JP2011220797A - Electronic camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic camera: in which an image sensor 16 has an imaging surface for capturing a subject and outputs a subject image; in which an LCD driver 26 and an LCD monitor 28 display, on a monitor screen, the subject image output from the image sensor 16; in which a reference object detection circuit 36 searches, in the subject image output from the image sensor 16, an object image representing a reference object having a first predetermined size in a predetermined direction; in which a CPU 40 measures a size of the searched object image as a reference size; in which a graphic generator 34 that displays, on the monitor screen, a reference image defining a second predetermined size in a predetermined direction in relation to the search performed by the reference object detection circuit 36; and in which the CPU 40 calculates, based on the reference size, the first predetermined size, and the second predetermined size, a size of a virtual projection image on which the displayed reference image is virtually projected on a plane orthogonal to an optical axis at a position of the reference object.SOLUTION: A size of a desired object can be measured easily.

Description

  The present invention relates to an electronic camera, and more particularly to an electronic camera that measures the size of an object appearing in an object scene image.

  An example of this type of device is disclosed in Patent Document 1. The digital camera according to this background technology can be freely adjusted to a distance sensor that can measure the distance from the lens to the subject, a distance calculation unit that calculates the signal from the distance sensor to the distance, and an arbitrary part of the subject displayed on the display A cursor, a cursor operation unit for operating the cursor, distance data L measured by the distance sensor, data Xd, Yd of an arbitrary part of the subject displayed on the display determined by the cursor, lens Using the relational expression between the X-axis direction shooting field angle θx and the Y-axis direction shooting field angle θy, which are eigenvalues, the actual size of an arbitrary part of the subject on the plane perpendicular to the shooting direction is measured on the display.

Japanese Patent Application Laid-Open No. 11-344311

  However, in the background art, the electronic camera needs to include a distance sensor. Incorporating the distance sensor into the electronic camera increases the cost of the electronic camera itself, and also prevents the electronic camera from being reduced in size or weight.

  Therefore, a main object of the present invention is to provide an electronic camera that can easily measure the size of a desired object.

  An electronic camera according to the present invention (10: reference numeral corresponding to the embodiment; the same applies hereinafter) has an imaging surface for capturing a scene and is output from the imaging means (16) for outputting the scene image. First display means (26, 28) for displaying the object scene image on the monitor screen, and searching the object image representing the reference object having the first predetermined size in the predetermined direction from the object scene image output from the image pickup means. Search means (36, S35, S37), first measurement means (S41) for measuring the size of the object image found by the search means as a reference size, and a reference image defining a second default size in a predetermined direction Second display means (34, S7) for displaying on the monitor screen in relation to the search processing, and the reference image displayed by the second display means is virtually projected on a plane perpendicular to the optical axis at the position of the reference object The size of the virtual projection image is set to the reference size and the first predetermined size. Calculation means (S43) for calculating based on the second predetermined size is provided.

  Preferably, the apparatus further includes third display means (S45, S73) for displaying an index indicating the size calculated by the calculating means on the monitor screen in association with the display processing of the first display means.

  More preferably, it further comprises a deletion means (S71) for deleting the object image representing the reference object from the object scene image, and the third display means displays the index in connection with the deletion process of the deletion means.

  Preferably, the image processing apparatus further includes recording means (30, 32, S51, S81, S83) for recording the object scene image output from the imaging means and the size calculated by the calculating means in a file format on a recording medium.

  More preferably, the image forming apparatus further includes a creation unit (S49) that creates an image in which the object scene image and the size index are combined, and the recording unit records image data based on the image created by the creation unit on a recording medium. To do.

  More preferably, the recording means records image data based on the object scene image, and records the size in the header of the file.

  Preferably, the reference object is an object with an achromatic pattern, the first predetermined size is the size of the pattern, and the first measuring means evaluates the brightness of the pattern appearing in the object scene image. The reference size is measured by calculating the size of the pattern.

