JP2010028282A - Camera and coordinate calculation program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a camera for obtaining the position information of an object regardless of the reflectance of the object. <P>SOLUTION: The camera includes: a position information acquisition means for acquiring the photographing position information of two different spots A and B at which a common object is photographed respectively; a direction information acquisition means for acquiring photographing direction information θA and θB at the two spots A and B, respectively; and a position information calculation means for calculating position information indicated by the intersection O of straight lines extended from the two spots A and B to the photographing direction on a plane including the two spots A and B. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a camera that acquires coordinates of a subject and a coordinate calculation program.

  A technique for calculating the coordinates of a subject on a map is known (see Patent Document 1).

Japanese Patent No. 3875817

  The prior art has a problem that it cannot be applied when the reflectance of the subject is low.

(1) A camera according to the present invention includes a position information acquisition unit that acquires shooting position information at two different points where a common subject is shot, a direction information acquisition unit that acquires shooting direction information at two points, and two points, respectively. Position information calculating means for calculating position information indicated by intersections of straight lines respectively extending from two points to a shooting direction on a plane including
(2) The coordinate calculation program according to the present invention includes a position information reading process for reading out shooting position information at two points from two image files obtained by shooting a common subject at two different points, and shooting at two points from the two image files. A computer device is caused to execute azimuth information reading means for reading azimuth information and position information calculation processing for calculating position information indicated by intersections of straight lines respectively extending from two points to a shooting azimuth on a plane including two points. Features.

  According to the present invention, position information of a subject can be obtained regardless of the reflectance of the subject.

  The best mode for carrying out the present invention will be described below with reference to the drawings. FIG. 1 is a diagram for explaining a map coordinate acquisition system configured including an electronic camera 10 according to an embodiment of the present invention. In FIG. 1, the map coordinate acquisition system images the main subject from two different points A and B on the map. Then, the coordinates O where the main subject is located are calculated based on the position information (coordinates) of the points A and B and the information indicating the respective shooting directions θA and θB at the points A and B.

  The map information is acquired from the map information provider via the network or recorded in advance in a non-volatile memory and stored in the electronic camera 10. FIG. 2 is a diagram illustrating a configuration for taking map information into the electronic camera 10 via a network. In FIG. 2, a management server 11, a terminal (PC) 12, and an access point 13 are connected to the network.

  The management server 11 is arranged in a data center or the like by a map information provider. The management server 11 manages the map information to be provided. A terminal (PC) 12 is an Internet access terminal (for example, a personal computer) held by a user of the electronic camera 10 at home or the like, and is configured to be accessible to the management server 11 via the Internet.

  The access point 13 is a wireless access terminal provided in a station or store by a communication carrier or the like. When the electronic camera 10 has a communication function, the user can access the management server 11 from the electronic camera 10 via the access point 13.

In the map coordinate acquisition system, the user of the electronic camera 10 accesses the management server 11 by any one of the following modes and acquires map information.
(1) A user connects to the Internet from the terminal 12 and acquires map information. The electronic camera 10 and the terminal 12 are connected with a USB cable or the like, and map information is recorded in the electronic camera 10.

(2) A user connects to the Internet from the terminal 12 and acquires map information. The recording medium 10A attached to the electronic camera 10 is taken out from the electronic camera 10 and mounted in a card slot (not shown) of the terminal 12, and map information is recorded in the recording medium 10A. In this case, connection between the electronic camera 10 and the terminal 12 is unnecessary.

(3) The user connects the electronic camera 10 to the Internet via the access point 13 and acquires map information. The electronic camera 10 that has established communication with the access point 13 records map information in the electronic camera 10.

  FIG. 3 is a block diagram illustrating the main configuration of the electronic camera 10. In FIG. 3, a timing generator (TG) 105 sends timing signals to a driver 104, an AFE (Analog Front End) circuit 102, an A / D conversion circuit 103, and an image processing circuit 106 in accordance with an instruction sent from the main CPU 108. Supply. The driver 104 supplies a drive signal required by the image sensor 101.

  The photographing lens L forms a subject image on the imaging surface of the image sensor 101. The image sensor 101 is configured by a CCD image sensor or the like including a plurality of photoelectric conversion elements corresponding to pixels, captures a subject image formed on the imaging surface, and performs photoelectric conversion according to the brightness of the subject image. Output a signal.

