JP2002218501A - Image pickup device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image pickup device that can display an image suitable for image pickup of stereo pair images onto its finder so as to very easily realize stereoscopic photographing. SOLUTION: A system controller 112 is provided with an EVF display control section 112d that has a function of selecting a usual photographing mode or a stereoscopic photographing mode for image display on an LCD image display system 111 used for an electronic finder (EVF). The EVF display control section 112d uses an object image signal as usual for display on the LCD image display system 111 in a usual photographing mode but uses a monocular image segmented from a trimming area for display on the LCD image display system 111 in a stereoscopic photographing mode.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an imaging device capable of handling a stereoscopic image, and more particularly to an imaging device suitable for capturing a multi-view stereo image.

[0002]

2. Description of the Related Art An image is photographed and recorded including three-dimensional information.
There are a variety of proposals for reproducing and observing this. Among them, the so-called twin-lens stereo system, which records two images with parallax corresponding to the viewpoints of the left and right eyes and presents the two images to the left and right eyes, respectively, is advantageous in that it is simplest in configuration and inexpensive. Because of its large size, it has been used from old days to today.

[0003] In this twin-lens stereo, there are various presentation methods. For example, in the case of simultaneous observation by a large number of people on a large screen, a polarization projection method using polarized glasses or a time-sharing presentation using shutter glasses is used. Although these methods are used, all of them require a large-scale and expensive system, so that they are rarely used except for special business use. Therefore, for so-called personal use, there is a restriction that only one person can observe at the same time, but the method using stereo pair images, which is the most basic and classic method, can observe clear images at very low cost. As a method, it is still widely used today.

[0004] The stereo pair image will be described in detail. An L image corresponding to a left-eye viewpoint image and an R image corresponding to a right-eye viewpoint image are usually arranged in parallel with a slight gap, and are arranged in parallel. Make up one image. The LR image is actually a single standard horizontal position image (horizontal 3: horizontal) due to system limitations of a 35 mm single-lens reflex camera + stereo adapter, which are widely used as the simplest image capturing apparatus for this type of image.
The vertical 2) is vertically divided into two parts, so that each image, that is, the stereoscopic image to be observed, is generally at a vertical position (horizontal-to-vertical ratio of about 3: 4).

[0005] In this specification, the LR of 2
An image in which images are spatially juxtaposed (on the image plane) to form one image is called a stereo pair image. Note that the above specific configuration (numerical values and the like) is merely an example, but for simplicity of description, unless otherwise specified, description will be made on the premise that the above specific example is taken as an example.

This stereo pair image does not require any special system for (1) recording, printing, transmission, printing and the like. (2) If appropriate conditions are satisfied, direct stereoscopic observation is possible. That is, the left and right images can be fused without using any device. It has an extremely excellent feature.

More specifically, in the case of (2), a state in which the LR image is correctly captured by the left and right eyes and recognized as one stereoscopic image instead of two different images is referred to as fusion of the left and right images. In the case of a "parallel arrangement" (L is arranged on the left and R is arranged on the right) printed in a size (specifically, the width is slightly smaller than twice the interpupillary distance = 10 to 13 cm), it is necessary for observation. They can be fused by using the so-called "parallel method" that turns the gaze parallel (although it takes some practice for some people). In addition, "crossing arrangement" in which the left and right images are exchanged is also used, and there is no restriction on the print size, and you can still directly observe stereoscopically by the "crossing method" that crosses the eyes, but eyestrain at the time of observation And the unnaturalness during stereoscopic observation (the miniature garden phenomenon) is somewhat large,
The parallel arrangement is more popular.

In any case, a stereo pair image having two great features that (1) a system can be selected and (2) direct observation is possible, is a so-called media mix, especially in the spread of the Internet and digital cameras. It is expected that its value will be reviewed and used as it progresses.

In view of this, the present applicant first attaches a stereo adapter to a normal single-lens image pickup optical system, and based on a plurality of parallax images obtained thereby, creates an electronic stereo pair image, SPM (Stereo Pear in Multimedia). And generates an electronic image file SGM (Stereo
An imaging device for recording as "Gram in Multimedia" has been proposed (Japanese Patent Application No. 2000-259489).