  The size of the desired object in the predetermined direction is such that the reference object and the desired object are arranged in the field, and the size of the object image representing the desired object in the predetermined direction matches the second predetermined size. It is calculated by adjusting the position of the imaging surface in the direction or the zoom magnification. Thereby, the size of a desired object can be easily measured.

  The above object, other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

It is a block diagram which shows the basic composition of this invention. It is a block diagram which shows the structure of one Example of this invention. It is an illustration figure which shows an example of the dictionary which stores the image and reference | standard size which show a reference | standard object. It is an illustration figure which shows an example of a reference | standard object. It is an illustration figure which shows an example of a screen when a guideline is displayed on a screen. It is an illustration figure which shows an example of arrangement | positioning of the object which measures a size, and a reference | standard object. It is an illustration figure which shows the relationship between the object which measures a size, and the screen of a digital camera. It is an illustration figure which shows an example of the state which measures the size of a desired object. It is a block diagram which shows an example of a structure of a reference | standard object detection circuit. It is an illustration figure which shows an example of a search process. It is an illustration figure which shows an example of the measuring method of the pixel count which shows the diameter of the circular part of the reference | standard object which appeared on the imaging surface. It is an illustration figure which shows an example which displays the size of the measured object on the screen of a digital camera. It is a flowchart which shows a part of operation | movement of CPU applied to the FIG. 2 Example. It is a flowchart which shows a part of other operation | movement of CPU applied to the FIG. 2 Example. FIG. 11 is a flowchart showing still another portion of behavior of the CPU applied to the embodiment in FIG. 2; FIG. 10 is a flowchart showing yet another portion of behavior of the CPU applied to the embodiment in FIG. 2; It is an illustration figure which shows another example which displays the size of the measured object on the screen of a digital camera. It is a flowchart which shows a part of operation | movement of CPU applied to another Example. It is a flowchart which shows a part of operation | movement of CPU applied to another Example.

Embodiments of the present invention will be described below with reference to the drawings.
[Basic configuration]

  Referring to FIG. 1, the electronic camera of the present invention is basically configured as follows. The imaging means 1 has an imaging surface that captures the object scene and outputs an object scene image. The first display means 2 displays the object scene image output from the imaging means 1 on the monitor screen. The searching means 3 searches the object image representing the reference object having the first predetermined size in the predetermined direction from the object scene image output from the imaging means 1. The first measuring unit 4 measures the size of the object image found by the searching unit 3 as a reference size. The second display means 5 displays a reference image defining the second default size in the default direction on the monitor screen in association with the search process of the search means 3. The calculating means 6 calculates the size of the virtual projection image obtained by virtually projecting the reference image displayed by the second display means 5 on the plane orthogonal to the optical axis at the position of the reference object, the reference size, the first predetermined size, and the second Calculate based on the default size.

The size of the desired object in the predetermined direction is such that the reference object and the desired object are arranged in the field, and the size of the object image representing the desired object in the predetermined direction matches the second predetermined size. It is calculated by adjusting the position of the imaging surface in the direction or the zoom magnification. Thereby, the size of a desired object can be easily measured.
[Example]

  Referring to FIG. 2, the digital camera 10 of this embodiment includes a focus lens 12 and an aperture unit 14 driven by drivers 18a and 18b, respectively. The optical image of the object scene is irradiated onto the imaging surface of the image sensor 16 through these members.

  When the power is turned on, the CPU 40 activates the driver 18c to execute the moving image capturing process under the imaging task. In response to the vertical synchronization signal Vsync generated every 1/60 seconds, the driver 18c exposes the imaging surface and reads out the charges generated on the imaging surface in a raster scanning manner. From the image sensor 16, raw image data representing the object scene is output at a frame rate of 60 fps.

  The signal processing circuit 20 performs processing such as color separation, white balance adjustment, and YUV conversion on the raw image data from the image sensor 16 to create image data in YUV format. The created image data is written into the SDRAM 24 through the memory control circuit 22.

