JP2019057899A - Photographing device, measurement device, and measurement system - Google Patents

Abstract

To provide a photographing device, a measurement device, and a measurement system that are capable of easily selecting simultaneously photographed two images among a plurality of images photographed by a plurality of photographing devices.SOLUTION: A photographing device 1 comprises: a photographing controller 11 that controls photographing of a subject; a stereo information setting unit 13 that sets stereo information including a stereo ID and a reference time; and an image file generation unit 14 that generates an image file including image data obtained by photographing, the stereo ID, and a photographing time using the reference time as a reference.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an imaging device, a measurement device, and a measurement system.

  Conventionally, a stereo camera that captures a stereo image by simultaneously capturing the same subject from different angles is known. A stereo image is a set of two images taken from different angles of the same subject. By analyzing the stereo image, information such as the length and area of the subject can be obtained.

  In recent years, a method of using two photographing apparatuses as a stereo camera has been proposed. According to this method, the same subject is simultaneously photographed from two different angles by two photographing devices, and the obtained two images are used as stereo images. Thereby, two imaging | photography apparatuses can be utilized as a stereo camera.

  However, according to the above conventional method, a user of a stereo camera (for example, a photographer) has to manually select a set of images to be used as a stereo image. For this reason, there has been a problem that the work burden on the user increases when each photographing apparatus performs photographing a plurality of times.

  The present invention has been made in view of the above problems, and an object of the present invention is to make it possible to easily select two images shot simultaneously from a plurality of images shot by a plurality of shooting apparatuses. .

  An imaging apparatus according to an embodiment includes an imaging control unit that controls imaging of a subject, a stereo information setting unit that sets stereo information including a stereo ID and a reference time, image data obtained by imaging, and the stereo ID And an image file generation unit that generates an image file including a shooting time based on the reference time.

  According to each embodiment of the present invention, it is possible to easily select two images shot at the same time from a plurality of images shot by a plurality of shooting devices.

The figure which shows an example of a structure of a measurement system. The figure which shows an example of the hardware constitutions of an imaging device. The figure which shows an example of a function structure of an imaging device. The figure which shows an example of a function structure of a measuring device. The sequence diagram which shows an example of the setting method of stereo information. The figure which shows an example of the setting screen of stereo information. The sequence diagram which shows an example of the production | generation method of an image file. The figure which shows an example of the data structure of an image file. The figure which shows an example of a maker note. The sequence diagram which shows an example of the production | generation method of a stereo image file. The flowchart which shows an example of the selection method of a corresponding image file.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In addition, regarding the description of the specification and the drawings according to each embodiment, constituent elements having substantially the same functional configuration are denoted by the same reference numerals and overlapping description is omitted.

  A measurement system 1000 according to an embodiment will be described with reference to FIGS. The measurement system 1000 according to the present embodiment is a system that measures the length and area of a subject using images captured by a plurality of independent imaging devices as stereo images.

  First, the configuration of the measurement system 1000 will be described. FIG. 1 is a diagram illustrating an example of the configuration of the measurement system 1000. A measurement system 1000 in FIG. 1 includes a stereo camera 10, an access point (hereinafter referred to as “AP”) 20, and a measurement device 30. The AP 20 and the measurement device 30 are connected via the network N. The network N is, for example, the Internet, a wireless local area network (LAN), a wired LAN, or a combination thereof, but is not limited thereto.

  The stereo camera 10 includes photographing devices 1 a and 1 b and a frame 2 which are independent from each other.

  The photographing device 1a (first photographing device) is a digital camera arranged on the left side of the stereo camera 10. The imaging device 1a is wirelessly connected to the AP 20 and communicates with the measurement device 30 via the AP 20 and the network N.

  The photographing apparatus 1b (second photographing apparatus) is a digital camera arranged on the right side of the stereo camera 10. The imaging device 1b is wirelessly connected to the AP 20 and communicates with the measurement device 30 via the AP 20 and the network N.

  The frame 2 is a fixing member for fixing the photographing apparatuses 1a and 1b, and fixes the photographing apparatus 1 so as to be detachable with screws or the like. The frame 2 has the photographing device 1a fixed to the left end and the photographing device 1b fixed to the right end. The stereo camera 10 is configured by fixing the photographing apparatuses 1a and 1b to the frame 2.

