JP5157597B2 - Interchangeable lens digital camera, virtual shot image generation method, and virtual shot image display method - Google Patents

Description

  The present invention relates to an interchangeable lens digital camera, a virtual captured image generation method, and a virtual captured image display method.

  The interchangeable lens type single-lens reflex digital camera described in Patent Document 1 can be equipped with various interchangeable lenses according to the shooting scene.

JP 2007-158878 A

  However, for users who are not familiar with single-lens reflex digital cameras, it is common to have no idea what images can be taken simply by looking at the catalog of interchangeable lenses. For this reason, the necessity of an interchangeable lens could not be recognized, or the desired interchangeable lens could not be recognized, so that the ability of a single-lens reflex digital camera could not be fully utilized.

The invention of claim 1 is applied to an interchangeable-lens digital camera including a lens mount to which an interchangeable lens can be attached and detached, and an image sensor that captures an image formed by the interchangeable lens and outputs an imaging signal. A storage unit that stores lens specifications of a non-mounted interchangeable lens that is not mounted on the mount, a captured image based on an imaging signal, lens information acquired from the interchangeable lens mounted on the lens mount, and a lens specification stored in the storage unit A generating unit that generates data related to a virtual captured image assumed when a non-mounted interchangeable lens is mounted on the lens mount, and a display unit that displays the virtual captured image based on the data generated by the generating unit, It is provided with.
According to a second aspect of the present invention, in the interchangeable lens digital camera according to the first aspect, a recording device is provided that records the data generated by the generating unit together with the data of the virtual captured image on a recording medium.
According to a third aspect of the present invention, in the interchangeable lens type digital camera according to the first or second aspect, the image sensor is based on the difference between the focal length of the interchangeable lens mounted on the lens mount and the focal length of the non-mounted interchangeable lens. The data related to the virtual photographed image is generated by zooming up or down the captured image by digital processing.
According to a fourth aspect of the present invention, in the interchangeable lens digital camera according to any one of the first to third aspects, the lens information acquired from the interchangeable lens mounted on the lens mount and the lens specifications of the non-mounted interchangeable lens And a control unit for correcting and controlling the lens state of the interchangeable lens mounted on the lens mount and the imaging condition of the imaging device.
According to a fifth aspect of the present invention, in the interchangeable lens type digital camera according to the fourth aspect, lens specifications relating to a plurality of non-mounted interchangeable lenses are stored in the storage unit, and the selection for selecting one of the plurality of lens specifications is performed. An operation unit is further provided.
The invention of claim 6 is applied to a virtual photographed image display method of an interchangeable lens type digital camera capable of selecting and photographing the first and second interchangeable lenses having at least different optical characteristics. First image data of a subject image captured by the interchangeable lens is generated, and image processing is performed on the first image data based on each lens information of the first interchangeable lens and the second interchangeable lens, Second image data is generated when the second interchangeable lens is used for photographing.
According to a seventh aspect of the present invention, a virtual captured image display method generates display image data based on the second image data generated by the virtual captured image generation method according to the sixth aspect and displays the display image data on a monitor. And

  According to the present invention, by displaying an image based on data relating to a virtual captured image, it is possible to virtually experience a captured image when an interchangeable lens that is not attached is used.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing an embodiment of a camera according to the present invention, and is a block diagram showing a main configuration of an interchangeable lens digital camera. The interchangeable lens 2 is attached to the lens mount 137 of the camera body 1.

(Interchangeable lens 2)
In the present embodiment, the photographing optical system 210 provided in the interchangeable lens 2 constitutes a zoom optical system. By rotating a zoom ring (not shown) provided in the lens barrel of the interchangeable lens 2 and moving the focal length adjusting lens provided in the photographing optical system 210 in the optical axis direction, The focal length can be changed. The position of the focal length adjustment lens in the optical axis direction is monitored by the zoom encoder 220. The AF drive unit 230 is provided with an AF motor and its drive circuit, and the focus lens of the photographic optical system 210 is adjusted by moving the focus lens of the photographic optical system 210 in the optical axis direction by the AF motor. The position of the focus lens is monitored by an AF lens position encoder provided in the AF driving unit 230.

  The diaphragm 240 is an aperture diaphragm that adjusts the amount of light that reaches the image sensor 110 provided in the camera body 1. The diaphragm 240 is opened and closed by the diaphragm driver 250. The setting of the aperture 240 may be performed automatically by the camera or by the photographer, and is controlled by an unillustrated aperture control motor or the like according to the set value. For example, in the program mode or shutter speed priority mode, the aperture value is determined based on the output of the photometric sensor 122. In the aperture priority mode or manual mode, the photographer sets the aperture value.