  The LCD driver 26 repeatedly reads out the image data stored in the SDRAM 24 through the memory control circuit 22 and drives the LCD monitor 28 based on the read image data. As a result, a real-time moving image (through image) representing the scene is displayed on the monitor screen.

  The signal processing circuit 20 also supplies the CPU 40 with Y data generated by YUV conversion. The CPU 40 performs simple AE processing on the Y data and calculates an appropriate EV value. The aperture amount and the exposure time that define the calculated appropriate EV value are set in the drivers 18b and 18c, respectively, and thereby the brightness of the through image is appropriately adjusted.

  Along with the start of the moving image capturing process, the continuous AF task is activated. The CPU 40 integrates high frequency components of some Y data belonging to the evaluation area (not shown) in the Y data output from the signal processing circuit 20 every 1/60 seconds, and calculates an integrated value, that is, a focus evaluation value. To do. The CPU 40 performs so-called continuous AF processing based on the calculated focus evaluation value, and places the focus lens 14 at the focal point. As a result, the sharpness of the moving image output from the LCD monitor 42 is continuously improved.

  When the shutter button 38s is half-pressed, the CPU 40 stops the continuous AF task, performs strict AE processing on the Y data given from the signal processing circuit 20, and calculates the optimum EV value. The aperture amount and the exposure time that define the calculated optimal EV value are set in the drivers 18b and 18c, respectively, as described above. As a result, the brightness of the through image is adjusted strictly.

  Subsequently, the CPU 40 performs AF processing on the high frequency component of the Y data given from the signal processing circuit 20. The focus lens 12 is moved in the optical axis direction by the driver 18a, and is arranged at the focal point. As a result, the sharpness of the through image is improved.

  When the shutter button 38s is fully pressed, the CPU 40 executes a still image capturing process. Image data representing the object scene when the shutter button 38s is fully pressed is saved in a work area (not shown) formed in the SDRAM 24.

  Thereafter, the CPU 40 activates the I / F 30 in order to execute the recording process. The I / F 30 reads the image data saved in the work area through the memory control circuit 22 and records the read image data on the recording medium 32 in a file format. When the recording process is completed, the continuous AF task is activated and the display of the through image is resumed.

  As an operation mode of the digital camera 10, a size measurement mode for performing processing for calculating the size of a desired object is prepared. A dictionary 36d shown in FIG. 3 is provided for processing in the size measurement mode. Further, a reference object STD shown in FIG. 4 is prepared.

  The reference object STD is made of card-like paper and has a pattern in which a white circular portion is arranged inside a black square. An image showing the reference object STD is described in the dictionary 36d. The diameter of the circular portion is described as the reference size SZ_std.

  When the size measurement mode is selected by the operation of the key input device 38 by the operator, the graphic generator 34 outputs graphic data representing the cursor CS1 and graphic data representing the cursor CS2 to the LCD driver 26.

  As a result, the guide line GL including the cursors CS1 and CS2 is drawn on the monitor screen SC of the LCD monitor 28. Referring to FIG. 5, each of cursors CS1 and CS2 is formed of a vertical line segment. The cursor CS1 is displayed on the left side of the screen and the cursor CS2 is displayed on the right side of the screen so as to be parallel to each other. Note that the number of pixels between the cursors CS1 and CS2 is represented by NP_cs.

  Hereinafter, the details of the processing will be described by taking as an example the case of measuring the length from the mouth of the fish FS to the tip of the tail fin (hereinafter referred to as “horizontal size”).

  Referring to FIG. 6, the operator arranges fish FS whose reference size is to be measured and reference object STD side by side on the same plane. At this time, the digital camera 10 is placed close to each other so that they are within the same angle of view. Next, referring to FIG. 7, the operator adjusts his / her standing position while viewing the through image displayed on the monitor screen SC, and the overall image of the fish FS appearing on the monitor screen SC is the guideline GL. Just fit into. In other words, when measuring the length of the fish FS lying in the left direction, adjustment is performed so that the mouth of the fish FS appearing on the imaging surface is in contact with the cursor CS1 and the tip of the tail fin is in contact with the cursor CS2.