  The AP 20 is a wireless LAN device, is wirelessly connected to the photographing apparatuses 1a and 1b, and is connected to the network N by wire.

  The measurement device 30 is a device that measures the length and area of a subject based on an image file of an image captured by the stereo camera 10, and is connected to the network N by a wire and is connected to the network N and the AP 20 through the imaging device. Communicate with 1a, 1b. The measurement device 30 is, for example, a PC (Personal Computer), a server, a tablet terminal, a smartphone, or the like, but is not limited thereto. The measuring device 30 may be configured as a system composed of a plurality of servers connected via the network N.

  Note that the configuration of the measurement system 1000 is not limited to the example of FIG. For example, the measurement device 30 may be connected to the network N wirelessly, or the imaging devices 1a and 1b and the measurement device 30 may be connected via a wired or wireless connection without going through the network N. Further, a configuration in which the photographing devices 1a and 1b and the measuring device 30 are not connected so as to communicate with each other is possible.

  Next, the hardware configuration of the imaging devices 1a and 1b and the measuring device 30 will be described. Hereinafter, when the imaging devices 1a and 1b are not distinguished, they are referred to as the imaging device 1. FIG. 2 is a diagram illustrating an example of a hardware configuration of the photographing apparatus 1. 2 includes a CPU (Central Processing Unit) 101, a ROM (Read Only Memory) 102, a RAM (Random Access Memory) 103, a flash memory 104, an input unit 105, a display unit 106, Is provided. In addition, the photographing apparatus 1 includes a communication I / F (interface) 107, a photographing unit 108, and a system bus 109.

  The CPU 101 executes a program and controls the overall operation of the photographing apparatus 1. The function of the photographing apparatus 1 is realized by the CPU 101 executing the program.

  The ROM 102 stores various data including a program executed by the CPU 101.

  The RAM 103 provides a work area for the CPU 101.

  The flash memory 104 is an example of an external storage device, and stores various data including a program executed by the CPU 101. The imaging device 1 may include a removable storage device (such as an SD card) in addition to the flash memory 104.

  The input unit 105 is a device for a user to input information and instructions to the photographing apparatus 1 and includes a touch panel, hardware buttons, dial keys, and the like.

  The display unit 106 is a device for displaying captured images and various screens (such as setting screens), and includes a liquid crystal display, an organic EL (Electro Luminescence) display, a display lamp, and the like.

  The communication I / F 107 is an interface that controls communication with an external device (the AP 20, the measurement device 30, the other imaging device 1, etc.), and communicates with the external device according to a predetermined communication standard. The imaging device 1 communicates with an external device via the communication I / F 107.

  The photographing unit 108 is hardware that performs photographing, and includes an imaging element such as a CCD (Charge Coupled Device) and an optical system. The photographing unit 108 photographs a subject and outputs image data corresponding to the optical image of the subject.

  A system bus 109 connects the CPU 101, ROM 102, RAM 103, flash memory 104, input unit 105, display unit 106, communication I / F 107, and photographing unit 108 to each other.

  The hardware configuration of the measuring device 30 is the same as that shown in FIG. However, the measuring device 30 may not include the photographing unit, may include a hard disk drive (HDD) instead of the flash memory, and may include a keyboard and a mouse as an input unit.

  Next, the functional configuration of the photographing apparatus 1 will be described. FIG. 3 is a diagram illustrating an example of a functional configuration of the photographing apparatus 1. 3 includes a shooting control unit 11, a stereo information storage unit 12, a stereo information setting unit 13, an image file generation unit 14, and an image file storage unit 15. These functional configurations are realized by the CPU 101 executing a program and cooperating with other hardware.

  The shooting control unit 11 controls shooting of a subject. Specifically, the imaging control unit 11 controls the imaging unit 108 in accordance with an input from the user to execute imaging or adjust parameters such as an aperture and focus.

  The stereo information storage unit 12 stores stereo information of the photographing apparatus 1. Stereo information will be described later.

  The stereo information setting unit 13 sets stereo information of the photographing apparatus 1. Specifically, the stereo information setting unit 13 displays a setting screen on the display unit 106 and saves the stereo information input from the user via the setting screen in the stereo information storage unit 12 as the stereo information of its own device. To do. Thereby, the stereo information of the imaging device 1 is set.