  The AFE circuit 102 performs analog processing (such as gain control) on the photoelectric conversion signal output from the image sensor 101. The A / D conversion circuit 103 converts the image pickup signal after analog processing into a digital signal.

  The main CPU 108 receives a signal output from each block, performs a predetermined calculation, and outputs a control signal based on the calculation result to each block. The image processing circuit 106 is configured as an ASIC, for example, and performs image processing on the digital image signal input from the A / D conversion circuit 103. The image processing includes, for example, contour enhancement, color temperature adjustment (white balance adjustment) processing, and format conversion processing for an image signal.

  The image compression circuit 107 performs image compression processing at a predetermined compression ratio on the image signal processed by the image processing circuit 106 by the JPEG method. The display image creation circuit 110 creates display data for displaying the captured image on the liquid crystal monitor 111. The liquid crystal monitor 111 displays a reproduced image based on the display data input from the display image creation circuit 110. The display image creation circuit 110 creates data for displaying messages, menus, marks, etc., in addition to image display data. Thereby, information other than an image is also displayed on the liquid crystal monitor 111.

  The recording medium 10 </ b> A includes a memory card that can be attached to and detached from the electronic camera 10. The recording medium 10A records captured image data and an image file including the captured information according to an instruction from the main CPU. The image file recorded on the recording medium 10A can be read by an instruction from the main CPU.

  The buffer memory 109 temporarily stores data before and after image processing and in the middle of image processing, stores an image file before recording on the recording medium 10A, and stores an image file read from the recording medium 10A. Used as work memory.

  The operation member 113 corresponds to the operation buttons of the electronic camera 10 and outputs an operation signal corresponding to the pressing operation of each button to the main CPU 108. The wireless interface 116 transmits / receives data to / from an external device (such as a terminal provided in the access point 13) according to an instruction from the main CPU 108 by any one of communication methods such as wireless LAN communication, infrared communication, and optical communication. The external interface 112 transmits / receives data to / from an external device (such as a personal computer or a cradle) according to an instruction from the main CPU 108 via a cable (not shown).

  The GPS device 114 receives radio waves from GPS satellites according to instructions from the main CPU 108 and outputs received signals to the main CPU 108. The main CPU 108 performs a predetermined calculation based on the received signal from the GPS device 114 and detects the positioning information (latitude, longitude, altitude) of the electronic camera 10.

  The direction sensor 115 detects the geomagnetism in accordance with an instruction from the main CPU 108, and obtains and obtains the direction in which the electronic camera 10 faces, that is, the direction in which the optical axis of the photographing lens L faces based on the detected geomagnetism. A signal indicating the azimuth is output to the main CPU. The azimuth detected by the azimuth sensor 115 corresponds to the shooting azimuth taken by the electronic camera 10.

  The electronic camera 10 is configured to generate an image file in which additional information including positioning information, azimuth information, information on the captured image, and the like is added to the image data acquired at the time of shooting. Specifically, an image file in Exif format is generated in which image data in JPEG format is stored in the image data portion and additional information is stored in the additional information portion.

<Display with electronic camera>
A playback operation in which the electronic camera 10 displays information in the image file on the liquid crystal monitor 111 will be described with reference to the display on the liquid crystal monitor 111 as an example. FIG. 4 is a diagram of the electronic camera 10 as viewed from the liquid crystal monitor 111 (rear surface) side. In FIG. 4, a liquid crystal monitor 111 is provided on the back of the electronic camera 10, and a zoom switch 113b, a menu switch 113c, other operation switches 113d, 113e, 113g, and a dial 113f are provided beside the liquid crystal monitor 111. The dial 113f configured in a ring shape generates a rotation operation signal corresponding to the rotation operation and a pressed position signal corresponding to the pressing operation. The determination switch 113g is disposed at the center of the dial 113f. A release button 113a is disposed on the upper surface of the electronic camera 10.

A map image is displayed on the liquid crystal monitor 111. For example, the main CPU 108 of the electronic camera 10 causes the liquid crystal monitor 111 to display a map of an area corresponding to an item designated by the menu setting among the following five items.
1. 1. Map including the current location of electronic camera 10 (position calculated based on received signal from GPS device 114) 2. Last (previous) area map displayed on the LCD monitor 111 3. Map including the position (calculated based on the received signal from the GPS device 114) measured at the time of the last (previous) shooting Map of predetermined area 5. Map of area indicated by operation signal from operation member 113

  Map information necessary for displaying a map image is configured to be received from an external device via the wireless interface 116 or the external interface 112. The received map data can also be recorded on the recording medium 10A.