  Further, the operator looks at the monitor screen SC and confirms that the fish FS and the reference object STD are within the same angle of view.

  When the shutter button 38s is fully pressed in the state where the size measurement mode is selected, the graphic generator 34 stops outputting graphic data following the still image capturing process, and as a result, the LCD monitor 28 of the guideline GL is stopped. Display stops.

  Next, the CPU 40 activates the reference object detection circuit 36. The reference object detection circuit 36 is configured as shown in FIG.

  The reference object detection circuit 36 moves the verification frame FD in a raster scanning manner from the start position to the end position of the object scene image stored in the SDRAM 24, and registers some images belonging to the verification frame FD in the dictionary 36d. It collates with the image which shows the made reference | standard object STD.

  First, the search area is set so as to cover the entire evaluation area EVA. Further, the verification frame FD has a size that changes in the range of “200” to “20”, and is scanned in the raster direction on the evaluation area EVA in the manner shown in FIG.

  When the image of the verification frame FD matches the registered image, the reference object detection circuit 36 registers the current size and position of the verification frame FD in the register 36e. The collation frame FD is reduced every time it reaches the end position, and then set again at the start position. When the minimum size collation frame FD reaches the end position, a search end notification is returned from the reference object detection circuit 36 to the CPU 40.

  In response to the search end notification returned from the reference object detection circuit 36, the CPU 40 determines whether or not the search for the reference object STD has succeeded. If at least one verification frame FD is registered in the register 36e, it is determined that the search for the reference object STD is successful. On the other hand, if the verification frame FD is not registered in the register 36e, it is determined that the search for the reference object STD has failed.

  When the search for the reference object STD fails, the CPU 40 notifies the operator that the horizontal size of the fish FS cannot be calculated.

  When the search of the reference object STD is successful, the number of pixels NP_std corresponding to the diameter of the circular portion of the reference object STD that appears on the imaging surface is measured. With reference to FIG. 10, when the level of the luminance signal of the reference object STD is projected, the black portion has the minimum value and the white portion has the maximum value. Since the circular portion is white and the periphery thereof is black, the number of pixels NP_std corresponding to the diameter of the circular portion is detected by measuring the number of pixels between the minimum value and the minimum value.

  Returning to FIG. 7, the mouth and tail fin of the fish FS appearing on the monitor screen SC coincide with the cursors CS1 and CS2 forming the guide line GL, respectively. When the guideline GL is virtually projected on a plane orthogonal to the optical axis of the digital camera 10 at the position of the reference object STD, a virtual projection image VGL corresponding to the guideline GL is drawn so as to sandwich the fish FS.

  It is assumed that the virtual projection image VGL includes a virtual projection image VCS1 corresponding to the cursor CS1 and a virtual projection image VCS2 corresponding to the cursor CS2. Then, the horizontal size SZ_obj of the fish FS can be obtained by calculating the distance SZ_vg between the virtual projection images VCS1 and VCS2.

Therefore, the horizontal size SZ_obj of the fish FS is the reference size SZ_std of the reference object STD, the number of pixels NP_std corresponding to the diameter of the circular portion of the reference object STD appearing on the imaging surface, and the number of pixels NP_cs between the cursor 1 and the cursor 2 Is used to calculate the distance SZ_vg between the virtual projected images VCS1 and VCS2 and can be obtained by the following equation (1).

  The CPU 40 causes the LCD monitor 28 to display an index such as a number and a unit indicating the horizontal size SZ_obj of the fish FS obtained as described above on the image representing the object scene read from the SDRAM 24 on the LCD monitor 28. At this time, the indicator is displayed so as to overlap the white circular portion of the reference object STD (see FIG. 11).

