JP2014206592A - Imaging device, and control method and program of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To photograph a still image at a field angle according to the intention of a user in an imaging device having a discrete still image photographable field angle when receiving instructions to photograph still images at a timing in which a display field angle during live viewing is different from the still image photographable field angle.SOLUTION: When an imaging device receives instructions to photograph still images, while changing the magnification of an image output from an imaging element 14 during live viewing to continuously change a display field angle, and cannot photograph still images at the same field angle as the display field angle during the live viewing, the imaging device selects one of the following field angles closer to the display field angle during the live viewing: the still image photographable field angle on the wide angle side closest to the display field angle during the live viewing; and the still image photographable field angle on the telephoto side closest to the display field angle during the live viewing.

Description

  The present invention relates to an imaging apparatus that performs live view electronic zoom that continuously changes a display angle of view by scaling an image output from an imaging device during a live view, and a control method and program thereof.

In digital cameras with built-in or mountable digital video camcorders or lenses, image data is reduced or enlarged by signal processing together with optical scaling means (hereinafter referred to as optical zoom) that optically converts the magnification of the image. A device equipped with an electronic zooming means (hereinafter referred to as an electronic zoom) is common.
In particular, in a compact digital camera, the zoom lens is often a step zoom lens that can be stopped only stepwise at a predetermined zoom position. In this case, since the zoom position is a finite number, a detection function for detecting the focal length of the photographing lens with high accuracy becomes unnecessary. Further, the zoom operation and the focus operation can be performed by the same driving means depending on the setting method of the cam shape of the lens barrel, which contributes to miniaturization and cost reduction.

On the other hand, regarding a digital camera having an electronic zoom function, Patent Document 1 discloses a camera capable of zooming at a free magnification by combining pseudo zoom even when the optical zoom magnification is discrete.
However, in a camera that can set a free magnification, there is a problem that it is difficult to return to the same magnification as the previous magnification when the zoom magnification is changed. For this reason, even when an electronic zoom is provided, some cameras, such as a step zoom lens, permit photographing only at discrete magnifications when photographing a still image.
For example, when an electronic zoom start operation is performed from the wide side to the tele side during live view, the magnification is continuously changed, and the magnification changes smoothly. Here, when the electronic zoom stop operation is performed, a camera is provided that continuously changes the magnification until a magnification that enables next still image shooting is reached, and stops the change in magnification when the magnification that enables still image shooting is reached. Yes.

JP-A-11-242283

  However, with a camera such as that described above, if a still image shooting operation is performed while the magnification of the electronic zoom is being changed, shooting cannot be performed until the magnification at which still image shooting is possible, or shooting is performed at an angle not intended by the photographer. There was a problem.

  The present invention has been made in view of the above points, and in an imaging device in which the angle of view that can shoot still images is discrete, the display angle of view of live view and the angle of view that can shoot still images are different. It is an object of the present invention to capture an image with an angle of view according to the user's intention when a still image capturing instruction is given at the timing.

  An image pickup apparatus according to the present invention is an image pickup apparatus that includes an image pickup element that converts a subject image into an image signal, and that performs a live view in which an image output from the image pickup element is periodically displayed on a display unit. An angle-of-view determination unit that determines an angle of view when shooting, and the angle-of-view determination unit continuously changes the display angle of view by scaling the image output from the image sensor during live view. If still image shooting is not possible with the same angle of view as the live view display angle when a still image shooting instruction is given, still image shooting closest to the live view display angle is possible on the wide angle side. A field angle or a field angle at which a still image can be photographed closest to the display field angle of the live view on the telephoto side is selected.

  According to the present invention, when a still image shooting instruction is given at a timing when the view angle of the live view and the angle of view capable of shooting a still image differ from each other in an imaging device in which the angle of view that can capture a still image is discrete. The image can be taken at an angle of view that matches the user's intention.

It is a figure which shows the structure of the imaging device which concerns on 1st Embodiment. It is a flowchart which shows the processing operation at the time of the live view of a digital camera. It is a flowchart which shows the still image magnification determination process in 1st Embodiment. It is a flowchart which shows the still image magnification determination process in 2nd Embodiment. It is a flowchart which shows the still image magnification determination process in 3rd Embodiment. It is a flowchart which shows the still image magnification determination process in 4th Embodiment. It is a flowchart which shows the still image magnification determination process in 5th Embodiment. It is a flowchart which shows the still image magnification determination process in 6th Embodiment.

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.
(First embodiment)
FIG. 1 is a diagram illustrating a configuration of an imaging apparatus according to the first embodiment. In the present embodiment, a single-lens reflex digital camera capable of exchanging lenses will be described as an example of an imaging apparatus. However, the present invention can also be applied to a digital camera incorporating a lens.
As shown in FIG. 1, the imaging apparatus according to the present embodiment mainly includes a camera body 100 and an interchangeable lens type lens unit 300.

  In the lens unit 300, reference numeral 310 denotes an imaging lens composed of a plurality of lenses. Reference numeral 312 denotes an aperture. A lens mount 306 mechanically couples the lens unit 300 to the camera body 100. The lens mount 306 includes various functions for electrically connecting the lens unit 300 to the camera body 100. In the lens mount 306, 320 is an interface for connecting the lens unit 300 to the camera body 100, and 322 is a connector for electrically connecting the lens unit 300 to the camera body 100. The connector 322 transmits a control signal, a status signal, a data signal, and the like between the camera body 100 and the lens unit 300, and also has a function of supplying currents of various voltages. Further, the connector 322 may be configured to perform communication using not only electrical communication but also optical communication, voice communication, and the like.

  Reference numeral 340 denotes an aperture control unit that controls the aperture 312 in cooperation with the exposure control unit 40 that controls the shutter 12 based on an aperture drive instruction from the exposure control unit 48 of the camera body 100. A focus control unit 342 controls focusing of the imaging lens 310. A zoom control unit 344 controls zooming of the imaging lens 310. The zoom control unit 344 performs optical zoom by driving a motor (not shown) by operating the operation unit 70 provided in the camera body 100.

  A lens system control circuit 350 controls the entire lens unit 300. A memory 58 stores constants, variables, programs, and the like for the operation of the lens system control circuit 350. Further, the memory 58 holds identification information such as a number unique to the lens unit 300, management information, function information such as an open aperture value, minimum aperture value, focal length, and various lens information such as current and past set values.