  Position information monitored by the zoom encoder 220 and the lens position encoder is sent to a lens microcomputer 260 provided in the lens barrel 2. The lens microcomputer 260 controls the AF driving unit 230 and the aperture driving unit 250. The ROM provided in the lens microcomputer 260 stores lens information relating to the interchangeable lens 2, for example, focal length, open F value, aperture value, image shift amount / defocus amount conversion coefficient, and the like. When the interchangeable lens 2 is attached to the lens mount 137 of the camera body 1, the lens microcomputer 260 and the microcomputer 120 on the camera body 1 side are connected via the lens contact 136 provided on the lens mount 137. For example, the lens microcomputer 260 reads the output code of the zoom encoder 220 and transmits information corresponding to the set focal length to the microcomputer 120 of the camera body 1.

(Camera body)
On the other hand, the camera body 1 includes an image sensor 110, a shutter 112, a shutter driving circuit 114 that opens and closes the shutter 112, an AFE (Analog Front End) 116, an image processing circuit 118, a microcomputer 120, a photometric sensor 122, a built-in memory 124, A monitor 126, a display drive circuit 128, a memory card interface 130, an operation unit 132, an external interface 134, and a lens contact 136 are provided. A memory card 138, which is a nonvolatile storage medium, is detachably attached to the camera body 1, and data can be recorded and read out via the memory card interface 130.

  The microcomputer 120 includes a CPU, RAM, ROM, and the like, and controls the entire camera. The photometric sensor 122 is disposed in the vicinity of the optical axis of the eyepiece optical system, and the brightness of the subject image is detected by the photometric sensor 122. The detection result is sent to the microcomputer 120 and is used to determine the shutter speed and aperture value. Although not shown, the operation unit 132 is provided with operation members such as a power button and a release button. The microcomputer 120 performs various controls based on operation signals from the operation unit 132.

  The imaging optical system 210 forms a subject image on the imaging surface of the imaging element 110. The image sensor 110 is configured by a CCD image sensor provided with a plurality of photoelectric conversion elements corresponding to pixels. The image sensor 110 captures a subject image formed on the imaging surface, and outputs a photoelectric conversion signal corresponding to the brightness of the subject image. The image sensor 110 is a color area sensor provided with R (red), G (green), and B (blue) color filters. The photoelectric conversion signal output from the image sensor 110 is color information in the RGB color system. Have

  The AFE (Analog Front End) circuit 116 includes a CDS (correlated double sampling) circuit, an AGC (auto gain control) circuit, an ADC (analog / digital conversion circuit), and a timing generator. Each circuit is supplied with a timing signal from a timing generator. The CDS circuit performs low frequency noise reduction processing of the image signal. The AGC circuit adjusts the level of the imaging signal by adjusting the gain. The analog processed image signal is converted into a digital signal by the ADC and input to the image processing circuit 118.

  The image processing circuit 118 is a circuit for processing a digital signal, and is configured as an ASIC, for example. The image processing circuit 118 performs image processing such as γ correction, white balance correction, and contrast correction on the input image signal, and converts the R, G, and B image data into Y signals corresponding to the luminance signal and the color difference signal. , Cb, Cr image data is converted to YC conversion processing. Further, the image processing circuit 118 performs compression processing for compressing the image data subjected to the YC conversion processing into a predetermined compression format, for example, JPEG format, and adds shooting information to the image data as a tag. The image data to which the shooting information is added is recorded on the attached memory card 138.

  A liquid crystal display panel or the like is used for the monitor 126 and is provided on the back side of the camera body 1. The monitor 126 is driven and controlled by the display drive circuit 128, and can display various information (messages, menus, marks, etc.) and display reproduced images. The external interface 130 transmits / receives data to / from an external device (such as a personal computer) via a cable (not shown) according to an instruction from the microcomputer 120. For example, interchangeable lens catalog information as a virtual interchangeable lens described later is also acquired through the external interface 130 and recorded in the built-in memory 124. Note that an external memory in which interchangeable lens catalog information is recorded may be mounted. The built-in memory 124 is a non-volatile memory such as a flash memory. Lens information read from the lens microcomputer 260 via the lens contact 136 is also recorded in the built-in memory 124.