  Stereo information is information set by the user in order to use the photographing apparatus 1 as the stereo camera 10. Stereo information is used by the measurement device 30 to select a corresponding image file from a plurality of image files photographed by the plurality of photographing devices 1. The stereo information includes a stereo ID, a reference time, and a device position.

  The stereo ID is identification information unique to the stereo camera 10 and is set separately from the identification information of the photographing apparatus 1. The same stereo ID is set in the photographing devices 1a and 1b constituting the same stereo camera 10.

  The reference time is a reference time for measuring the photographing time of the photographing apparatus 1, and is set separately from the system time of the photographing apparatus 1. The reference time may be an initial value (0 seconds) of the measurement time, or may be a time according to the system time. The same reference time is set for the photographing apparatuses 1a and 1b constituting the same stereo camera 10. However, the reference time set in the photographing apparatuses 1a and 1b may be shifted by about 1 second.

  The device position is position information indicating the relative position of the photographing apparatus 1 in the stereo camera 10. In the photographing apparatus 1a arranged on the left side in the stereo camera 10, the device position is set to “left”. In the photographing apparatus 1b arranged on the right side in the stereo camera 10, the device position is set to “right”.

  Note that the stereo information is not limited to the above example. For example, the stereo information may include a stereo camera name that is the name of the stereo camera 10. The same stereo camera name is set in the photographing apparatuses 1a and 1b constituting the same stereo camera 10. A method for setting stereo information will be described later.

  The image file generation unit 14 creates an image file including image data obtained by shooting, a stereo ID, a shooting time based on the reference time, and a device position each time the shooting unit 108 executes shooting. Generate. When the initial value of the measurement time is set as the reference time, the image file includes an elapsed time from the reference time to the time of shooting as the shooting time. When the reference time is a time corresponding to the system time, the image file includes a time corresponding to the system time at the time of shooting as the shooting time. The image file generation unit 14 stores the generated image file in the image file storage unit 15.

  The image file storage unit 15 stores the image file generated by the image file generation unit 14.

  Next, the functional configuration of the measuring device 30 will be described. FIG. 4 is a diagram illustrating an example of a functional configuration of the measurement device 30. The measurement device 30 in FIG. 4 includes an image file storage unit 31, an image file selection unit 32, a stereo image file generation unit 33, a stereo image file storage unit 34, and a measurement unit 35. Each of these functional configurations is realized by the CPU executing a program.

  The image file storage unit 31 stores image files of a plurality of images photographed by the plurality of photographing devices 1. As described above, each image file includes stereo information including the stereo ID, the photographing time, and the device position of the photographing apparatus 1 that generated the image file. The image file storage unit 31 may store not only image files of images taken by the photographing devices 1a and 1b constituting the stereo camera 10, but also image files of images taken by photographing devices constituting other stereo cameras. .

  The measuring device 30 may receive an image file from the photographing device 1 via the AP 20 and the network N, and the image file of the photographing device 1 is input via a removable storage device (such as an SD card). May be. The method by which the measuring device 30 acquires the image file from each photographing device 1 is arbitrary.

  The image file selection unit 32 selects a corresponding image file from a plurality of image files stored in the image file storage unit 31. Corresponding image files are image files of two images taken simultaneously by the photographing devices 1a and 1b constituting the same stereo camera 10. Since the images corresponding to these two image files correspond to images obtained by simultaneously photographing the same subject from different angles, they can be used as stereo images.

  The image file selection unit 32 selects a corresponding image file based on the stereo ID, shooting time, and device position included in each image file. Specifically, the image file selection unit 32 selects two image files having the same stereo ID, a difference in shooting time within the third threshold T3, and different device positions as corresponding image files. Thereby, it is possible to select an image file of images simultaneously captured by the imaging devices 1a and 1b constituting the same stereo camera 10 as a corresponding image file.

  The reason why the image file having the difference in the shooting time within the third threshold T3 is selected as the image file of the simultaneously shot images is to allow a slight shift in the shooting time in the shooting devices 1a and 1b. Even when the photographing devices 1a and 1b are simultaneously photographed, the photographing time of the photographing devices 1a and 1b is reduced due to a slight shift in shutter timing during photographing and a variation in time measurement accuracy depending on the photographing device 1. Deviation occurs. As described above, by selecting an image file whose difference in shooting time is within the third threshold T3, it is possible to select an image file of simultaneously shot images even when there is a deviation in the shooting time. it can. The third threshold T3 is, for example, 1 second, but is not limited thereto.