  In the camera body 100, a lens mount 106 mechanically couples the camera body 100 with the lens unit 300. Reference numerals 130 and 132 denote mirrors, which guide light beams incident through the imaging lens 310 to the optical viewfinder 104 by a single lens reflex system. The mirror 130 may be either a quick return mirror or a half mirror. Reference numeral 12 denotes a focal plane shutter. Reference numeral 14 denotes an image sensor for converting a subject image into an image signal, which includes a CCD, a CMOS sensor, and the like. An optical element 14 a such as an optical low-pass filter is disposed in front of the image sensor 14. Light rays that have entered through the imaging lens 310 and the diaphragm 312 are guided through the lens mounts 306 and 106, the mirror 130, and the shutter 12 by a single-lens reflex method, and are formed on the imaging device 14 as an optical image.

  Reference numeral 15 denotes a microphone. Reference numeral 16 denotes an A / D converter, which converts an analog signal (output signal) output from the image sensor 14 into a digital signal, and converts an analog signal (output signal) output from the microphone 15 into a digital signal. . A timing generation circuit 18 supplies a clock signal and a control signal to the image sensor 14, the A / D converter 16, and the D / A converter 26, respectively. The timing generation circuit 18 is controlled by the memory control circuit 22 and the system control circuit 50.

  A correction coefficient calculation unit 112 calculates a parameter for shading correction according to the characteristics of the image sensor 14. Further, the correction coefficient calculation unit 112 calculates correction parameters such as peripheral light amount correction, peripheral distortion correction, and peripheral chromatic aberration correction. For example, when the peripheral light amount correction is described as an example, lens information is acquired from the memory 58 built in the lens unit 300. The lens information includes a correspondence table of the deviation from the optical center and the light attenuation rate, the minimum aperture value, the aperture diameter, the focal length, the current aperture value, and the like. The correction parameter calculated here is set in the image processing circuit 20 by the system control circuit 50.

An image processing circuit 20 performs predetermined pixel interpolation processing and color conversion processing on the data from the A / D converter 16 or the data from the memory control circuit 22. At this time, various corrections are performed according to the correction parameters calculated by the correction coefficient calculation unit 112. Further, the image processing circuit 20 performs predetermined arithmetic processing using the image data output from the A / D converter 16 as necessary. The system control circuit 50 controls the exposure control unit 40 and the distance measurement control unit 42 on the basis of the obtained calculation result, so that contrast-type autofocus (AF) processing, automatic exposure (AE) processing, flash pre-flash ( EF) process. Further, the image processing circuit 20 performs predetermined calculation processing using the image data output from the A / D converter 16 and also performs TTL auto white balance (AWB) processing based on the obtained calculation result.
Reference numeral 21 denotes an audio processing circuit, which performs predetermined processing such as noise cancellation processing for reducing wind noise and noise of the diaphragm 312 as necessary for data from the A / D converter 16 or data from the memory control circuit 22. Perform audio processing. The audio processing circuit 21 also performs AGC to automatically control the gain based on the obtained calculation result.

A memory control circuit 22 is an A / D converter 16, a timing generation circuit 18, an image processing circuit 20, an audio processing circuit 21, an image display memory 24, a D / A converter 26, a memory 30, and a compression / decompression circuit 32. To control. The image data output from the A / D converter 16 is sent to the image display memory 24 and the sound reproduction memory via the image processing circuit 20, the sound processing circuit 21, the memory control circuit 22, or only through the memory control circuit 22. 25 or the memory 30.
Reference numeral 24 denotes an image display memory. Reference numeral 26 denotes a D / A converter. An image display unit 28 includes a TFT type LCD. The display image data written in the image display memory 24 is displayed by the image display unit 28 via the D / A converter 26. An electronic viewfinder (EVF) function can be realized by sequentially displaying captured image data using the image display unit 28. Further, the image display unit 28 can arbitrarily turn on / off the display according to an instruction from the system control circuit 50, and when the display is turned off, the power consumption of the camera body 100 can be significantly reduced. it can. A communication interface (not shown) may be provided. For example, an HDMI (High-Definition Multimedia Interface (registered trademark)) interface that can be connected to and communicate with a high-resolution television or the like can be used. By using this to communicate image data in the camera, it is possible to display not only on the image display unit 28 but also on an external television. In addition to image data, it is also possible to send and receive commands to and from the television by CEC (Consumer Electronics Control). Commands transmitted and received by CEC include the power state of the television, the start of playback, the end of playback, and the operation of the remote controller.
Reference numeral 25 denotes an audio reproduction memory. Reference numeral 29 denotes an audio reproduction unit including a speaker or the like. The audio data for reproduction written in the audio reproduction memory 25 is output by the audio reproduction unit 29 via the D / A converter 26.

Reference numeral 30 denotes a memory for storing captured still image or moving image data, and has a storage capacity sufficient to store a predetermined number of still images or a predetermined amount of moving images. This makes it possible to write a large amount of images to the memory 30 at high speed even in continuous shooting or panoramic shooting in which a plurality of still images are continuously shot. The memory 30 is used as a frame buffer for images that are continuously written at a predetermined rate during moving image shooting. Further, the memory 30 can be used as a work area for the system control circuit 50.
A compression / decompression circuit 32 compresses / decompresses image data using a known compression method. The compression / decompression circuit 32 reads an image stored in the memory 30, performs a compression process or an expansion process, and writes the processed data to the memory 30 again. It also has a function of compressing and encoding moving image data in a predetermined format and expanding a moving image signal from predetermined compression-encoded data.

