculation unit 50 between two points and is stored in the data storage unit 40. The measured point data of the first and second points (start point and end point) are supplied to the distance calculation unit 50 between two points.

  The two-point distance calculation unit 50 is based on subject distance data and imaging angle data up to the first measurement point (start point), and subject distance data and imaging angle data up to the second measurement point (end point). A distance (oblique distance) between the two points (between the start point and the end point) is obtained by calculation, and the obtained distance data between the two points is supplied to the distance display means 61 in the image composition unit 60. The distance display unit 61 displays the distance between the two points on the image display unit 70 based on the distance data between the two points.

  The distance display means 61 synthesizes and displays a display such as an arrow connecting the first measurement point and the second measurement point on the previously captured image, and displays the distance between the two points in the vicinity of the arrow. You may make it make it.

  Here, the distance display unit 61 matches the first captured image data with the first measured point and the second measured point image data by matching the first captured image data with the first measured point and the second measured point image data. A second measurement point is detected, a vector connecting these two points is obtained, and an arrow connecting the two points is displayed.

  For example, the distance display unit 61 extracts the contour lines of the previously captured image, extracts the contour lines of the images at the first measurement point and the second measurement point, and compares the extracted contour lines. -By collating, the 1st measurement point and the 2nd measurement point in the image imaged previously are detected, the vector which connects those 2 points | pieces is calculated | required, and the arrow etc. which connect 2 points | pieces are displayed.

  Note that the subject distance measurement display device 1 according to this embodiment not only measures and displays the distance between two points in a captured image, but also measures and displays the distance between two points that do not fall within the captured image. can do. In this case, the distance display means 61 forms a reduced image of the first measurement point and a reduced image of the second measurement point, respectively, and displays the two reduced images on the image display unit 70 separately from each other. The distance between two points is displayed. Thereby, even when two points are not included in one captured image, it is possible to display what each measurement point is.

  Further, the distance display means 61 may display a mark indicating each point instead of displaying an arrow or a line segment connecting two points. Further, the distance to each point (subject distance) and angle may be displayed.

  FIG. 2 is a flowchart showing the operation of the subject distance measurement display device according to the embodiment of the present invention. When a shutter pressing operation is performed (step S1), image data reading, distance measurement, and angle measurement are performed, and image data, distance data, and angle data are stored in the data storage unit 40 (step S2). Contour extraction is performed (step S3). In step S2, distance measurement and angle measurement need not be performed.

  Next, in step S4, when the shutter is half-pressed with the imaging position adjusted so that the first measurement point (start point) enters the distance measurement frame by half-pressing the shutter (designation of the start point), the first The image data of the measurement point (start point) is read, the distance to the first measurement point and the angle are measured (step S5), and the contour of the image of the first measurement point (start point) is extracted (step S6). ).

  Next, in step S7, when the shutter is half-pressed (end point designation) with the imaging position adjusted so that the second measurement point (end point) falls within the distance measurement frame (end point designation), the second measurement point (end point) ), The distance to the second measurement point and the angle are measured (step S8), and the contour of the image at the second measurement point (end point) is extracted (step S9).

  Next, the distance between the two points of the first measurement point (start point) and the second measurement point (end point) is obtained by calculation (step S10). Then, the contour lines extracted in step S3, step S6, and step S9 are compared and collated, and the positions of the first measurement point (start point) and the second measurement point (end point) in the captured image are detected. (Step S11). Then, an image in which a line segment such as an arrow connecting two points and a distance is combined with the captured image based on the position detected in step S11 and the distance is generated and displayed on the image display unit 70 (step S12).

  FIG. 3 is an explanatory diagram showing the operation of the subject distance measurement display device according to the embodiment of the present invention. 3A is a diagram showing a captured image displayed on the screen of the image display unit, FIG. 3B is a diagram showing a designated state of the first measurement point, and FIG. 3C is a second measurement point. FIG. 3D is a diagram showing a display example of the distance measurement result between two points. In addition, the code | symbol G in a figure shows the screen of the image display part 70, the codes | symbols H and V show the auxiliary line at the time of the imaging displayed on the screen, and the code | symbol W has shown the ranging frame.