  The stereo image file generation unit 33 generates a stereo image file based on the corresponding image file selected by the image file selection unit 32. The stereo image file is an image file in which corresponding image files are collected as one image file. The stereo image file may be an image file obtained by simply synthesizing corresponding image files, or may be an image file synthesized after removing overlapping portions of the corresponding image files. The stereo image file generation unit 33 stores the generated stereo image file in the stereo image file storage unit 34.

  The stereo image file storage unit 34 stores the stereo image file generated by the stereo image file generation unit 33. For example, the stereo image file storage unit 34 stores a stereo image file for each stereo camera 10, but the storage method of the stereo image file is not limited to this.

  Based on the stereo image file stored in the stereo image file storage unit 34, the measurement unit 35 measures the length and area of the subject of the image (stereo image) corresponding to the stereo image file. Specifically, the measurement unit 35 measures the length and area of the subject by analyzing a stereo image corresponding to the stereo image file in response to a request from the user.

  Hereinafter, each configuration of the photographing apparatus 1a will be described with the symbol "a", and each configuration of the photographing apparatus 1b will be described with a symbol "b".

  Next, a method for setting stereo information will be described. FIG. 5 is a sequence diagram illustrating an example of a stereo information setting method.

  As shown in FIG. 5, the user operates the input unit 105a of the photographing apparatus 1a to request the photographing apparatus 1a to display a stereo information setting screen (step S101). Similarly, the user operates the input unit 105b of the photographing apparatus 1b to request the photographing apparatus 1b to display a stereo information setting screen (step S102).

  When the stereo information setting unit 13a receives a setting screen display request from the user, the stereo information setting unit 13a displays the stereo information setting screen on the display unit 106a (step S103). Similarly, when the stereo information setting unit 13b receives a setting screen display request from the user, the stereo information setting unit 13b displays a setting screen for stereo information on the display unit 106b (step S104).

  FIG. 6 is a diagram illustrating an example of a stereo information setting screen. In the example of FIG. 6, a setting screen displayed on the display unit 106a of the photographing apparatus 1a is assumed. In the setting screen of FIG. 6, a stereo ID input field F1, a reference time input field F2, a device position input field F3, an OK button B1, and a Cancel button B2 are displayed. In the example of FIG. 6, “S12345” is input as the stereo ID in the input field F1, “2017/06/22 13:01:00” is input as the reference time in the input field F2, and the input field F3 is input in the input field F3. “Left” is entered as the device position. Such stereo information is input by operating the input unit 105 of the photographing apparatus 1. Note that the stereo information setting screen is not limited to the example of FIG. For example, a stereo camera name input field may be displayed on the setting screen, or each stereo information input field may be displayed on a different page.

  When the setting screen is displayed on the display unit 106a, the user operates the input unit 105a to input a desired stereo ID in the input field F1a (step S105). Similarly, when the setting screen is displayed on the display unit 106b, the user operates the input unit 105b to input a desired stereo ID in the input field F1b (step S106). The user inputs the same stereo ID in the input fields F1a and F1b.

  Next, the user operates the input unit 105a to input a reference time in the input field F2a (step S107). Similarly, the user operates the input unit 105b to input a reference time in the input field F3b (step S108). The user may directly input a reference time value (0 seconds or current time) in the input field F2.

  In addition, in the input fields F2a and F2b, system times of the photographing apparatuses 1a and 1b that can be partially reset (seconds or minutes) by the user may be displayed. In this case, the time when a part is reset by the user (the time according to the system time) is input to the input fields F2a and F2b as the reference time. For example, the user may simultaneously reset the system times of the photographing apparatuses 1a and 1b by simultaneously pressing the shutter buttons of the photographing apparatuses 1a and 1b. Further, the user connects the cable release capable of simultaneously pressing the shutter buttons of the photographing apparatuses 1a and 1b to the photographing apparatuses 1a and 1b, and operates the cable release to simultaneously reset the system time of the photographing apparatuses 1a and 1b. May be.

  Subsequently, the user operates the input unit 105a to input “left” as the device position in the input field F3a (step S109). Similarly, the user operates the input unit 105b to input “right” as the device position in the input field F3b (step S110).