[Explanation of virtual interchangeable lens mode]
The digital camera of the present embodiment has a virtual interchangeable lens mode as described below. The virtual interchangeable lens mode is a mode for artificially creating a captured image obtained when an interchangeable lens different from the interchangeable lens 2 that is actually mounted is mounted. The user operates the operation unit 132 to display a menu screen for setting the virtual interchangeable lens on the monitor 126. On the virtual interchangeable lens setting screen, a plurality of selectable virtual lens types are displayed. The user enters a virtual interchangeable lens mode by selecting a desired one from a plurality of virtual interchangeable lenses displayed on the setting screen. This virtual interchangeable lens mode is continued until the setting is canceled on the virtual interchangeable lens setting screen.

  For example, when the mounted interchangeable lens 2 has a focal length of 18-55 mm and the user wants to experience an interchangeable lens with a focal length of 18-200 mm, the focal length of 18-200 mm is displayed on the screen on which the interchangeable lens is displayed. It is sufficient to select an interchangeable lens. A plurality of types of lens information (lens specifications) that can be set as virtual interchangeable lenses are recorded in advance in the built-in memory 124 as described above. Note that the lens information for the virtual interchangeable lens may be acquired via the external interface 130 and added to the built-in memory 124.

  The microcomputer 120 reads the lens information of the set interchangeable lens from the built-in memory 124, changes the photographing conditions and corrects the photographed image based on the lens information of the attached interchangeable lens 2 and the read lens information. I do. The details of changing the shooting conditions and correcting the shot image will be described later.

  FIG. 2 is a diagram for explaining an example of a correction method for correcting the angle of view. The horizontal axis in FIG. 2 indicates the ratio (0 to 1) of the operation amount with reference to the zoom operation amount (the rotation operation amount of the zoom ring) from the wide end to the tele end. The vertical axis is the focal length. In FIG. 2, L1 to L3 show the relationship between the operation amount and the focal length, L1 is a zoom lens with a focal length of 18-55 mm, L2 is a zoom lens with a focal length of 18-200 mm, and L3 is a focal length of 24. A zoom lens of −85 mm is shown. Here, description will be made assuming that the zoom lens L1 is mounted as an interchangeable lens.

  When the operation amount of the zoom ring is changed in order of 0.27, 0.46, and 0.73, the focal length changes to 28 mm, 35 mm, and 45 mm in the case of the zoom lens L1. On the other hand, the focal length changes to 40 mm, 52 mm, and 69 mm in the case of the zoom lens L2, and changes to 50 mm, 84 mm, and 133 mm in the case of the zoom lens L3.

  For example, consider a case where the zoom lens L2 is set as a virtual interchangeable lens. At the wide end, since the focal length of the interchangeable lens 2 and the focal length of the virtual lens are 18 mm, the angle of view is also equal. That is, the captured image may be used as an image when the image is captured with the virtual lens as it is. On the other hand, at the tele end, an image 300 (see FIG. 3A) having an angle of view corresponding to a focal length of 55 mm is captured by the image sensor 110. However, since the focal length at the tele end of the virtual interchangeable lens L2 is 200 mm, the image of the angle of view corresponding to the focal length of 200 mm is an image in a range 302 indicated by a broken line in FIG. That is, the image 302 at the tele end of the virtual interchangeable lens L2 as shown in FIG. 3B is obtained by the digital zoom process based on the image data in the range 302 in FIG.

  When shooting is performed by fully pressing the release button, the image 302 shown in FIG. 3B is recorded as a virtual shot image and the image 300 shown in FIG. 3A is recorded as a reference image in the Exif file. Is done. Further, the lens information of the mounted interchangeable lens 2 and the lens information related to the virtual interchangeable lens (for example, the type of lens, focal length 200 mm, etc.) are recorded as tag information. For example, the information on the interchangeable lens mounted and the shooting conditions are recorded in the Exif tag as in the conventional case, and information on the virtual interchangeable lens is stored in the maker note. Instead of recording the image 302 related to the virtual interchangeable lens, the image 300 and information specifying the range of the image 302 in the image 300 may be recorded as tag information. In any case, the user can display or print out an image taken at a focal length of 200 mm on the monitor based on the image 302 and tag information recorded on the memory card.

  Further, since the image observed from the viewfinder is the image shown in FIG. 3A, a mask is applied to the surrounding area surrounding the range 302 as shown by hatching in FIG. Show the shooting range. Thereby, it is possible to easily recognize the subject area to be photographed.