  As shown in FIG. 3A, in the state where the orientation of the imaging unit 10 is adjusted so that the subject to be imaged (here, the house) is within the screen G, the subject (here, House) is imaged, and the captured image is displayed in the screen G.

  When the distance measurement mode is designated, a distance measurement frame (here, a square mark) W is displayed at the center of the screen G as shown in FIG. 3B, so that the first measurement of the subject (here, the house) is performed. By pressing the shutter halfway with the orientation of the imaging unit 10 adjusted so that the point is within the distance measurement frame (here, a square mark) W, the subject image data including the first measurement point is data In addition to being stored in the storage unit 40, subject distance data and angle data up to the first measurement point are stored in the data storage unit 40.

  Next, as shown in FIG. 3C, the orientation of the imaging unit 10 is adjusted so that the second measurement point of the subject (here, the house) is within the distance measurement frame (here, the square mark) W. In this state, by pressing the shutter halfway, the subject image data including the second measurement point is stored in the data storage unit 40, and the subject distance data and the angle data up to the second measurement point are stored in the data storage unit. 40.

  When the first and second measurement points (that is, the start point and the end point) are specified, the distance between the two points is calculated by the distance calculation unit 50 between the two points, and the position of the two points in the captured image is displayed by the distance display unit 61. 3 is detected, and the distance D between the two points together with the arrow image Y connecting the two points is combined with the captured image and displayed on the screen G as shown in FIG.

  2 and 3, an example is described in which each measurement point is specified after the subject is imaged, and an arrow that connects each measurement point to the captured image of the subject and the distance between the two points are combined and displayed. It is also possible to designate each measurement point without imaging the subject and display the distance between them.

  FIG. 4 is a diagram showing another distance display example of the subject distance measurement display device according to the embodiment of the present invention. As shown in FIG. 4A, when the orientation of the imaging unit 10 is adjusted so that the measurement point of the subject in the distance measurement frame W is in place, the subject is displayed on the screen G by pressing the shutter halfway. The distance D may be displayed. Further, not only the distance to the subject but also the angle may be displayed.

  In the case where the first measurement point and the second measurement point are separated from each other and the two points cannot be photographed simultaneously due to the angle of view, as shown in FIG. 4B, the first measurement point including the first measurement point P1 is included. The one reduced image S1 and the second reduced image S2 including the second measurement point P2 are displayed separately on the screen G, and the distance D between the measurement points P1 and P2 is displayed. Good.

  In the present embodiment, an example in which each point (measurement point) is specified by half-pressing the shutter operation unit 90 has been described. However, a dedicated operation unit such as a key or button for specifying the measurement point is provided. You may do it.

  FIG. 5 is a block diagram showing a schematic configuration of the mobile phone device according to the embodiment of the present invention. A mobile phone device 100 as an example of a mobile terminal device according to an embodiment of the present invention includes a mobile phone device main body 110 and a subject distance measurement display device 1A according to the present embodiment. In the mobile phone device 100 according to the present embodiment, the image display unit 70 is shared by the image display of the mobile phone device 100 and the image display of the subject distance measurement display device 1A.

  Since the cellular phone device 100 according to the present embodiment includes the subject distance measurement display device 1A according to the present embodiment, the measurement point of the subject is placed in the distance measurement frame W displayed on the image display unit 70. A measurement point can be designated by adjusting the orientation of the imaging unit 10 and half-pressing the shutter in that state. Then, by designating two measurement points, the distance between the two points is displayed on the image display unit 70.