[0010]

By the way, when an external stereo adapter is added to the image pickup system of a normal monocular camera, even if the optical system of the stereo adapter is ideally set, the LR image is obtained. Troubles such as overlap and vignetting occur. This phenomenon also depends on the aperture value on the camera side. For example, when the F value is small (open side) as shown in FIG. 7A, the overlap of the LR images becomes large, and FIG. When the F-number is large (at the narrowing-down side), a phenomenon occurs in which the dark vignetting region generated between the LR images becomes large. Here, the vignetting region has the same meaning as vignetting in a general optical system, and here means a region where sufficient light does not reach by the stereo adapter. Overlap and vignetting are phenomena that occur not only at the boundary of the LR image but also at the periphery of the image frame depending on the characteristics of the optical system of the stereo adapter.

In the imaging apparatus of the prior application, recording of a high-quality stereo image is realized by performing appropriate area trimming on a captured image signal with respect to problems of image vignetting and overlap. However, even in this case, there still remains a difficult problem in capturing a stereo pair image. This is a problem of composition by the finder.

That is, since the image observed from the finder is input from the photographing optical system, when a stereo adapter is used, the image actually observed from the finder is also an LR image. The images will be observed side by side. For this reason, it is difficult to grasp which of the observed L and R images should be framed, and this is particularly noticeable when the above-mentioned vignetting or overlap occurs.

Further, when a technique for generating a stereo image for recording by trimming is used as in the imaging apparatus of the prior application, the actually extracted image is a partial image cut out by area trimming. On the finder, the position of the trimming, that is, the actual imaging angle of view cannot be confirmed. In particular, in the above-described imaging device, the horizontal position L image is changed by changing the trimming image frame setting as well as the vertical position LR image obtained by vertically dividing the standard horizontal position image into two.
Since an R image can also be generated, it is difficult to confirm which part is actually photographed as a stereo image.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to enable display of an image suitable for capturing a stereo pair image, so that stereoscopic imaging can be realized extremely easily. To provide a simple imaging device.

[0015]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an image pickup optical system, an image pickup device for photoelectrically converting a subject image input via the image pickup optical system, and an image pickup device. An imaging apparatus comprising: an imaging unit that obtains a subject image signal based on an output; and an electronic finder unit that displays the subject image signal. The imaging device performs a stereo photography mode capable of stereoscopic photography and normal monocular photography. A normal shooting mode for use in the normal shooting mode, wherein the subject image signal is used for display on the electronic viewfinder means, and in the stereo shooting mode, predetermined trimming is performed on the subject image signal. Extracting at least one of a plurality of monocular images that are components of one multi-view stereo image from the subject image signal;
The monocular image after the extraction is used for display on the electronic finder means.

According to this imaging apparatus, the viewfinder display is switched between the normal shooting mode and the stereo shooting mode. In the normal shooting mode, the subject image signal is used as it is for display on the electronic viewfinder means as usual.
In the stereo shooting mode, at least one monocular image extracted from the subject image signal by trimming is used for display on the electronic finder means. By using the extracted monocular image obtained by trimming for the viewfinder display, an image without vignetting or overlapped area can be displayed on the viewfinder, and stereoscopic photography can be realized extremely easily. It becomes possible.

In particular, for display on the finder, 1) a single monocular image extracted from the subject image signal is displayed on the electronic finder means, and 2) a plurality of monocular images extracted from the subject image signal are arranged in parallel. 3) Display the plurality of monocular images extracted from the subject image signal on the electronic finder means in a superimposed state so that the respective image frames coincide with each other. , It is preferable to use one of the modes.

In the mode 1), only one of L and R images can be displayed when capturing a stereo pair image.
The composition setting by the viewfinder can be performed in the same manner as in normal shooting, which is extremely effective. In the mode 2), it is possible to shoot an image while confirming an image similar to an actually generated stereo pair image with a viewfinder. Further, in the mode 3), it is possible to shoot while confirming the fusion state of the LR images.

Also, a stereo image frame setting means for setting a plurality of image frames corresponding to a plurality of monocular images which are components of one multi-view stereo image in an image area of the image sensor, Stereo image generating means for generating a structured stereo image according to a predetermined stereo image handling format by using a plurality of monocular images obtained corresponding to a plurality of shooting image frames; In some cases, it is desirable that a monocular image corresponding to the image frame set by the stereo image frame setting means be displayed on the electronic finder means.

Thus, a high-quality stereo image can be generated while avoiding the problem of image vignetting and overlap, and the image frame can be matched between the final stereo image and the image displayed on the viewfinder. Becomes Therefore, it is possible to perform three-dimensional imaging while checking which part is actually captured as a stereo image.