Reference numeral 40 denotes an exposure control unit that controls the shutter 12 in cooperation with an aperture control unit 340 that controls the aperture 312 based on an accumulation time instruction from the exposure control unit 48.
Reference numeral 42 denotes a distance measurement control unit for performing AF processing. A light beam incident on the imaging lens 310 in the lens unit 300 is made incident as a single lens reflex system through a diaphragm 312, lens mounts 306 and 106, a mirror 130, and a focus adjustment sub-mirror (not shown), thereby forming an optical image. The in-focus state of the captured image is measured.
A photometry control unit 46 performs AE processing. A light beam incident on the imaging lens 310 in the lens unit 300 is made incident as an optical image by being incident by a single lens reflex system through a diaphragm 312, lens mounts 306 and 106, a mirror 130, and a photometric sub mirror (not shown). The photometric state of the imaged image is measured. In a live view in which an image formed on the image sensor 14 is continuously converted into an electrical signal and displayed, the photometric state is measured from a histogram or the like of the obtained image. At this time, the photometric state is measured by weighting the center of the screen or the focus area.
An exposure control unit 48 determines the optimum ISO sensitivity, aperture value, and shutter speed from the photometric state of the photometric control unit 46. Then, the shutter speed is instructed to the exposure control unit 40 based on the determined optimum ISO sensitivity, aperture value, and shutter speed, and the aperture value is instructed to the aperture control unit 340 of the lens unit 300 through the interface 120. Further, the ISO sensitivity is instructed to the image sensor 14 and the image processing circuit 20, and control is performed so as to obtain an optimum exposure. In the live view, the shutter 12 is always open, and the exposure control unit 48 instructs the image sensor 14 to store the accumulation time, and controls the accumulation time using the electronic shutter. The AF control may be performed using the measurement result obtained by the distance measurement control unit 42 and the calculation result obtained by calculating the image data from the A / D converter 16 by the image processing circuit 20. Further, exposure control may be performed using the measurement result obtained by the photometry control unit 46 and the calculation result obtained by calculating the image data from the A / D converter 16 by the image processing circuit 20.

  A system control circuit 50 controls the entire camera body 100 and incorporates a CPU and the like. A memory 52 stores constants, variables, programs, and the like for operating the system control circuit 50.

A notification unit 54 notifies the outside of the operation state, message, and the like using characters, images, sounds, and the like in accordance with the execution of the program in the system control circuit 50. As the notification unit 54, for example, a display unit that performs visual display using an LCD, an LED, or the like, a sound generation element that performs notification by voice, and the like are used. The notification unit 54 is configured by a combination of one or more of these. . In particular, in the case of a display unit, it is installed at a single or a plurality of locations near the operation unit 70 that are easy to view. In addition, the notification unit 54 has a part of its function installed in the optical viewfinder 104.
Among the display contents of the notification unit 54, the following are displayed on the image display unit 28. First, there are displays relating to shooting modes such as single-shot / continuous-shot shooting display and self-timer display. In addition, there are displays relating to recording such as compression rate display, recording pixel number display, recording number display, and remaining image number display. In addition, there are displays relating to photographing conditions such as shutter speed display, aperture value display, exposure correction display, dimming correction display, external flash emission amount display, and red-eye reduction display. In addition, there are a macro photographing display, a buzzer setting display, a battery remaining amount display, an error display, an information display by a multi-digit number, and a recording medium 200 attachment / detachment state display. Furthermore, the attachment / detachment state display of the lens unit 300, the communication interface operation display, the date / time display, the display indicating the connection state with the external computer, and the like are also performed. Among the display contents of the notification unit 54, the following are displayed in the optical viewfinder 104. In-focus display, shooting preparation completion display, camera shake warning display, flash charge display, flash charge completion display, shutter speed display, aperture value display, exposure correction display, recording medium writing operation display, and the like.

Reference numeral 56 denotes an electrically erasable / recordable non-volatile memory, such as an EEPROM, which retains programs and the like, which will be described later, current setting values, and the like.
Reference numeral 66 denotes an electronic zoom control unit.

Reference numerals 60, 62, 64, 65, and 70 denote operation means for inputting various operation instructions of the system control circuit 50, and include one or a plurality of switches, dials, touch panels, pointing by line-of-sight detection, voice recognition devices, and the like. Composed of a combination.
Reference numeral 60 denotes a mode dial switch for switching and setting each function shooting mode such as an automatic shooting mode, a program shooting mode, a shutter speed priority shooting mode, an aperture priority shooting mode, a manual shooting mode, and a focus depth priority (depth) shooting mode. Can do. In addition, it is also possible to switch and set each function shooting mode such as a portrait shooting mode, a landscape shooting mode, a close-up shooting mode, a sports shooting mode, a night scene shooting mode, a panoramic shooting mode, and a moving image recording mode.
Reference numeral 62 denotes a shutter switch SW1, which is turned on while a shutter button (not shown) is being operated (for example, half-pressed), and instructs to start operations such as AF processing, AE processing, and AWB processing.
Reference numeral 64 denotes a shutter switch SW2, which is turned on when an operation of a shutter button (not shown) is completed (for example, fully pressed), and instructs operation start of a series of processes including exposure processing, development processing, and recording processing. First, in the exposure process, the mirror 130 and the shutter 12 are driven to form an image of the subject on the image sensor 14. Subsequently, in the development processing, a signal read from the image sensor 14 is written into the memory 30 via the A / D converter 16 and the memory control circuit 22, and further computations in the image processing circuit 20 and the memory control circuit 22 are used. Perform development processing. In the recording process, the image data is read from the memory 30, compressed by the compression / decompression circuit 32, written to the recording medium 200, or transmitted to a computer connected via the interface 90.
When the mode dial switch 60 is switched to the moving image shooting mode, the exposure processing and development processing described above are performed, and the image stored in the memory 30 is converted into an analog signal by the D / A converter 26 and displayed on the image display unit 28. To do. This operation is repeated, for example, about 30 times per second to perform a so-called live view function.
Reference numeral 65 denotes a moving image recording switch. When the moving image recording switch 65 is pressed, an audio signal read from the microphone 15 is written to the memory 30 via the A / D converter 16 and the memory control circuit 22 in addition to the above-described image processing. . The previous image data and audio data are read from the memory 30, compressed by the compression / decompression circuit 32, written to the recording medium 200, or transmitted to an externally connected computer or the like via the interface 90.
An operation unit 70 includes various buttons and a touch panel. For example, menu button, set button (decision button), multi-screen playback page break button, flash setting button, single / continuous / self-timer switching button, menu move + (plus) button, menu move-(minus) button including. Further, playback image movement + (plus) button, playback image movement-(minus) button, shooting image quality selection button, exposure compensation button, dimming compensation button, external flash light intensity setting button, date / time setting button, zoom operation button, etc. Including. The functions of the plus button and the minus button can be selected more easily with numerical values and functions by providing a rotary dial switch. In addition, there is an image display ON / OFF switch for setting ON / OFF of the image display unit 28, and a quick review ON / OFF switch for setting a quick review function for automatically reproducing image data taken immediately after shooting. In addition, there is a compression mode switch that is a switch for selecting a compression rate of JPEG (Joint Photographic Experts Group) compression or for selecting a RAW mode in which a signal of the image sensor 14 is digitized and recorded on a recording medium. In addition, there is an AF mode setting switch capable of setting a one-shot AF mode and a servo AF mode. In the one-shot AF mode, an autofocus operation is started when the shutter switch SW1 (62) is pressed, and once focused, the focused state is maintained. In the servo AF mode, the autofocus operation is continued while the shutter switch SW1 (62) is being pressed.