  Next, the CPU 40 reads out the image data saved in the work area through the memory control circuit 22. Then, the image relating to the read image data and the display of the index indicating the horizontal size SZ_obj of the fish FS are combined to create recording image data.

  Thereafter, the CPU 40 activates the I / F 30 in order to execute the recording process. The I / F 30 records the created recording image data on the recording medium 32 in a file format. When the recording process is completed, the continuous AF task is activated again, and the LCD 28 returns to the through image display.

  The CPU 40 executes a plurality of tasks including the imaging task shown in FIGS. 12 to 14 and the continuous AF task shown in FIG. 15 in parallel. Note that control programs corresponding to these tasks are stored in the flash memory 44.

  Referring to FIG. 12, the moving image capturing process is started in step S1, and the continuous AF task is activated in step S3. In step S5, it is determined whether or not the operation mode is the size measurement mode. If the determination result is NO, the process proceeds to step S9. If YES, the guideline GL is superimposed on the through image and displayed on the LCD monitor 28 in step S7. Let

  In step S9, it is determined whether or not the shutter button 38s is half-pressed. As long as the determination result is NO, the simple AE process is repeatedly executed in step S11. The brightness of the through image is appropriately adjusted by the simple AE process.

  When the determination result is updated from NO to YES, the continuous AF task is stopped in step S13. In step S15, strict AE processing is executed, and in step S17, AF processing is executed. As a result of the strict AE process and the AF process, the brightness and focus of the through image are strictly adjusted.

  In step S19, it is determined whether or not the shutter button 38s is fully pressed. If the determination result is NO, the process proceeds to step S21, and if YES, the process proceeds to step S23.

  In step S21, it is determined whether or not the shutter button 38s has been released. If the determination result is YES, the process returns to step S3, and if NO, the process returns to step S19.

  In step S23, a still image capturing process is executed, and the image data representing the object scene at the time when the shutter button 38s is fully pressed is saved in the work area formed in the SDRAM 24.

  In step S25, it is determined whether or not the operation mode is the size measurement mode. If the determination result is NO, the process proceeds to step S29, and if YES, the process proceeds to step S33.

  In step S29, the image data saved in the work area of the SDRAM 24 is read through the memory control circuit 22, and in step S31, the read image data is recorded on the recording medium 32 in a file format. After the recording process is completed, the process returns to step S3.

  In step S33, display of the guide line GL on the LCD monitor 28 is stopped, and in step S35, the reference object detection circuit 36 is activated.

  In step S37, in response to the search end notification returned from the reference object detection circuit 36, it is determined whether or not the reference object STD has been successfully searched. If the determination result is YES, the process proceeds to step S41. If NO, the process notifies the operator that the horizontal size of the object cannot be calculated in step S39, and then returns to step S3.

  In step S41, the number of pixels NP_std corresponding to the diameter of the circular portion of the reference object STD appearing on the imaging surface is measured.

  In step S43, the virtual projection image VCS1 is obtained using the reference size SZ_std of the reference object STD, the number of pixels NP_std corresponding to the diameter of the circular portion of the reference object STD appearing on the imaging surface, and the number of pixels NP_cs between the cursors CS1 and CS2. And the distance SZ_vg between the VCS2 and the VCS 2 is calculated, and the horizontal size SZ_obj of the object is measured.

  In step S <b> 45, an index indicating the measured horizontal size SZ_obj of the object is displayed on the LCD monitor 28 so as to overlap the image representing the object scene read from the SDRAM 24.

  In step S47, the image data saved in the work area in step S23 is read through the memory control circuit 22. In step S49, the image related to the read image data and the display of the index indicating the horizontal size SZ_obj of the object are combined to create recording image data.

  In step S51, the recording image data created in step S49 is recorded on the recording medium 32 in a file format. When the recording process is completed, the process returns to step S3.