  Note that in the case of a camera equipped with an electronic viewfinder, an image of a portion indicated by a range 302 in FIG. 3A can be displayed on the entire viewfinder as shown in FIG. As a result, despite the fact that the interchangeable lens 2 having a focal length of 18-55 mm is actually mounted, the photographer can actually feel the image in the case of the focal length of 200 mm.

  When the zoom ring is operated to the position where the operation amount = 0.27 in FIG. 2, the focal length of the interchangeable lens 2 becomes 28 mm. At this time, the image picked up by the image pickup device 110 is an image 310 at a focal length of 28 mm shown in FIG. However, when the zoom lens L2 having a focal length of 18 to 200 mm is set as a virtual interchangeable lens, the virtual photographed image is an image 312 as shown in FIG. 4B, which is a portion of the range 312 in FIG. Become. The viewfinder is masked as shown in FIG.

  Incidentally, when the zoom lens L3 (focal length 24-85 mm) shown in FIG. 2 is attached as the interchangeable lens 2 in FIG. 1, the above-described processing is performed when the zoom operation amount is between A and 1 (tele end). A virtual captured image can be formed by performing the same processing as. However, when the zoom operation amount is between A and zero (wide end), the virtual interchangeable lens has a larger angle of view. For example, the focal length of the interchangeable lens 2 mounted at the tele end is 24 mm, but the focal length of the virtual interchangeable lens is 18 mm, and the virtual photographed image 322 is actually captured as shown in FIG. The range becomes larger than the displayed image 320. Therefore, the hatched region B image is not generated, and the image 320 is observed from the optical viewfinder.

  As one of coping methods in such a case, inconvenience can be avoided by making it impossible to select such a virtual interchangeable lens on a menu screen for selecting a virtual interchangeable lens. For example, when the zoom lens L3 is attached as the interchangeable lens 2 in FIG. 2, the virtual interchangeable lens of the zoom lens L1 cannot be selected. Of course, with the zoom lens L3, the range of the focal length of 18 to 24 mm of the zoom lens L1 cannot be taken, but the focal length of 24 to 55 mm can actually be taken.

  As another method, the virtual interchangeable lens function is effective on the telephoto side from the position A shown in FIG. 2, and the virtual interchangeable lens function is invalid when operated to the wide side from the A position. Is displayed in the finder or on the monitor 126.

  Furthermore, as another method, an image as shown in FIG. 5, that is, an image obtained by adding a rectangular frame indicating the range of the virtual photographed image 322 to the image 320 is generated, and the image data is recorded on the memory card 138. In this case, by displaying the focal length of the virtual interchangeable lens in the finder, the user is notified of the focal length condition of the captured image. When the image is reproduced and displayed, the image 320 is displayed in a small size in a rectangular frame as shown in FIG. 5, so that it is possible to actually confirm the state of the image when the image is taken at a focal length of 18 mm. As a result, an overview of the performance of a zoom lens having a focal length of 18-200 mm can be realized, which is a reference when purchasing an interchangeable lens.

  In addition, when a short focus lens is attached as the interchangeable lens 2 and a zoom lens is set as the virtual interchangeable lens, a zoom-up operation function for the two operation buttons provided on the operation unit 132 is provided. Assign a zoom-down operation function. The user operates these operation buttons to virtually zoom up and down. In a zoom region where the focal length of the virtual interchangeable lens is larger than that of the interchangeable lens 2 to which the virtual interchangeable lens is mounted, a part of the captured image is cut out to generate a pseudo photographed image. On the other hand, when the focal length of the virtual interchangeable lens is smaller than that of the interchangeable lens 2, an image in which a rectangular frame as shown in FIG. 5 is formed is generated as a pseudo photographed image by the virtual interchangeable lens.

  In the above description, the processing of the angle of view when the virtual interchangeable lens is set is described. However, in addition to the angle of view, the following processing is performed to reproduce the virtual interchangeable lens. For example, a difference in photographing conditions by the lens is realized in the virtual interchangeable lens. When the brightness of the set virtual interchangeable lens (F value when the aperture is open) is brighter than that of the interchangeable lens 2 attached, the gain of the image sensor 110 is increased to reproduce a bright lens. As a result, it is possible to realize that the shutter speed is increased, and it is also possible to recognize that blurring of the subject due to camera shake is reduced. Conversely, when the F value of the virtual interchangeable lens is larger than that of the mounted interchangeable lens 2, the darkness of the virtual interchangeable lens is reproduced by reducing the aperture 240 to reduce the amount of subject light.