  A power control unit 80 includes a battery detection circuit, a voltage detection circuit, a DC-DC converter, a switch circuit that switches a block to be energized, and the like. The power supply control unit 80 detects the presence / absence of a battery, the type of battery, and the remaining battery level, controls the DC-DC converter based on the detection result and the instruction of the system control circuit 50, and requires the necessary voltage. It is supplied to each part including the recording medium for a period. 82 and 84 are connectors. A power supply unit 86 includes a primary battery such as an alkaline battery or a lithium battery, a secondary battery such as a NiCd battery, a NiMH battery, a Li-ion battery, or a Li polymer battery, an AC adapter, or the like.

  Reference numeral 90 denotes an interface with a recording medium such as a memory card or a hard disk or a PC. Reference numeral 92 denotes a connector for connecting to a recording medium such as a memory card or a hard disk or a PC. Reference numeral 98 denotes a recording medium attachment / detachment detection circuit, and an interface and connector for detecting whether or not the recording medium 200 is attached to the connector 92 can be configured using ones that comply with various storage medium standards. It is. For example, a PCMCIA (Personal Computer Memory Card International Association) card, a CF (Compact Flash (registered trademark)) card, an SD card, or the like. When the interface 90 and the connector 92 are configured using a standard conforming to a PCMCIA card, a CF card, or the like, various communication cards can be connected. Communication cards include LAN cards, modem cards, USB (Universal Serial Bus) cards, and IEEE (Institute of Electrical and Electronic Engineers) 1394 cards. In addition, there are P1284 card, SCSI (Small Computer System Interface) card, PHS (Personal Handy-phone System), and the like. By connecting these various communication cards, image data and management information attached to the image data can be transferred to and from other computers and peripheral devices such as a printer.

  Reference numeral 104 denotes an optical viewfinder, which guides a light beam incident on the imaging lens 310 through a diaphragm 312, lens mounts 306 and 106, and mirrors 130 and 132 by a single lens reflex method, and forms an optical image for display. it can. As a result, it is possible to perform shooting using only the optical viewfinder 104 without using the electronic viewfinder function of the image display unit 28. In the optical viewfinder 104, some functions of the notification unit 54, for example, in-focus state, camera shake warning, flash charging, shutter speed, aperture value, exposure correction, and the like are displayed.

  Reference numeral 120 denotes an interface for connecting the camera body 100 to the lens unit 300. A connector 122 electrically connects the camera body 100 to the lens unit 300. Whether or not the lens unit 300 is attached to the lens mount 106 and the connector 122 is detected by a lens attachment / detachment detection unit (not shown). The connector 122 transmits a control signal, a status signal, a data signal, and the like between the camera body 100 and the lens unit 300, and also has a function of supplying currents of various voltages. The connector 122 may be configured to perform communication using not only electrical communication but also optical communication, voice communication, and the like.

  Reference numeral 200 denotes a recording medium such as a memory card or a hard disk. The recording medium 200 includes a recording unit 202 composed of a semiconductor memory, a magnetic disk, or the like, an interface 204 with the camera body 100, and a connector 206 for connecting with the camera body 100. As the recording medium 200, a memory card such as a PCMCIA card or compact flash (registered trademark), a hard disk, or the like can be used. Of course, it may be composed of a micro DAT, a magneto-optical disk, an optical disk such as a CD-R or CD-RW, a phase change optical disk such as a DVD.

  The digital camera configured as described above includes the image sensor 14 that converts a subject image into an image signal, and an A / D converter 16 converts an electrical signal obtained by the image sensor 14. The obtained image data is temporarily placed in a memory, and scaled according to the size of a VRAM (Video Random Access Memory) and displayed on the image display unit 28. This is performed periodically about 24 times, about 30 times to about 60 times per second, thereby realizing a so-called live view. At this time, it takes time to read out the image signal from all the pixels of the image sensor 14, and for example, it is difficult to read out the signal within about 60 times per second, that is, within about 16.7 milliseconds. For this reason, one line is read out every several lines, for example, every three lines, and the reading speed can be increased by thinning out two lines therebetween.

The magnification of the image read from the entire effective pixel of the image sensor 14 is set to 1 and the angle of view is set to 100%. When the user starts the electronic zoom during the live view, the scaling factor of the previous frame is multiplied by r every frame. At this time, the angle of view is the angle of view represented by Expression (1) as compared to the previous frame. R is an arbitrary number larger than 1.
100 ÷ r ^ 2 [%] (1)
For example, in the case of r = 1.01, it is about 98 [%], and if the zooming operation from the wide angle side (low magnification side) to the telephoto side (high magnification side) is performed during live view, it is about 98 with respect to the previous frame. The angle of view of [%] will be displayed in the next frame.
Further, the number of steps from 1 to n times is expressed by equation (2).
Log _r n [step] (2)
That is, when r = 1.01, 1 to 3 times is 110 steps. If the frame rate of the live view is 30 fps, it takes about 3.7 seconds from the start of the electronic zoom.
In the live view, by setting r to a small value, the magnification changes substantially continuously to realize smooth display, but the time for changing from a certain magnification to a certain magnification becomes longer.

On the other hand, if it is desired to shoot a still image actually, if it is designed so that it can be continuously shot, it is difficult to operate the same magnification every time when it is desired to shoot a plurality of times at a certain magnification. For example, even if the user always wants to shoot at a magnification of 2 times, it may be 1.99 times or 2.01 times.
Therefore, the magnification at which a still image can be taken is set discretely rather than continuously. For example, the zoom ratio at which a still image can be taken is r = 1.0105. Since there are about 11 steps from Equation (2), the live view is about 3 times in 110 frames, while still images can be taken at 12 different angles of view from 1 to 3 times.