  In the display image of the liquid crystal monitor 111 illustrated in FIG. 4, marks 21 to 24 are displayed so as to overlap the map image. The marks 21 to 24 indicate that an image photographed at a position corresponding to each mark exists in the electronic camera 10. Specifically, when the image file stored in association with the positioning information corresponding to the display positions of the marks 21 to 24 is recorded in the recording medium 10A, the position indicated by the positioning information (shooting) Mark is displayed at (Position).

  The display range of the map image displayed on the liquid crystal monitor 111 (that is, the scale of the map) changes according to the operation signal from the zoom switch 113b. The main CPU 108 performs display control so that the zoom ratio is reduced (enlarged display) when the zoom switch 113b is operated to the telephoto side (T) and is increased (reduced display) when the zoom switch 113b is operated to the wide side (W). .

  The pointer 31 is display-controlled so as to be movable within the display screen of the liquid crystal monitor 111. The main CPU 108 moves the pointer 31 smoothly in the direction of the pressed position in response to the pressed position signal from the dial 113f. For example, when the right side of the dial 113f is pressed, the pointer 31 is moved rightward from the current display position. When the right side of the dial 113f continues to be pressed, the pointer 31 is moved further to the right side. When the pointer 31 reaches the right side of the display screen and the right side of the dial 113f is further pressed, the map image to be displayed is moved to the left. Scroll. As a result, the right side portion on which the map image is not displayed is newly displayed on the liquid crystal monitor 111.

  The main CPU 108 similarly performs display control when the upper side, the left side, and the lower side of the dial 113f are pressed. In addition, when the diagonally upper side and the diagonally lower side of the dial 113f are pressed, display control is performed so that the map image scrolls in each direction.

  In addition to displaying a map image on the liquid crystal monitor 111 as described above, normal reproduction display in which an image based on data in an image file recorded on the recording medium 10A is displayed on the liquid crystal monitor 111 is also possible.

<Obtain map coordinates with electronic camera>
A map coordinate calculation mode setting process for causing the electronic camera 10 to calculate map coordinates and a flow of the map coordinate calculation process will be described with reference to flowcharts illustrated in FIGS. 7 and 8. When the menu switch 113c is pressed, the main CPU 108 activates a program for performing the processing of FIG. In step S <b> 101 of FIG. 7, the main CPU 108 displays an “operation menu” screen illustrated in FIG. 5 on the liquid crystal monitor 111.

  The “operation menu” includes a “map coordinate calculation mode on” item 171 and an “image selection” item 172. When the cross switch 22g is pressed down in the vertical direction while the “operation menu” screen is displayed, the main CPU 108 changes the selection item up or down according to the operation signal.

  In step S102, the main CPU 108 determines whether or not a menu end operation has been performed. When the menu switch 113c is pressed, the main CPU 108 makes a positive determination in step S102 and proceeds to step S109. In step S109, the main CPU 108 ends the menu display and ends the process shown in FIG.

  On the other hand, if the menu switch 113c is not pressed, the main CPU 108 makes a negative determination in step S102 and proceeds to step S103. In step S103, the main CPU 108 determines whether or not a map coordinate calculation mode ON operation has been performed. For example, when the right side of the dial 113f is pressed while the “map coordinate calculation mode on” item 171 is selected, the main CPU 108 makes a positive determination in step S103 and proceeds to step S104. Note that the process also proceeds to step S104 when the map coordinate calculation mode is already set and the map coordinate calculation mode off operation is not performed. In step S104, the main CPU 108 sets the map coordinate calculation mode, and proceeds to step S105.

  When the map coordinate calculation mode off operation is performed with the “map coordinate calculation mode on” item 171 selected, the main CPU 108 makes a negative determination in step S103 and proceeds to step S108. In this case, the main CPU 108 cancels the map coordinate calculation mode in step S108 and returns to step S102.