  Thereafter, the user operates the input unit 105a, presses the OK button B1a, and requests the photographing apparatus 1a to set stereo information (step S111). Similarly, the user operates the input unit 105b, presses the OK button B1b, and requests the photographing apparatus 1b to set stereo information (step S112).

  When the stereo information setting unit 13a receives a stereo information setting request from the user, the stereo information setting unit 13a stores the stereo information input in the input fields F1a to F3a in the stereo information storage unit 12a and sets the stereo information as the stereo information of the photographing apparatus 1a. (Step S113). Similarly, when the stereo information setting unit 13b receives a stereo information setting request from the user, the stereo information setting unit 13b stores the stereo information input in the input fields F1b to F3b in the stereo information storage unit 12b, and the stereo information of the photographing apparatus 1b. (Step S114).

  Through the above steps S101 to S114, stereo information is set in the photographing devices 1a and 1b constituting the stereo camera 10, respectively.

  Note that the stereo information setting unit 13 may request the user to reset the reference time when the second threshold T2 has elapsed since the reference time was set. This is because there is a variation in the accuracy of time measurement depending on the photographing device 1, and there is a possibility that the photographing time of the photographing devices 1 a and 1 b measured with reference to the reference time will be shifted after a while after setting the reference time. Because. By periodically resetting the reference time, it is possible to suppress a deviation between the photographing time of the photographing device 1a and the photographing time of the photographing device 1b. The second threshold T2 can be arbitrarily set, and may be, for example, one day or one week. When the second threshold value T2 has elapsed since the reference time was previously set, the stereo information setting unit 13 displays a message requesting resetting of the reference time or a stereo information setting screen on the display unit 106. The resetting of the reference time can be requested.

  Further, as the stereo information, a reference shot number may be set instead of the reference time. In this case, the same number of shots (for example, 0) is set as the reference number of shots in the photographing apparatuses 1a and 1b.

  Next, a stereo image capturing method will be described. FIG. 7 is a sequence diagram illustrating an example of a stereo image capturing method. In the following, it is assumed that stereo information has been set in the photographing apparatuses 1a and 1b.

  As shown in FIG. 7, first, the user operates the input unit 105a to request the photographing apparatus 1a to perform photographing (step S201). At the same time, the user operates the input unit 105b to request the photographing apparatus 1b to perform photographing (step S202). The user may request the photographing devices 1a and 1b to simultaneously photograph by simultaneously pressing the shutter buttons of the photographing devices 1a and 1b. The user connects the cable release capable of simultaneously pressing the shutter buttons of the photographing apparatuses 1a and 1b to the photographing apparatuses 1a and 1b, and operates the cable release to request the photographing apparatuses 1a and 1b to simultaneously photograph. May be.

  When the user requests photographing, the photographing control unit 11a controls the photographing unit 108a to perform photographing (step S203). Similarly, when shooting is requested by the user, the shooting control unit 11b controls the shooting unit 108b to execute shooting (step S204). Thereby, a set of images obtained by simultaneously capturing the same subject from different angles, that is, a stereo image is captured. The imaging controllers 11a and 11b pass the image data output by the imaging units 108a and 108b to the image file generators 14a and 14b, respectively.

  When the image file generation unit 14a receives the image data from the imaging control unit 11a, the image file generation unit 14a reads the stereo information of the imaging device 1a from the stereo information storage unit 12a and generates an image file (step S205). The image file includes image data of an image taken by the photographing unit 108a, a stereo ID of the stereo camera 10, a photographing time based on a reference time set in the photographing device 1a, and a device position of the photographing device 1a. , Is included. Similarly, when the image file generation unit 14b receives the image data from the shooting control unit 11b, the image file generation unit 14b reads the stereo information of the shooting device 1b from the stereo information storage unit 12b and generates an image file (step S206). The image file includes image data of an image taken by the photographing unit 108b, a stereo ID of the stereo camera 10, a photographing time based on a reference time set in the photographing device 1b, and a device position of the photographing device 1b. , Is included.

  After the reference time is set, the image file generation unit 14 may acquire the shooting time by measuring the time based on the reference time. The stereo information storage unit 12 stores the reference time and the system time at the time of setting the reference time in association with each other, and the image file generation unit 14 sets the system time and the reference time at the time of shooting. The shooting time may be calculated by adding the difference from the system time of the hour to the reference time.