In this case, still image shooting is not always possible at the angle of view displayed in the live view. When the user performs an electronic zoom stop operation while a live view is being displayed at an angle at which still image shooting is not possible, zooming is performed to an angle at which still image shooting is possible, and zooming is stopped at that angle.
In addition, when the user gives a still image shooting instruction while the live view is displayed with an angle of view that cannot capture still images, zooming to the angle of view that allows still image shooting as in the conventional example, and then shooting is performed. When this is done, the time lag from the user's shooting operation until actual shooting is increased.
Taking Table 1 as an example, the live view is 1.000x, 1.0100x, 1.0201x, etc. for each frame, and the electronic zoom is performed substantially continuously, but still images can be taken at 1.000x, 1.1046x.・ It is discrete. For this reason, if a still image is shot when the live view display is 1.0201 times, it is not possible to shoot at the same angle of view.
Therefore, as described below, still image shooting is performed at an angle of view different from the angle of view displayed in the live view.

The processing operation during live view of the digital camera in the first embodiment will be described below with reference to FIGS. Each processing in FIGS. 2 and 3 is realized, for example, by the system control circuit 50 executing a program and controlling each unit.
When the mode dial switch 60 is changed to the moving image mode or when the start of the live view is instructed by the operation of the operation unit 70, the system control circuit 50 drives the shutter 12 and the mirror 130, and the image sensor 14 Is formed (step S101). For example, when the image sensor 14, the A / D converter 16 and the like are in the power save mode, power is supplied and initial setting or the like is performed (step S102).

Next, the system control circuit 50 determines whether or not an electronic zoom operation is performed by the operation unit 70 (step S103).
If the electronic zoom is being performed, the magnification and the cutout amount are determined by the electronic zoom control unit 66 in consideration of the frame rate of the live view (step S104).
When zooming from the wide-angle side to the telephoto side, as shown in Equation (5), the zoom is enlarged to Z [times] per frame, and when the frame rate is n [fps], after t [seconds], Z _t [Double].
Z _t = Z ^nt (5)
That is, when the magnification Z per frame is 1.0100 times and the frame rate is 30 fps, it reaches 3 times in about 3.7 seconds. When the magnification is expressed for each frame, it is as shown in Table 1 described above.
Conversely, when zooming out from the telephoto side to the wide-angle side, equation (6) is obtained.
Z _t = Z ^{1 / nt} (6)

  Further, it is determined from the magnification calculated in step S104 whether or not the magnification allows still image shooting (step S105). That is, the live view is enlarged (or reduced) by 1.0100 times for each frame as described above. On the other hand, for example, still images are restricted so that they can be taken only at discrete magnifications as described in Table 1. In the example of Table 1, for example, when the enlargement ratio of the live view is 1.0510, it is determined that the still image shooting is not permitted, so it is determined No, and the process proceeds to step S107. On the other hand, when the live view enlargement ratio is 1.1046 times, since it is a magnification that allows still image shooting, it is determined Yes and the process proceeds to step S106.

  If it is determined in step S105 that the still image shooting is permitted, the magnification is temporarily stored in the memory 52 (step S106). Note that the number of zoom steps may be held instead of holding the magnification. The number of zoom steps is, for example, the number of steps that indicates how far the zoom has advanced with the wide-angle end set to 0. In the example of Table 1, the number of zoom steps in live view is 5 if it is 1.1046 times. The number of zoom steps for a still image is 1. Further, not the magnification but the angle of view at which a still image can be captured may be held in units of pixels.

  Next, the system control circuit 50 determines which part of the image formed on the image sensor 14 is to be displayed according to the magnification determined in step S104 (step S107). When the magnification is 1, the entire image formed on the effective pixels of the image sensor 14 is used. When the magnification is 2, the image formed on the image sensor 14 according to the equation (2) is 25%. Is used. In other words, the upper, lower, left, and right quarters are cut off, and the center half is used. Since the area actually used for development is small, the time required for reading from the image sensor 14 can be shortened, the amount of memory 30 used can be reduced, and the continuous shooting speed and the number of continuous shots can be improved. Normally, 25% of the center of the image sensor 14 is used, but the end may be used instead of the center, and the subject detected by the subject detection unit such as the face included in the image processing circuit 20 may be used. It is also possible to dynamically switch the area to be used for tracking.

  Next, the system control circuit 50 calculates an appropriate exposure amount from the image signal obtained by the exposure control unit 48 in order to determine the exposure (step S108). Then, the area used by the image sensor 14 is set for the image sensor 14 via the exposure control unit 40 according to the accumulation time, the sensor sensitivity, and the cutout amount determined in step S107 (step S109). In step S109, a digital gain is set for the image processing circuit 20. At this time, in a case where the magnification is high, that is, when the electronic zoom is on the telephoto side, it is one of preferable modes to control the exposure in accordance with the magnification, for example, by focusing light on the center.

  The system control circuit 50 starts exposure of the image sensor 14, and converts the signal read from the image sensor 14 into a digital signal by the A / D converter 16 (step S110). The obtained image is subjected to development processing for converting to, for example, the YUV format while correcting the peripheral light amount that darkens the peripheral portion due to the lens by the image processing circuit 20 in consideration of the white balance for adjusting the color (step). S111). Then, the image processing circuit 20 performs a so-called trimming process according to the cutout amount determined in step S107, and performs digital scaling according to the resolution of the image display unit 28 (step S112). For example, as described above, when output to an external monitor via HDMI (not shown) as described above, the scaling factor is generally higher than that of the image display unit 28 built in the camera. It may be different. The image generated in this way is displayed on the image display unit 28 (step S113).

Next, the system control circuit 50 determines whether or not the user is operating the shutter switch 64 (step S114). If there is a still image shooting instruction, the process proceeds to step S120, and if there is no still image shooting instruction, the process proceeds to step S115.
If there is no still image shooting instruction in step S114, it is determined whether there is a live view end instruction from the user (step S115). If there is no live view end instruction, the process returns to step S103 to continue the live view operation. On the other hand, if there is a live view end instruction, the process proceeds to step S116, and the image sensor 14, the A / D converter 16 and the like are set in the power save mode. Then, the mirror 130 is lowered and the shutter 12 is closed to prevent the subject image from being combined (step S117).

  On the other hand, if there is a still image shooting instruction in step S114, the system control circuit 50 determines the magnification for still image shooting from the current live view magnification, the still image shooting magnification held in step S106, and the like (step S114). S120). Details of the still image magnification determination process in step S120 will be described later. Subsequent sensor settings (step S121), capture (step S122), and development (step S123) are different from steps S109, S110, and S111, respectively, except that different parameters are used, such as setting for still image shooting. This is the same, and a description thereof is omitted.