  In step S <b> 105, the main CPU 108 displays an “image selection” screen illustrated in FIG. 6 on the liquid crystal monitor 111. The display objects are all image files recorded (registered) in the recording medium 10A. According to FIG. 6, twelve thumbnail images are displayed. In the thumbnail display, thumbnail images included in each image file are displayed side by side. The main CPU 108 displays a cursor 174 surrounding one of the thumbnail images. The main CPU 108 further displays check boxes 173 corresponding to the respective thumbnail images.

  The main CPU 108 moves the display position of the cursor 174 up and down according to the operation signal when the dial 113 f is pressed down in the up and down direction while the “image selection” screen is displayed. Further, when the dial 113f is pressed down in the left-right direction while the “image selection” screen is displayed, the main CPU 108 moves the display position of the cursor 174 to the left or right in accordance with the operation signal.

  In step S106, the main CPU 108 determines whether or not an image selection operation has been performed. When the determination switch 113g is pressed while the check mark is not displayed in the check box surrounded by the cursor 174, the main CPU 108 displays the check mark in the check box. The display of the check mark indicates that the image file corresponding to the thumbnail image has been selected. When the main CPU 108 selects two image files, the main CPU 108 makes a positive determination in step S106 and proceeds to step S107. In the present embodiment, there are two image file selections.

  In the present embodiment, two image files corresponding to the thumbnail images 181 and 182 are selected. The selected image file is obtained by photographing the same main subject from different points, and the main subject is taken at the center of each screen. Note that the distance from each shooting point to the main subject and the zoom magnification at the time of each shooting may be different.

  When the determination switch 113g is pressed while the check mark is displayed in the check box surrounded by the cursor 174, the main CPU 108 removes the check mark from the check box. Deletion of the check mark represents non-selection of the image file corresponding to the thumbnail image.

  On the other hand, if the image file is not selected, the main CPU 108 makes a negative determination in step S106 and proceeds to step S110. In step S107, which proceeds when an affirmative determination is made in step S106, the main CPU 108 stores information indicating the selected image file in the memory in the main CPU 108, and proceeds to step S112.

  In step S112, the main CPU 11 calculates the map coordinates of the main subject, that is, the coordinates on the map where the main subject is located, and proceeds to step S113. Details of the map coordinate calculation process will be described later. In step S113, the main CPU 108 adds information indicating the calculated map coordinates of the main subject to each of the two selected image files. Specifically, the calculated map coordinate information is additionally recorded in the additional information of the image file. After adding the calculated map coordinate information to the image file, the main CPU 108 returns to step S102.

  In step S110 which proceeds when a negative determination is made in step S106, the main CPU 108 determines whether or not an end operation has been performed. When the menu switch 113c is pressed, the main CPU 108 makes a positive determination in step S110 and proceeds to step S109. If the menu switch 113c is not pressed down, the main CPU 108 makes a negative determination in step S110 and proceeds to step S111.

  In step S111, the main CPU 108 returns to step S106 when a predetermined time (for example, 10 seconds) elapses with no operation of the operation member 113.

  The image selection described above is configured to be performed even if the map coordinate calculation mode is not turned on. For example, when the right side of the dial 113f is pressed with the “Select Image” item 172 selected on the menu screen illustrated in FIG. 5, the main CPU 108 displays the “Select Image” screen illustrated in FIG. The same processing as in steps S306, S307, S310, and S311 is performed. In this case, the main CPU 108 returns the display content of the liquid crystal monitor 111 to the “operation menu” screen illustrated in FIG. 5 after the selection process.

  Details of the map coordinate calculation processing will be described with reference to the flowchart of FIG. In step S201 in FIG. 8, the main CPU 108 reads out positioning information indicating the shooting point of each image and azimuth information indicating the shooting direction from the two selected image files, and proceeds to step S202.

  In step S202, the main CPU 108 reads map information including two shooting points from the recording medium 10A, and proceeds to step S203. In step S203, the main CPU 108 plots the shooting positions of the two images on the map based on the positioning information, and proceeds to step S204. The plotted imaging points correspond to the points A and B in FIG. Here, the coordinates necessary for the calculation may be virtually set in the memory space, and may not be superimposed on the actual map data.

  In step S204, the main CPU 108 draws straight lines from the shooting points A and B on the map in the shooting direction based on the direction information, and proceeds to step S205. In FIG. 1, a straight line that forms a predetermined angle (a sandwich angle θA, θB between a meridian and a line indicating a shooting direction) from a meridian passing through the shooting point indicates a shooting direction. In step S205, the intersection of the two straight lines on the map is calculated, and the process shown in FIG. 8 ends. The intersection of two straight lines corresponds to the coordinates (for example, latitude and longitude) of the main subject.