  Referring to FIG. 15, in step S61, it is determined whether or not the vertical synchronization signal Vsync is generated. If the determination result is updated from NO to YES, it is determined in step S63 whether or not the AF activation condition is satisfied. If “NO” here, the process directly returns to the step S51 while if “YES”, the through image AF process is executed in a step S65, and then, the process returns to the step S61.

  As can be seen from the above description, the image sensor 16 has an imaging surface that captures the object scene and outputs an object scene image. The LCD driver 26 and the LCD monitor 28 display the object scene image output from the image sensor 16 on the monitor screen. The reference object detection circuit 36 searches the object image representing the reference object having the first predetermined size in the predetermined direction from the object scene image output from the image sensor 16 (S35, S37). The CPU 40 measures the size of the object image found by the reference object detection circuit 36 as the reference size (S41). The graphic generator 34 displays a reference image defining the second predetermined size in the predetermined direction on the monitor screen in association with the search process of the reference object detection circuit 36 (S7). The CPU 40 sets the size of the virtual projection image obtained by virtually projecting the reference image displayed by the graphic generator 34 on the plane orthogonal to the optical axis at the position of the reference object to the reference size, the first default size, and the second default size. Based on the calculation (S43).

  The size of the desired object in the predetermined direction is such that the reference object and the desired object are arranged in the field, and the size of the object image representing the desired object in the predetermined direction matches the second predetermined size. It is calculated by adjusting the position of the imaging surface in the direction or the zoom magnification. Thereby, the size of a desired object can be easily measured.

  In this embodiment, the index indicating the horizontal size SZ_obj of the object is displayed on the LCD monitor 28 so as to overlap the image representing the object scene read from the SDRAM 24. At this time, the index is displayed so as to overlap the white circular portion of the reference object STD. However, an image obtained by deleting the object image of the reference object STD from the image representing the object scene may be created, and an index may be displayed over the created image (see FIG. 16).

  For example, the object image of the reference object STD can be deleted from the image by duplicating the surrounding pixels from four directions instead of the pixel of the object image of the reference object STD and performing blurring processing on the joint portion. A technique such as morphing may be used.

  However, in this case, it is necessary to execute steps S71 and S73 shown in FIG. 17 instead of step S45 shown in FIG.

  Referring to FIG. 17, in step S71, an image is created by deleting the object image of reference object STD from the image representing the object scene. In step S73, an index indicating the measured horizontal size SZ_obj of the object is superimposed on the image created in step S71 and displayed on the LCD monitor 28.

  Further, in this embodiment, image data obtained by combining an index indicating the measured object size and the original image is created and recorded. However, the original image may be used as it is for the image data stored in the file, and the size of the object may be described in the file header. In this case, when the image is reproduced, an index indicating the size of the object can be displayed by reading the header.

  However, in this case, it is necessary to execute steps S81 and S83 shown in FIG. 18 instead of steps S49 and S51 shown in FIG.

  Referring to FIG. 18, in step S81, the image data read in step S47 is recorded on the recording medium 32 in a file format. In step S83, the horizontal size SZ_obj of the object measured in step S43 is recorded in the header of the same file. After the recording process is completed, the process returns to step S3.

  In this embodiment, the reference object STD is provided with a pattern in which a white circular portion is arranged inside a black square. However, the black part may be replaced with the white part, and a pattern in which a black circular part is arranged inside a white square may be applied. In this case, the number of pixels NP_std indicating the diameter of the circular portion is detected by measuring the number of pixels between the maximum value of the luminance signal.

  In this embodiment, the horizontal size of a desired object is measured. However, the vertical size may be measured. In this case, each of the cursors CS1 and CS2 may be constituted by a horizontal line segment and displayed so as to be parallel to each other above and below the screen.