Next, the system control circuit 50 performs a so-called trimming process in which the image processing circuit 20 cuts out the center part or the subject part in accordance with the still image shooting magnification determined in step S120, and performs a scaling process as necessary (step S120). S124). In the scaling process, the trimmed image is scaled to a size before trimming or a predetermined number of pixels. Alternatively, when saving the trimmed image size, the scaling process may not be performed.
The trimmed / magnified image is compressed into a general-purpose format such as JPEG (step S125) and stored in the recording medium 200 (step S126).

  Next, the system control circuit 50 scales and displays the image trimmed and scaled in step S124 by the image processing circuit 20 in accordance with the resolution of the image display unit 28 or an external monitor (not shown) (step S127). The quick review display is described sequentially in the flowchart of FIG. 2, but is preferably performed in parallel with the storage processing in step S126.

Here, the still image magnification determination process (step S120) in the first embodiment will be described in detail. FIG. 3 is a flowchart illustrating still image magnification determination processing according to the first embodiment.
When zooming from the wide angle side, in the example of Table 1, the magnification of the live view advances to 1.000 times, 1.0100 times, 1.0201 times,..., 1.0937 times, but at this time, it is held in step S106. The still magnification that can be taken is still 1.000 times. Further, when the zoom operation continues and the live view magnification becomes 1.1046 times, the still image photographing magnification held in step S106 becomes 1.1046 times. If the zoom operation continues further, the magnification of the live view will increase to 1.1157 times and 1.1268 times, but the still image photographing magnification held in step S106 remains 1.1046 times until 1.2202 times.
For example, if the still image shooting operation is performed while the magnification of the live view is as high as 1.1157 times,..., 1.2081 times, 1.1046 times that is the still image shooting magnification held in step S106 is selected (step S106). S301).

Conversely, when zooming out from the telephoto side, the still image shooting held in step S106 is similarly performed while the live view magnification is as low as 1.2202 times, 1.2081 times, 1.1961,... 1.1157 times. The possible magnification remains 1.2202 times. Further, when the zoom-out operation continues and the live view magnification becomes 1.1046 times, the still image photographing magnification held in step S106 becomes 1.1046 times. If the zoom-out operation continues further, the magnification of the live view will decrease to 1.0937 times, 1.0829 times, etc., but the magnification that can be captured in step S106 is 1.1046 times until it becomes 1.000 times It remains.
For example, if the still image shooting operation is performed while the magnification of the live view is as low as 1.0937 times,..., 1.0100 times, 1.1046 times that is the still image shooting magnification held in step S106 is selected (step S106). S301).
With the above processing, still image shooting can be performed at a magnification at which still image shooting can be performed immediately before the still image shooting operation is performed.

(Second Embodiment)
In the second embodiment, the still image magnification determination process (step S120) is different from that of the first embodiment. The configuration of the digital camera in FIG. 1 and the basic processing operation at the time of live view in FIG. 2 are the same as those in the first embodiment, and the description thereof is omitted here.

FIG. 4 is a flowchart showing still image magnification determination processing in the second embodiment.
For example, assume that the still image shooting operation is performed while the live view magnification is as high as 1.1157 times,. First, it is determined whether or not the magnification of the live view is a magnification capable of capturing a still image (step S401). If it is determined in step S401 that the still image shooting is not possible, the process proceeds to step S403, and then a magnification capable of still image shooting is selected. In the case of this example, 1.2202 times next to 1.1046 times which is the magnification capable of taking a still image held in step S106 is selected. That is, a higher magnification than the live view magnification is selected. Note that when the magnification is a still image capturing magnification in step S401, the still image capturing magnification held in step S106 is selected (step S402).
Conversely, when zooming out from the telephoto side, a lower magnification than the magnification of the live view is selected in step S403.
Through the above processing, it is possible to shoot at the angle of view intended by the user without delay from the shooting instruction of the user.

(Third embodiment)
In the third embodiment, the still image magnification determination process (step S120) is different from the first embodiment. The configuration of the digital camera in FIG. 1 and the basic processing operation at the time of live view in FIG. 2 are the same as those in the first embodiment, and the description thereof is omitted here.
In the first embodiment and the second embodiment, there may be a large difference between the angle of view displayed in the live view and the angle of view actually recorded in still image shooting. In particular, when the still image capturing magnification is more discrete, the difference in the angle of view becomes significant.
Therefore, in the third embodiment, shooting is performed at an angle of view capable of shooting a still image close to the live view display. For example, when the magnification of the live view is 1.0201 times, comparing the magnifications of 1.000 times and 1.1046 times that can shoot still images is closer to 1.000 times, so select 1.000 times and shoot. This “viewing angle at which a still image can be taken close to the live view display” may be compared for the magnification difference expressed by Equation (3) or by comparing the logarithm as shown by Equation (4). Also good.
｜ 1.1046−1.0201 ｜ ＞ ｜ 1.000－1.0201 ｜ ・ ・ ・ (3)
｜ log _1.01 (1.1046 ÷ 1.0201) ｜ ＞ ｜ log _1.01 (1.000 ÷ 1.0201) ｜ ・ ・ ・ （4）

FIG. 5 is a flowchart illustrating still image magnification determination processing according to the third embodiment.
For example, it is assumed that a still image shooting operation is performed when the live view magnification is 1.1268. First, it is determined whether or not the magnification of the live view is a magnification capable of capturing a still image (step S501). If it is not a magnification that allows still image shooting in step S501, the process proceeds to step S503, the magnification displayed in the live view, the magnification that can be captured in step S106, and the next still image shooting possible. Compare the magnification and select a magnification that can capture still images close to the live view display. In this example, the live view magnification of 1.1268 times, the still image shooting magnification of 1.1046 times stored in step S106, and the next still image shooting magnification of 1.2202 times are compared. Since the view magnification is close to 1.1268 times, this 1.2202 times is selected. If it is determined that the still image can be captured in step S501, the magnification that can be captured in step S106 is selected (step S502).
By the above processing, it is possible to prevent the difference between the angle of view displayed in the live view and the angle of view actually recorded by still image shooting from increasing.

(Fourth embodiment)
In the fourth embodiment, the still image magnification determination process (step S120) is different from that of the first embodiment. The configuration of the digital camera in FIG. 1 and the basic processing operation at the time of live view in FIG. 2 are the same as those in the first embodiment, and the description thereof is omitted here.
If the user performs a still image shooting operation before the angle of view of the live view becomes a field angle at which still image shooting is possible, there is a high possibility that the user wants to take a picture immediately. In such a case, it may be preferable to shoot at a wider angle than the angle of view displayed in live view. This is because even if an unnecessary part is captured, a preferable angle of view can be cut out by image editing. Conversely, if still image shooting is performed on the telephoto side, a large subject or a subject at the end may not be captured.