According to the embodiment described above, the following operational effects can be obtained.
(1) When the electronic camera 10 captures a common subject from two different points, the electronic camera 10 acquires positioning information and direction information at the two points, respectively, and moves from the two points to the shooting direction on a plane including the two points. A straight line was drawn and the intersection of two straight lines was calculated. The intersection of the two straight lines corresponds to the coordinates of the main subject. Thereby, unlike the prior art, the coordinates of the main subject can be calculated even when the reflectance of the main subject is low.

(2) Since the intersection of straight lines is calculated on a map including two points (mapping), the position of the main subject (for example, latitude and longitude) on the map can be calculated.

(3) Since positioning information and azimuth information are acquired from an image file including positioning information and azimuth information, it is mainly used in cameras that do not include a GPS device for obtaining positioning information or an azimuth sensor for obtaining azimuth information. The coordinates of the subject can be calculated.

(Modification 1)
In the above description, the example in which the coordinates of the main subject are calculated based on the already captured image file has been described. Instead, it may be configured to assist shooting for calculating map coordinates. In this case, when the map coordinate calculation mode is set, the main CPU 108 of the electronic camera 10 causes the liquid crystal monitor 111 to display a message for prompting the first image.

  When the user performs a release operation, the main CPU 108 generates an image file including the acquired image data, positioning information, and orientation information, and records the image file on the recording medium 10A. Further, the main CPU 108 causes the liquid crystal monitor 111 to display a message for prompting the second image.

  When the user performs the second release operation, the main CPU 108 generates an image file including the acquired image data, positioning information, and orientation information, and records the image file on the recording medium 10A. The main CPU 108 further calculates the coordinates of the main subject based on the two image files, and adds the calculated map coordinate information to the two image files. According to the first modification, map coordinate information can be automatically calculated each time two identical main subjects are photographed.

(Modification 2)
In the above description, an example has been described in which the coordinates of the main subject are calculated based on an image file captured by changing the shooting point with one electronic camera 10. Instead, a common main subject is photographed from different photographing points by the two electronic cameras 10, and an image file of the recording medium 10 </ b> A recorded by one electronic camera 10 is read by the other electronic camera 10. The coordinates of the main subject may be calculated based on the two image files. By sharing the shooting with the two cameras 10, the required time can be shortened compared with the case where the two cameras 10 travel around two locations.

(Modification 3)
Two image files are obtained by photographing a common main subject from different photographing points by two electronic cameras 10 and transmitting an image file acquired and generated by one electronic camera 10 to the other electronic camera 10. The coordinates of the main subject may be calculated based on the above. Communication between the electronic cameras 10 in this case may be performed between the electronic cameras 10 via the wireless interface 116 or via a network (FIG. 2). Since an immediate image file can be transferred between the two cameras 10, map coordinate information can be calculated in real time when two identical main subjects are photographed.

(Modification 4)
The place name or name corresponding to the coordinates may be acquired by referring to the map information, and the place name, name, etc. may be displayed on the liquid crystal monitor 111 together with the reproduced image. FIG. 9 is a diagram illustrating a reproduced image displayed on the liquid crystal monitor 111. The main subject name is displayed along with the reproduced image. Note that latitude and longitude information may be displayed together.

  For example, when the switch 113d is pressed, the main CPU 108 displays a map image including the two shooting points A and B illustrated in FIG. 1 and the coordinates O of the main subject in place of the reproduced image in FIG. 111 is displayed. When the switch 113d is operated again, the reproduced image of FIG. 9 is displayed again instead of the map image of FIG. Further, the main CPU 108 displays the pointer 31 (FIG. 2) while displaying the map image of FIG. 1, and corrects the position of the coordinate O by a drag operation using the pointer 31. The main CPU 108 updates and records the corrected coordinate information in two image files.

(Modification 5)
In the above description, the example in which the coordinates in the horizontal plane are calculated has been described, but the coordinates in the vertical plane (that is, the altitude) may be calculated. In this case, an elevation angle (or depression angle) sensor is provided in the electronic camera 10, the elevation angle (or depression angle) at the time of photographing is detected, and elevation angle (or depression angle) information is recorded in the additional information of the image file. The main CPU 108 plots the altitudes at the shooting locations of the two images on the vertical plane based on the altitude information recorded in the additional information of the image file. In addition, the point which should just virtually set the coordinate required for a calculation to memory space is the same as that of the case of the coordinate calculation in a horizontal surface.