  FIG. 8 is a diagram illustrating an example of the data structure of an image file. In the example of FIG. 8, the image file includes SOI (compressed data start), APP1 (application marker segment 1), APP2 (application marker segment 2), DQT (quantization table), and SOF (frame header). The image file includes DHT (Huffman table), SOS (scan header), compressed data (compressed image data), EOI (compressed data end), and calibration data. APP1 includes an APP1 marker, an APP1 length, an Exif identification code, a TIFF header, a 0thIFD, a 0thIFD value, a 1stIFD, a 1stIFD value, 1stIFD image data (thumbnail data), and a manufacturer note. The stereo ID, the shooting time, and the device position are included in, for example, a manufacturer note, but the position including the stereo ID, the shooting time, and the device position is not limited thereto.

  FIG. 9 is a diagram illustrating an example of a manufacturer note. In the example of FIG. 9, a maker note of an image file of the photographing apparatus 1a is assumed. The manufacturer note in FIG. 9 includes a tag code, a UID, a device position, and a stereo camera name. In the example of FIG. 9, the tag code is “stereo camera information” indicating that the subsequent information is information relating to the stereo camera. The UID is “S1234520170622130130” in which the stereo ID and the shooting time are arranged. The device position is “left”. The name of the stereo camera is “stereo camera No. 1”. In the example of FIG. 9, the stereo ID and the shooting time are integrally described as a UID, but the stereo ID and the shooting time may be described separately.

  When the image file generation units 14a and 14b generate image files, the image file generation units 14a and 14b store the image files in the image file storage units 15a and 15b, respectively. Through the above steps S201 to S206, a stereo image is taken by the photographing devices 1a and 1b constituting the stereo camera 10, and a corresponding image file is stored.

  When the reference shot number is set instead of the reference time, the image file generation unit 14 may include the shooting shot number in the image file instead of the shooting time. After the reference shot number is set, the image file generation unit 14 may acquire the number of shot shots by counting the number of shots based on the reference shot number. Further, the stereo information storage unit 12 stores the reference shot number and the actual shot number at the time of setting the reference shot number in association with each other, and the image file generation unit 14 stores the actual shot at the time of shooting. The number of shots may be calculated by adding the difference between the number of shots and the actual number of shots at the time of setting the number of reference shots to the number of reference shots.

  Moreover, it is preferable that the imaging control unit 11 limits the imaging interval by the imaging unit 108 to the first threshold T1 or more. That is, it is preferable that the imaging control unit 11 restricts continuous shooting within the first threshold T1 by the imaging unit 108. Thereby, the difference of the imaging time contained in the several image file produced | generated by the same imaging device 1 can be made more than 1st threshold value T1. As will be described later, the measuring device 30 selects a corresponding image file using the shooting time. For this reason, the measurement device 30 may not be able to select the corresponding image file when the shooting times included in the plurality of image files are close to each other. As described above, by setting the difference between the shooting times included in the plurality of image files generated by the same shooting device 1 to be equal to or greater than the first threshold T1, the measurement device 30 can more reliably correspond to the corresponding image file. It becomes possible to select.

  The imaging control unit 11 may have two operation modes, a normal mode and a stereo mode. The normal mode is an operation mode in which normal photographing is performed by the photographing apparatus 1, and the stereo mode is an operation mode in which a photographing of a stereo image is performed by the photographing apparatus 1. The operation mode is switched by operating the input unit 105.

  As described above, when the shooting control unit 11 has two operation modes, the shooting control unit 11 can limit the shooting interval to the first threshold T1 or more only when the stereo mode is selected. In other words, when the normal mode is selected, the shooting control unit 11 can enable continuous shooting by the shooting unit 108.

  Next, a method for generating a stereo image file will be described. FIG. 10 is a sequence diagram illustrating an example of a method for generating a stereo image file. In the following, it is assumed that a plurality of image files generated by a plurality of imaging devices 1 are stored in the image file storage unit 31.

  As shown in FIG. 10, first, the user requests the measuring device 30 to generate a stereo image file (step S301).

  When the user is requested to generate a stereo image file, the image file selection unit 32 requests an image file from the image file storage unit 31 (step S302), and selects a plurality of image files stored in the image file storage unit 31. Obtain (step S303).

  When the image file selection unit 32 acquires a plurality of image files, the image file selection unit 32 selects a corresponding image file from the plurality of image files (step S304). A method for selecting a corresponding image file will be described later.