FIG. 6 is a flowchart showing still image magnification determination processing in the fourth embodiment.
For example, assume that the still image shooting operation is performed while the live view magnification is as high as 1.1157 times,. First, it is determined whether or not the magnification of the live view is a magnification capable of capturing a still image (step S601). If it is determined in step S601 that still image shooting is possible, the still image shooting magnification held in step S106 is selected (step S602).
If the magnification is not such that still image shooting is possible in step S601, the process proceeds to step S603 to determine whether the zooming operation is from the wide-angle side to the telephoto side. If the zooming operation is from the wide-angle side to the telephoto side, the process proceeds to step S602, and the still image shooting magnification held in step S106 is selected. In the case of this example, since the zooming operation is from the wide-angle side to the telephoto side, the process proceeds to step S602, and 1.1046 times, which is the still image shooting magnification held in step S106, is selected. On the other hand, if the zooming operation is from the telephoto side toward the wide-angle side, the process proceeds to step S604, and then the magnification at which the still image can be captured, that is, the one-step wide-angle side from the magnification at which the still image can be captured held in step S106. Select the magnification of.
In other words, when a still image shooting operation is performed at a live view magnification of, for example, 1.1268 times, still image shooting is possible even while zooming from the wide-angle side to the telephoto side and while zooming from the telephoto side to the wide-angle side. The magnification of 1.1046 times.

(Fifth embodiment)
In the fifth embodiment, the still image magnification determination process (step S120) is different from that of the first embodiment. The configuration of the digital camera in FIG. 1 and the basic processing operation at the time of live view in FIG. 2 are the same as those in the first embodiment, and the description thereof is omitted here.
If the user performs a still image shooting operation before the angle of view of the live view becomes a field angle at which still image shooting is possible, there is a high possibility that the user wants to take a picture immediately. In the fourth embodiment, an example is shown in which shooting is performed on the wide angle side with respect to the angle of view displayed in the live view. However, if the user takes a picture quickly, there is a possibility that the subject has suddenly entered the angle of view, and there is a desire to perform continuous photography at high speed. In such a case, it may be preferable to shoot on the telephoto side from the angle of view displayed in the live view. Continuous shooting by reducing the angle of view, shortening the readout time from the image sensor 14, reducing the amount of memory 30 used, shortening the time required for image processing such as development and compression in the image processing circuit 20 This is because it is preferable to increase the speed and the number of continuous shots.

FIG. 7 is a flowchart showing still image magnification determination processing in the fifth embodiment.
For example, assume that the still image shooting operation is performed while the live view magnification is as high as 1.1157 times,. First, it is determined whether or not the live view magnification is a still image shooting magnification (step S701). If it is determined in step S701 that the still image can be captured, the magnification that can be captured in step S106 is selected (step S702).
If the magnification is not such that still image shooting is possible in step S701, the process proceeds to step S703 to determine whether the zooming operation is from the wide-angle side toward the telephoto side. If the zooming operation is from the wide-angle side toward the telephoto side, the process proceeds to step S704, and the magnification at which the still image can be photographed next, that is, the magnification at the one-step telephoto side from the magnification at which still image photographing can be held in step S106. Select. In the case of this example, since the zooming operation is from the wide-angle side to the telephoto side, the process proceeds to step S704, and the next magnification of 1.2202 times the still image shooting magnification held in step S106 is selected. On the other hand, if the zooming operation is from the telephoto side to the wide angle side, the process proceeds to step S702, and the still image shooting magnification held in step S106 is selected.
In other words, when a still image shooting operation is performed at a live view magnification of, for example, 1.1268 times, still image shooting is possible even while zooming from the wide-angle side to the telephoto side and while zooming from the telephoto side to the wide-angle side. The magnification is 1.2202 times.

(Sixth embodiment)
In the sixth embodiment, the still image magnification determination process (step S120) is different from the first embodiment. The configuration of the digital camera in FIG. 1 and the basic processing operation at the time of live view in FIG. 2 are the same as those in the first embodiment, and the description thereof is omitted here.
Shoot at a wider angle than the angle of view displayed in the live view as in the fourth embodiment, or shoot at the telephoto side of the angle of view as displayed in the live view as in the fifth embodiment. It is preferable to switch automatically depending on the shooting scene or the like.

FIG. 8 is a flowchart showing still image magnification determination processing in the fourth embodiment.
First, it is determined whether or not the magnification of the live view is a magnification capable of capturing a still image (step S801). If it is determined that the still image can be captured in step S801, the magnification that can be captured in step S106 is selected (step S802).

  If the magnification is not such that still image shooting is possible in step S801, the process proceeds to step S803, where the subject and the moving body are detected. For example, a subject detection unit such as a face included in the image processing circuit 20 detects the position and size of the subject. Alternatively, the image processing circuit 20 extracts feature points of the image obtained by live view, and detects the position and size of the moving object according to how the feature points move. As a simple method, the position and size of the moving object may be detected by acquiring the difference between the current frame and the past frame of the live view. In this case, since the zooming operation is being performed, the angle of view differs between the past frame and the current frame. For this reason, the means for acquiring the difference performs evaluation with the narrower angle of view of the two frames. Note that the detection of the subject and the moving body is not limited to these methods, and an existing technique is used.

  Next, according to the detection result of step S803, whether to shoot at a wide angle side (wide angle priority mode) or to shoot at a telephoto side (telephoto priority mode) than the angle of view displayed in live view. Determination is made (step S804). Note that steps S806, S802, and S808 in the wide-angle priority mode are the same as steps S603, S602, and S604 described in the fourth embodiment, and a description thereof is omitted here. Further, steps S807, S802, and S808 in the telephoto priority mode are the same as steps S703, S702, and S704 described in the fifth embodiment, and a description thereof is omitted here. Table 2 summarizes the contents of the wide-angle priority mode / telephoto priority mode.

Hereinafter, the determination process of the wide-angle priority mode / telephoto priority mode in step S804 will be described in detail.
If the subject detected in step S803 is moving, the wide-angle priority mode is set to prevent the subject from deviating from the angle of view or taking an extreme edge during still image shooting.
When the subject detected in step S803 is at the end of the live view display angle of view, the wide angle priority mode is set. For the same reason, when the moving object detected in step S803 is at the end of the display angle of view of the live view, the wide angle priority mode is set.