  Further, the main CPU 108 draws a straight line from the photographing point to the photographing direction on the vertical plane based on the elevation angle (decline) information. A straight line that forms a predetermined angle (a sandwich angle θC, θD between the horizontal line and a line indicating the shooting direction) from the horizontal line passing through the shooting point indicates the elevation (decline) direction. The main CPU 108 calculates the intersection of two straight lines in the vertical plane. The intersection of the two straight lines represents the altitude of the main subject.

(Modification 6)
Although the example which calculates a map coordinate with the electronic camera 10 was demonstrated, you may comprise a map coordinate calculation apparatus by making the computer apparatus 200 shown in FIG. 10 perform the map coordinate calculation program which performs the process by FIG. When the map coordinate calculation program is taken into the personal computer 200 and used, the program is loaded on the data storage device of the personal computer 200 and then used as the map coordinate calculation device.

  The loading of the program to the personal computer 200 may be performed by setting a recording medium 204 such as a CD-ROM storing the program in the personal computer 200, or to the personal computer 200 by a method via the communication line 201 such as a network. You may load. When passing through the communication line 201, the program is stored in the hard disk device 203 of the server (computer) 202 connected to the communication line 201. The map coordinate calculation program can be supplied as various forms of computer program products such as provision via the recording medium 204 or the communication line 201.

  Although the electronic camera 10 has been described as an example, the present invention may be implemented by an electronic device such as a mobile phone.

  The above description is merely an example, and is not limited to the configuration of the above embodiment.

It is a figure explaining the map coordinate acquisition system comprised including the electronic camera by one embodiment of this invention. It is a figure which illustrates the structure which takes in map information to an electronic camera via a network. It is a block diagram which illustrates the principal part composition of an electronic camera. It is the figure which looked at the electronic camera from the liquid crystal monitor (back) side. It is a figure which illustrates an "operation menu" screen. It is a figure which illustrates an "image selection" screen. It is a flowchart explaining the flow of the setting process of map coordinate calculation mode. It is a flowchart explaining the flow of a map coordinate calculation process. It is a figure which illustrates a reproduction picture. It is a figure which illustrates a computer apparatus.

Explanation of symbols

10. Electronic camera 10A, 204 ... Recording medium 108 ... Main CPU
111 ... Liquid crystal monitor 113 ... Operation member 114 ... GPS device 115 ... Direction sensor 116 ... Wireless interface 200 ... Personal computer

Claims (7)

Position information acquisition means for respectively acquiring shooting position information of two different points where a common subject is shot;
Direction information acquisition means for acquiring the shooting direction information at the two points,
A camera comprising: position information calculating means for calculating position information indicated by intersections of straight lines respectively extending from the two points to the shooting direction on a plane including the two points. The camera of claim 1,
Map information acquisition means for acquiring map information including the two points,
The position information calculation means calculates position information indicated by intersections of straight lines respectively extending from the two points to the shooting direction on the map. The camera of claim 1,
The two image files photographed at the two points include the photographing position information and the photographing direction information, respectively.
The position information acquisition unit acquires the shooting position information from the two image files,
The camera is characterized in that the azimuth information acquisition means acquires the photographing azimuth information from the two image files. The camera according to claim 3.
A communication means for communicating with an external device;
One of the two image files is obtained via the communication means. The camera of claim 1,
The position information acquisition means acquires the shooting position information based on radio waves from an external device at the time of shooting at the two points,
The camera is characterized in that the azimuth information acquisition means acquires the shooting direction information based on geomagnetism at the time of shooting at the two points. The camera according to claim 5, wherein
A camera, further comprising: a file generation unit configured to generate an image file including the shooting position information, the shooting direction information, and shot image data at the time of shooting. Position information read processing for reading out the shooting position information of the two points from two image files obtained by shooting a common subject at two different points;
Azimuth information reading means for reading the shooting azimuth information at the two points from the two image files,
A coordinate calculation program for causing a computer device to execute position information calculation processing for calculating position information indicated by intersections of straight lines respectively extending from the two points to the shooting direction on a plane including the two points.

Images