  In addition, it is necessary to adjust the depth of field according to the type of the virtual interchangeable lens. When the depth of field is shallow, low-pass filter processing is digitally performed using a region other than the AF area or a region outside the predetermined region centered on the AF area as a blur region. On the other hand, when the depth of field is increased, a known edge enhancement process is performed on the area.

  When an interchangeable lens provided with a blur correction optical system is set as a virtual interchangeable lens, a known electronic camera shake correction process is performed. For example, 3 × 3 = 9 pixels are regarded as one pixel, and a process in units of nine pixels is performed using an average value of nine pixels as a signal of the pixel. When adjusting the contrast, γ is changed. For example, when the contrast is moderated, a gentler γ curve is used. In addition, by performing image processing on distortion and chromatic aberration, it is possible to reproduce the properties of the virtual interchangeable lens in a pseudo manner.

  FIG. 6 is a flowchart for explaining the operation of the camera in the virtual interchangeable lens mode. The program shown in the flowchart of FIG. 6 is processed by the microcomputer 120 on the body side, and starts when the camera is turned on. In step S1, it is determined whether or not display of the virtual interchangeable lens setting screen has been instructed by operating the operation unit 132. If instructed, the process proceeds to step S2, and if not instructed, the process proceeds to step S20. When the process proceeds to step S20, normal shooting processing that is not in the virtual interchangeable lens mode is executed.

  In step S2, based on the type of the interchangeable lens 2 attached to the camera body 1, the interchangeable lens type that can be set for the virtual interchangeable lens is read from the interchangeable lens catalog (lens specification) stored in the built-in memory 124. The name and model of the interchangeable lens are displayed on the monitor 126 provided on the back side of the camera body 1. In step S3, it is determined whether a virtual interchangeable lens has been selected or whether the setting screen has been terminated without making a selection. If it is determined in step S3 that the setting screen has been completed without making a selection, the process proceeds to step S20, and normal photographing processing is executed. On the other hand, if it is determined in step S3 that the virtual interchangeable lens has been selected, the process proceeds to step S4 to read lens information (lens specifications) of the selected virtual interchangeable lens.

  In step S5, the zoom position information of the mounted interchangeable lens 2 is read from the lens microcomputer 260, and the zoom position of the virtual interchangeable lens corresponding to the zoom position is calculated. Then, the focal length of the virtual interchangeable lens is displayed on the finder, and a mask process as shown in FIG. In step S6, it is determined whether or not the release button has been half-pressed. When it is determined in step S6 that it is half-pressed, the process proceeds to step S7, and a pseudo photographed image is captured using the virtual interchangeable lens based on the lens state of the interchangeable lens 2 and the lens information of the interchangeable lens 2 and the virtual interchangeable lens. The above-described angle of view and shooting conditions are calculated, and AF processing and AE processing are performed.

  In step S8, it is determined whether or not the release button has been fully pressed. If it is determined in step S8 that the button has been fully pressed, the process proceeds to step S9 to perform a photographing process. If it is not determined that the button has been fully pressed, the process proceeds to step S11. In step S10, image data acquired by shooting is recorded on a memory card 138 as a recording medium, and a virtual shot image is displayed on the monitor 126 for a predetermined time. In step S11, it is determined whether or not the power is turned off. If it is determined that the power is not turned off, the process returns to step S5. On the other hand, if it is determined in step S11 that the power has been turned off, the series of processing ends.

  As described above, in the virtual lens mode according to the present embodiment, a virtual captured image when an interchangeable lens different from the mounted interchangeable lens is mounted is generated, and the virtual captured image is displayed on the camera monitor 126. Or recording on a memory card 138. Therefore, it is possible to experience the situation when the interchangeable lens is used without actually mounting the interchangeable lens.

  In the above-described embodiment, the data related to the virtual photographed image is recorded on the memory card. However, the data may be displayed on the monitor without being recorded on the memory card. For example, when purchasing a single-lens reflex digital camera, by displaying a virtual photographed image on a monitor, it is possible to feel an image when it is mounted not only on a standard lens but also on various interchangeable lenses.

  In the above-described embodiment, a virtual photographed image when a virtual interchangeable lens is used is generated in the digital camera and displayed on the monitor 126. However, a virtual photographed image is generated as follows. Anyway. That is, the captured image data of the digital camera equipped with the interchangeable lens 2 and the lens information of the virtual interchangeable lens are taken into an external device (for example, a personal computer), and a virtual captured image is generated in the external device. It is assumed that software for generating a virtual captured image is installed in advance in the external device.