On the other hand, when the subject detected in step S803 is near the center of the live view display angle, the telephoto priority mode is set for the purpose of increasing the continuous shooting speed as described above.
If the subject detected in step S803 is smaller than a predetermined size, the telephoto priority mode is set to enlarge the subject as much as possible.
In a camera equipped with a continuous shooting mode, it is preferable to set the telephoto priority mode regardless of the subject or the moving body. The continuous shooting mode here refers to a dedicated mode that captures a lot of movement such as sports, pets, or children, and HDR (high dynamic range) shooting, etc. Including modes.
Note that the above-described method is an example regarding the determination processing of the wide-angle priority mode / telephoto priority mode, and a person skilled in the art can appropriately select an optimal method.
In this way, it is possible to automate switching between shooting with a wide angle priority or shooting with a telephoto priority.

  In the embodiment described above, the example in which the scaling process is performed after the captured still image is trimmed to the same angle of view as the live view is shown. However, as described above, the trimmed angle of view may be stored as it is. In this case, it is possible to maintain the magnification at which the still image can be captured in step S106 so as to maintain the trimming size.

(Other embodiments)
The present invention can also be realized by executing the following processing. That is, software (program) that realizes the functions of the above-described embodiments is supplied to a system or apparatus via a network or various storage media, and a computer (or CPU, MPU, etc.) of the system or apparatus reads the program. It is a process to be executed.

  14: Image sensor, 20: Image processing circuit, 22: Memory control circuit, 24: Image display memory, 28: Image display unit, 30: Memory, 50: System control circuit, 52: Memory, 56: Non-volatile memory, 66 : Electronic zoom control unit, 100: camera body, 200: recording medium, 300: lens unit

Claims (12)

An imaging apparatus that includes an imaging device that converts a subject image into an image signal, and that performs a live view that periodically displays an image output from the imaging device on a display unit,
Equipped with an angle-of-view determining means for determining an angle of view when taking a still image
The angle-of-view determination unit is configured to change the image output from the image sensor during the live view and continuously change the display angle of view when the still image shooting instruction is given. When still images cannot be shot with the same angle of view as the display angle of view, the angle of view at which the still image can be shot closest to the display angle of view of the live view on the wide angle side, or the view angle of view of the live view on the telephoto side An image pickup apparatus that selects an angle of view capable of shooting a still image.   If the still angle shooting means cannot capture a still image at the same angle as the live view display angle when the still image shooting instruction is given, the still angle closest to the live view display angle is displayed on the wide angle side. A method of selecting a view angle close to the display angle of view of the live view out of a view angle capable of shooting and a view angle closest to the display view angle of the live view on the telephoto side. Item 2. The imaging device according to Item 1.   If the still angle shooting means cannot capture a still image at the same angle as the live view display angle when the still image shooting instruction is given, the still angle closest to the live view display angle is displayed on the wide angle side. The imaging apparatus according to claim 1, wherein a field angle capable of photographing is selected. It further comprises detection means for detecting a subject,
The angle-of-view determining means is when the still image cannot be shot with the same angle of view as the live view display angle when the still image shooting instruction is given, and the subject detected by the detecting means is moving 4. The image pickup apparatus according to claim 3, wherein an angle of view capable of capturing a still image closest to the display angle of view of the live view is selected on the wide angle side. It further comprises detection means for detecting a subject,
The angle-of-view determining unit is configured to capture a still image with the same angle of view as a live view display angle when a still image shooting instruction is given. 4. The image pickup apparatus according to claim 3, wherein when the image is at an end of the display angle of view, an angle of view capable of capturing a still image closest to the display angle of view of the live view is selected on the wide angle side. An acquisition means for acquiring a difference between a past frame and a current frame of the live view;
The angle-of-view determination unit is configured to capture a still image with the same angle of view as a live view display angle when a still image shooting instruction is given. 4. The imaging apparatus according to claim 3, wherein when the image is located at an end of the display angle of view, an angle of view capable of taking a still image closest to the display angle of view of the live view is selected on the wide angle side.   If the still angle shooting means cannot capture a still image at the same angle as the live view display angle when a still image shooting instruction is given, the still image closest to the live view display angle on the telephoto side is displayed. The imaging apparatus according to claim 1, wherein a field angle capable of photographing is selected. It further comprises detection means for detecting a subject,
The angle-of-view determining unit is configured to capture a still image with the same angle of view as a live view display angle when a still image shooting instruction is given. 8. The imaging apparatus according to claim 7, wherein when the image is near the center of the display angle of view, an angle of view capable of capturing a still image closest to the display angle of view of the live view is selected on the telephoto side. It further comprises detection means for detecting a subject,
The angle-of-view determination unit is configured to determine in advance a subject to be detected by the detection unit when a still image cannot be shot with the same angle of view as a live view display angle when a still image shooting instruction is given. 8. The imaging apparatus according to claim 7, wherein if the size is smaller than the size, an angle of view capable of capturing a still image closest to the display angle of view of the live view is selected on the telephoto side.   The angle-of-view determining means is configured to detect a still image at the same angle as the live view display angle when a still image shooting instruction is given. The imaging apparatus according to claim 7, wherein an angle of view capable of capturing a still image closest to a display angle of view of the live view is selected. A control method of an imaging apparatus that includes an imaging device that converts a subject image into an image signal and that performs a live view that periodically displays an image output from the imaging device on a display unit,
The same view angle as the live view display angle when a still image shooting instruction is given while scaling the image output from the image sensor during live view and continuously changing the display view angle. If still image shooting is not possible, the angle of view that is closest to the live view display angle on the wide-angle side, or the image that is closest to the live view display angle of view on the telephoto side is available. A method for controlling an imaging apparatus, comprising a step of selecting a corner. A program for controlling an imaging device that includes an imaging device that converts a subject image into an image signal and that performs a live view that periodically displays an image output from the imaging device on a display unit,
The same view angle as the live view display angle when a still image shooting instruction is given while scaling the image output from the image sensor during live view and continuously changing the display view angle. If still image shooting is not possible, the angle of view that is closest to the live view display angle on the wide-angle side, or the image that is closest to the live view display angle of view on the telephoto side is available. A program for causing a computer to execute processing for selecting a corner.

Images