  The cellular phone device 100 according to the present embodiment does not need to carry a pointing pen or the like in order to designate a measurement point. Further, it is not necessary to operate a cursor movement key or the like in order to designate a measurement point. Adjust the orientation of the imaging unit 10 (imaging direction of the digital camera built in the mobile phone device 100) so that the measurement point falls within the distance measurement frame W displayed on the image display unit 70, and press the shutter halfway. Thus, the measurement point can be designated, so that the measurement point can be easily designated in the state where the mobile phone device 100 is held and imaged.

  As described above, the subject distance measurement display device and the mobile phone device including the subject distance measurement device according to the present embodiment capture an image so that a point to be measured is captured within a distance measurement frame displayed at the center of the image display unit, for example. Since the measurement point can be designated by performing the measurement point designation operation such as half-pressing the shutter in a state where the direction of the part is determined, the measurement point can be designated easily.

  The subject distance measurement display device of the present invention has an effect that a measurement point on a subject can be easily specified, and is useful for a portable terminal device or the like.

The block diagram which shows schematic structure of the to-be-photographed object distance measurement display apparatus for describing embodiment of this invention The flowchart which shows operation | movement of the to-be-photographed object distance measurement display apparatus which concerns on embodiment of this invention. Explanatory drawing which shows operation | movement of the to-be-photographed object distance measurement display apparatus which concerns on embodiment of this invention. The figure which shows the other distance display example of the to-be-photographed object distance measurement display apparatus which concerns on embodiment of this invention. The block diagram which shows schematic structure of the mobile telephone apparatus which concerns on embodiment of this invention. The figure which shows the designation method of the measurement point of the conventional camera type distance measuring device

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,1A Subject distance measurement display apparatus 10 Imaging part 11 Imaging optical system 12 Imaging element 13 A / D conversion part 20 Subject distance measurement part 30 Imaging direction detection part 31 Angular velocity sensor 32 Angle calculation part 40 Data storage part 50 Distance between two points Calculation unit 60 Image composition unit 61 Distance display means 70 Image display unit 80 Overall operation control unit 81 Measurement point data acquisition unit 82 Imaging control unit 83 Display control unit 90 Shutter operation unit 100 Mobile phone device

Claims (6)

An image display unit for displaying captured images;
A subject distance measuring unit that measures a distance to a subject displayed at a specific position of the image display unit and outputs subject distance data;
An imaging direction detector that detects an imaging direction of the captured image and outputs imaging direction data;
When the first designation operation is performed, data including the subject distance data and the imaging direction data is acquired as measurement data of the first point displayed at the specific position of the image display unit at that time. In addition, when the second designation operation is performed, the data including the subject distance data and the imaging direction data is used as measurement data of the second point displayed at the specific position of the image display unit at that time. A measurement point data acquisition unit to be acquired;
Based on the measurement data of the first point and the measurement data of the second point, a distance calculation unit between two points for obtaining a distance between the first point and the second point;
An image synthesis unit that synthesizes display information indicating the distance between the first point and the second point obtained by the distance calculation unit between the two points with the captured image;
A subject distance measurement display device.   2. The subject distance measurement display device according to claim 1, wherein the image composition unit includes, in the captured image, a mark indicating the first point and the second point, and the first point and the second point. A subject distance measurement display device that synthesizes the distance values between and. The subject distance measurement display device according to claim 2,
The measurement point data acquisition unit acquires a captured image of the first point and a captured image of the second point,
The image composition unit compares the captured image with the captured image of the first point and the captured image of the second point, and corresponds to the captured image of the first point and the captured image of the second point. A subject distance measurement display device that combines and displays a mark indicating the first point and a mark indicating the second point at the position of the captured image.   2. The subject distance measurement display device according to claim 1, wherein the image composition unit includes a captured image of the first point, a captured image of the second point, the first point, and the A subject distance measurement display device for displaying a distance from a second point.   5. The subject distance measurement display device according to claim 1, wherein the first designation operation and the second designation operation are performed by a half-press operation of a shutter operation unit. Measurement display device.   A portable terminal device comprising the subject distance measurement display device according to any one of claims 1 to 5.

Images