  When selecting the corresponding image file, the image file selection unit 32 passes the corresponding image file to the stereo image file generation unit 33 (step S305).

  When the stereo image file generation unit 33 receives the corresponding image file, the stereo image file generation unit 33 generates a stereo image file based on the corresponding image file (step S306). The stereo image file generation unit 33 stores the generated stereo image file in the stereo image file storage unit 34 (step S307).

  The measuring device 30 executes steps S304 to S307 for all the image files stored in the image file storage unit 31. Accordingly, stereo image files corresponding to all the image files stored in the image file storage unit 31 are generated except for an image file having no corresponding image file.

  In the example of FIG. 10, the generation of the stereo image file is executed in response to a request from the user, but may be automatically executed every time the image file is stored in the image file storage unit 31.

  Thereafter, when the user requests the measurement device 30 to measure the subject, the measurement request is notified to the measurement unit 35 (step S308). When the measurement unit 35 is notified of the measurement request, the measurement unit 35 requests the stereo image file storage unit 34 for a stereo image file (step S309), and acquires the stereo image file stored in the stereo image file storage unit 34 (step S309). S310). Then, the measurement unit 35 analyzes the image data of the stereo image included in the acquired stereo image file, and measures the length and area of the subject (step S311).

  Next, a method for selecting a corresponding image file will be described. FIG. 11 is a flowchart illustrating an example of a method for selecting a corresponding image file. The flowchart in FIG. 11 corresponds to the internal processing in step S304 in FIG. Hereinafter, it is assumed that the image file selection unit 32 has already acquired a plurality of image files from the plurality of imaging devices 1.

  First, the image file selection unit 32 selects an image file (hereinafter referred to as “target image file”) as a target for selecting a corresponding image file (step S401). The method for selecting the target image file is arbitrary.

  Next, the image file selection unit 32 refers to the stereo ID included in each image file, and selects an image file having the same stereo ID as the target image file from the plurality of image files (step S402). As a result, the image file generated by the imaging device 1 that configures the same stereo camera 10 as the imaging device 1 that generated the target image file is selected. If there is no image file that includes the same stereo ID as the target image file, the image file selection unit 32 may end the process for the target image file and select the next target image file.

  Next, the image file selection unit 32 selects, from the image files selected in step S402, an image file including a shooting time whose difference from the shooting time of the target image file is within the third threshold T3 (step S403). . Thereby, an image file of an image shot within the third threshold T3 from the shooting of the image corresponding to the target image file is selected. If there is no image file that includes a shooting time that is within the third threshold T3, the image file selection unit 32 also ends the process for the target image file, and the next target image Select a file.

  Subsequently, the image file selection unit 32 selects an image file including a device position different from the device position of the target image file from the image files selected in step S403 (step S404). As a result, an image file generated by another imaging device 1 that configures the same stereo camera 10 as the imaging device 1 that generated the target image file is selected. If there is no image file including a device position different from the device position of the target image file, the image file selection unit 32 may end the process for the target image file and select the next target image file.

  Thereafter, the image file selection unit 32 selects the image file selected in step S404 as an image file corresponding to the target image file (step S405). As a result, the image file selection unit 32 can select two image files having the same stereo ID, a difference in shooting time within the third threshold T3, and different device positions as corresponding image files. .

  The image file selection unit 32 performs steps S401 to S405 until all the image files acquired from the image file storage unit 31 are selected as target image files or image files corresponding to the target image files (NO in step S406). Repeat the process. Accordingly, image files corresponding to all the image files stored in the image file storage unit 31 are selected except for an image file having no corresponding image file.

  Note that a plurality of image files may be selected in step S405. In such a case, the image file selection unit 32 may select an image file with the smallest difference in shooting time as an image file corresponding to the target image file. However, when a plurality of image files having the same difference from the shooting time of the target image file are selected in step S405, the image file corresponding to the target image file is used in the method using the difference in shooting time as described above. Cannot be selected.