Since the shooting conditions (shooting date and lens information) are added to the shot image data file (Exif file) as tag information along with the image data, the added lens information (lens information of the attached interchangeable lens) is added. And a virtual photographed image can be generated from the lens information of the virtual interchangeable lens. Then, by displaying the virtual captured image generated on the monitor provided in the external device, it is possible to experience the captured image when the virtual interchangeable lens is used.

  Note that, when displaying an image as shown in FIG. 3B, in the method of actually cutting out the image of the region 302 from the captured image 300 of FIG. When the data of the image 302 is read into the PC and displayed on the monitor, the virtual captured image 302 may be displayed as it is. On the other hand, in the case of a method in which only the data related to the virtual captured image 302 such as the cutout region 302 is generated without generating the virtual captured image 302, the image display software on the PC side relates to the data of the captured image 300 and the virtual captured image 302. A virtual captured image is generated based on the data and displayed on the monitor.

  In addition, the above description is an example to the last, and this invention is not limited to the said embodiment at all unless the characteristic of this invention is impaired.

It is a figure which shows one Embodiment of the camera by this invention, and is a block diagram which shows the principal part structure of an interchangeable lens type digital camera. It is a figure explaining an example of the correction method in the case of correcting an angle of view. It is a figure explaining the picked-up image and virtual picked-up image in a tele end, (a) shows a picked-up image, (b) shows a virtual picked-up image, (c) shows the to-be-observed object from a finder. It is a figure explaining the picked-up image and virtual picked-up image in the wide side, (a) shows a picked-up image, (b) shows a virtual picked-up image, (c) shows the to-be-observed object from a finder. It is a figure explaining the case where a focal length is smaller (an angle of view is larger) than the interchangeable lens with which the virtual interchangeable lens is actually mounted | worn. It is a flowchart explaining operation | movement of virtual interchangeable lens mode.

Explanation of symbols

1: camera body, 2: interchangeable lens, 110: image sensor, 112: shutter, 118: image processing circuit, 120: microcomputer, 124: built-in memory, 126: monitor, 130: memory card interface, 132: operation unit, 134 : External interface, 137: lens mount, 138: memory card, 210: photographing optical system, 240: aperture, 260: lens microcomputer,

Claims (7)

In an interchangeable lens type digital camera comprising a lens mount to which an interchangeable lens can be attached and an image sensor that captures an image formed by the interchangeable lens and outputs an imaging signal.
A storage unit for storing lens specifications of a non-attached interchangeable lens that is not attached to the lens mount;
When the non-mounted interchangeable lens is mounted on the lens mount based on the captured image based on the captured image signal, the lens information acquired from the interchangeable lens mounted on the lens mount, and the lens specifications stored in the storage unit A generation unit that generates data related to a virtual captured image assumed in
An interchangeable-lens digital camera comprising: a display unit that displays the virtual photographed image based on data generated by the generation unit. In the interchangeable lens type digital camera according to claim 1,
An interchangeable-lens digital camera comprising: a recording device that records data generated by the generation unit together with data of the captured image on a recording medium. The interchangeable lens type digital camera according to claim 1 or 2,
The generation unit zooms up or down the captured image by digital processing based on the difference between the focal length of the interchangeable lens attached to the lens mount and the focal length of the non-attached interchangeable lens, An interchangeable-lens digital camera that generates data related to a virtual photographed image. In the interchangeable lens type digital camera according to any one of claims 1 to 3,
Based on the lens information acquired from the interchangeable lens attached to the lens mount and the lens specifications of the non-attached interchangeable lens, the lens state of the interchangeable lens attached to the lens mount and the imaging conditions of the image sensor An interchangeable-lens digital camera comprising a control unit that performs correction control. In the interchangeable lens type digital camera according to claim 4,
The storage unit stores lens specifications related to a plurality of non-mounted interchangeable lenses, respectively.
An interchangeable-lens digital camera, further comprising a selection operation unit that selects any of the plurality of lens specifications. In a virtual captured image display method of an interchangeable lens type digital camera capable of selecting and photographing at least first and second interchangeable lenses having optical characteristics different from each other,
Generating first image data of a subject image captured by the first interchangeable lens;
Based on the lens information of the first interchangeable lens and the second interchangeable lens, the second image when the first image data is subjected to image processing and photographed with the second interchangeable lens. A virtual captured image generation method for generating image data. A virtual captured image display method for generating display image data based on the second image data generated by the virtual captured image generation method according to claim 6 and displaying the generated image data on a monitor.

Images