  In this embodiment, the size of the measured object is displayed and recorded on the image representing the object scene. However, in addition to this, information other than the size may be displayed and recorded according to the designation of the operator. For example, when the object is a fish, the type of fish, the date of fishing, the location of fishing, and the like may be displayed and recorded.

  The reference object STD used in this embodiment is made of card-like paper, and it is assumed that the operator prints out based on data such as a website. However, other materials such as plastic may be used, or they may be attached as accessories when the digital camera is sold. Moreover, you may make it sell at a fishing tackle store etc.

DESCRIPTION OF SYMBOLS 10 ... Digital camera 16 ... Image sensor 26 ... LCD driver 28 ... LCD monitor 30 ... I / F
32 ... Recording medium 34 ... Graphic generator 36 ... Reference object detection circuit 40 ... CPU

Claims (9)

An imaging means having an imaging surface for capturing an object scene and outputting an object scene image;
First display means for displaying an object scene image output from the imaging means on a monitor screen;
Search means for searching an object image representing a reference object having a first predetermined size in a predetermined direction from an object scene image output from the imaging means;
First measurement means for measuring the size of the object image found by the search means as a reference size;
A second display means for displaying a reference image defining a second predetermined size in a predetermined direction on the monitor screen in association with a search process of the search means; and a reference image displayed by the second display means as the reference object. An electronic camera comprising: calculation means for calculating a size of a virtual projection image virtually projected onto a plane orthogonal to the optical axis at a position based on the reference size, the first default size, and the second default size. The electronic camera according to claim 1, further comprising third display means for displaying an index indicating the size calculated by the calculation means on the monitor screen in association with display processing of the first display means. A deletion unit that deletes an object image representing the reference object from the object scene image;
The electronic camera according to claim 2, wherein the third display unit displays the index in association with the deletion process of the deletion unit. The electronic camera according to claim 1, further comprising a recording unit that records the object scene image output from the imaging unit and the size calculated by the calculating unit in a file format on a recording medium. A creation means for creating an image obtained by combining the object scene image and the index indicating the size;
The electronic camera according to claim 4, wherein the recording unit records image data based on the image created by the creating unit on a recording medium. 5. The electronic camera according to claim 4, wherein the recording unit records image data based on the object scene image, and records the size in a file header. The reference object is an object with an achromatic pattern,
The first predetermined size is the size of the pattern,
The said 1st measurement means measures the said reference | standard size by calculating the magnitude | size of the said pattern by evaluating the brightness | luminance of the said pattern which appeared in the said object scene image. Electronic camera. In the processor of an electronic camera equipped with an imaging means for repeatedly outputting the object scene image generated on the imaging surface that captures the object scene,
A first display step of displaying an object scene image output from the imaging means on a monitor screen;
A search step of searching for an object image representing a reference object having a first predetermined size in a predetermined direction from an object scene image output from the imaging means;
A first measuring step of measuring, as a reference size, the size of the object image found by the searching step;
A second display step of displaying a reference image defining a second predetermined size in a predetermined direction on the monitor screen in association with the search process of the search step; and the reference image displayed by the second display step as the reference object For executing a calculation step of calculating a size of a virtual projection image virtually projected onto a plane orthogonal to the optical axis at the position based on the reference size, the first default size, and the second default size, Size measurement program. A size measurement method executed by an electronic camera including an imaging unit that repeatedly outputs an object scene image generated on an imaging surface that captures an object scene,
A first display step of displaying an object scene image output from the imaging means on a monitor screen;
A search step of searching for an object image representing a reference object having a first predetermined size in a predetermined direction from an object scene image output from the imaging means;
A first measuring step of measuring, as a reference size, the size of the object image found by the searching step;
A second display step of displaying a reference image defining a second predetermined size in a predetermined direction on the monitor screen in association with the search process of the search step; and the reference image displayed by the second display step as the reference object A size measuring method comprising: calculating a size of a virtual projection image virtually projected onto a plane orthogonal to the optical axis at a position based on the reference size, the first default size, and the second default size .

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