  Here, the stereo ID is “S12345”, the shooting time is “9 seconds”, and the image file whose device position is “right” is the image file Im1, the stereo ID is “S12345”, the shooting time is “11 seconds”, and An image file whose device position is “right” is referred to as an image file Im2. When the stereo ID of the target image file is “S12345”, the shooting time is “10 seconds”, and the device position is “left”, both of the image files Im1 and Im2 can be selected in step S405. However, when the image files Im1 and Im2 are selected in step S405, since the difference in shooting time is 1 second, it is not known which of the image files Im1 and Im2 is the image file corresponding to the target image file. Therefore, the image file selection unit 32 fails to select an image file corresponding to the target image file.

  In order to suppress such image file selection failure, the first threshold T1 is preferably set to be longer than twice the third threshold T3 (T1> 2 × T3). By setting the first threshold value T1 and the third threshold value T3 in this way, a plurality of image files are not selected in step S405.

  For example, when the first threshold T1 is 3 seconds and the third threshold T3 is 1 second, the shooting time of the image file Im1 is “9 seconds”, so the shooting time of the image file Im2 is “12 seconds”. Become. Accordingly, in step S405, only the image file Im1 whose shooting time difference is within one second is selected.

  As described above, when a plurality of image files are not selected in step S405, the measurement apparatus 30 can more reliably select an image file corresponding to the target image file.

  As described above, according to the present embodiment, the measuring device 30 is based on the stereo ID, the photographing time, and the device position included in the image file, and is included in the plurality of image files generated by the plurality of photographing devices 1. Therefore, the corresponding image file can be easily selected. In other words, the measuring device 30 easily selects two images simultaneously photographed by the photographing devices 1a and 1b constituting the same stereo camera 10 from a plurality of images photographed by the plurality of photographing devices 1. be able to. The measuring device 30 automatically selects the corresponding image file, thereby reducing the work burden on the user and improving the convenience of the measuring system 1000.

  In addition, according to the present embodiment, the photographing apparatus 1 generates an image file including a stereo ID, a photographing time, and a device position without communicating with another photographing apparatus 1 or communicating with the AP 20. Can do. Therefore, it is not necessary to mount a communication device such as a wireless communication module on the image capturing device 1, so that the manufacturing cost of the image capturing device 1 can be reduced.

  It should be noted that the present invention is not limited to the configuration shown here, such as a combination with other elements in the configuration described in the above embodiment. These points can be changed without departing from the spirit of the present invention, and can be appropriately determined according to the application form.

1: Shooting device 2: Frame 10: Stereo camera 11: Shooting control unit 12: Stereo information storage unit 13: Stereo information setting unit 14: Image file generation unit 15: Image file storage unit 20: AP
30: Measurement device 31: Image file storage unit 32: Image file selection unit 33: Stereo image file generation unit 34: Stereo image file storage unit 35: Measurement unit 1000: Measurement system

JP 2006-270263 A

Claims (10)

A shooting control unit for controlling shooting of a subject;
A stereo information setting unit for setting stereo information including a stereo ID and a reference time;
An image file generation unit that generates an image file including image data obtained by shooting, the stereo ID, and a shooting time based on the reference time;
An imaging device comprising: The imaging apparatus according to claim 1, wherein the reference time is a time corresponding to an initial value of a measurement time or a system time. The imaging apparatus according to claim 1, wherein the imaging control unit limits an imaging interval to a first threshold value or more. The imaging apparatus according to any one of claims 1 to 3, wherein the stereo information setting unit requests resetting of the reference time when a second threshold value elapses from the setting of the reference time. The stereo information includes a device position,
The imaging device according to any one of claims 1 to 4, wherein the image file generation unit generates the image file including the device position. An image file storage unit for storing a plurality of image files including image data, stereo ID, and shooting time;
An image file selection unit that selects the corresponding image file from the plurality of image files based on the stereo ID and the shooting time;
A stereo image file generation unit that generates a stereo image file based on the corresponding image file;
A measuring device comprising: The measurement apparatus according to claim 6, wherein the image file selection unit selects two image files having the same stereo ID and a difference in the photographing time within a third threshold as the image files to be described. The image file includes a device location;
The measurement apparatus according to claim 6, wherein the image file selection unit selects two image files having different device positions as the corresponding image files. The measurement apparatus according to claim 6, further comprising a measurement unit that measures a subject based on the stereo image file. The first photographing device and the second photographing device according to any one of claims 1 to 5,
A measuring device according to any one of claims 6 to 9,
With
The measurement device is connected to the first imaging device and the second imaging device via a network, and receives the image files from the first imaging device and the second imaging device, respectively.

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