The present invention also provides an image pickup optical system, an image pickup device for photoelectrically converting a subject image formed by the image pickup optical system, and an image pickup means for obtaining a subject image signal based on an output of the image pickup device. A display unit that displays the subject image signal; and performing a predetermined trimming on the subject image signal so that a plurality of constituent elements of one multi-view stereo image are included in an imaging region of the imaging device. A stereo image frame setting unit for setting a plurality of image frames corresponding to a monocular image, and a plurality of monocular images obtained corresponding to the plurality of image frames, according to a predetermined stereo image handling format. And a stereo image generating means for generating a structured stereo image, wherein the display means selectively displays one of the plurality of photographed image frames on the display means. A frame display mode, a structured stereo image display mode in which the plurality of captured image frames are displayed on the display in a state where the plurality of captured image frames are arranged in parallel, or the plurality of captured image frames are overlapped so that the plurality of captured image frames match. The display device may further include a unit that performs display on the display unit by using a superimposed frame display mode that is displayed on the display unit in a state.

Also in this configuration, a high-quality stereo image can be generated by avoiding the problems of image vignetting and overlap, and the image frame can be matched between the final stereo image and the display image. It is possible to extremely easily perform three-dimensional imaging while checking the trimming position.

[0023]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram illustrating a circuit configuration of an electronic camera according to an embodiment of the present invention.

In the figure, reference numeral 101 denotes an imaging lens system including various lenses; 102, a lens driving mechanism for driving the lens system 101; 103, an exposure control mechanism for controlling the aperture and shutter device of the lens system 101; A low-pass and infrared cut filter; 105, a CCD color image sensor for photoelectrically converting a subject image; 106, a CCD driver for driving the image sensor 105;
A pre-processing circuit including a / D converter, etc .; 108, a digital processing circuit for performing color signal generation processing, matrix conversion processing, and other various digital processing; 109, a card interface; 110, a memory card;
Denotes an LCD image display system.

In the figure, reference numeral 112 denotes a system controller (CPU) for comprehensively controlling each unit, 113 denotes an operation switch system composed of various SWs, and 114 denotes an operation display for displaying an operation state, a mode state, and the like. System, 115 is a lens driver for controlling the lens driving mechanism 102, 116 is a strobe as a light emitting means, 117 is an exposure control driver for controlling the exposure control mechanism 103 and the strobe 116, and 118 is various kinds of setting information and the like. 1 shows a non-volatile memory (EEPROM) for performing the operation.

In the electronic camera of this embodiment, the system controller 112 performs overall control, and controls the exposure control mechanism 103 and the CCD driver 106 to drive the CCD image pickup device 105 for exposure (charge accumulation). ) And read out the signal, take it into the digital process circuit 108 via the pre-process circuit 107, perform various signal processing, and record it on the memory card 110 via the card interface 109. .

Although the basic configuration up to this point is the same as that of a conventional general electronic camera, in this embodiment, in addition to this, the operation switch system 113 includes a stereo photography mode capable of stereo photography and a normal photography mode. A mode changeover switch is provided for switching between normal shooting modes for performing monocular shooting. Further, the system controller 112 includes an image frame setting unit 112a for setting a trimming area of an imaging area, an SPM synthesizing unit 112b for synthesizing an SPM image from a monocular image, and generating SGM image data from the SPM image. Generation unit 112 for
c is provided.

Further, in this embodiment, the system controller 112 has an EVF display having a function of switching the image display on the LCD image display system 111 used as an electronic finder (EVF) between a normal shooting mode and a stereo shooting mode. A control unit 112d is provided. This E
In the normal shooting mode, the VF display control unit 112d outputs the subject image signal as it is in the LCD image display system 111 as usual.
In the stereo shooting mode, a monocular image cut out from the trimming area is used for display on the LCD image display system 111. The trimming process is executed by digital arithmetic processing by the digital process circuit 108, and a display image signal obtained by performing the trimming process on the captured image signal in the data buffer 108a is written to the display memory 108b.
It is displayed on the LCD image display system 111.

In the electronic camera of this embodiment, FIG.
As shown in FIG. 1, a mirror type stereo adapter 200 is detachable from the lens barrel of the camera body 100. The adapter 200 is located at a position about a parallax away from the mirror 20.
1 and 202 are arranged, and these mirrors 20
Mirrors 203 and 204 are provided to guide the light reflected by the mirrors 202 to the camera. Adapter 200
Is incident on the area L of the image sensor 105 via the mirror 203 and the photographing lens 101, and the light incident on the mirror 202 for the right eye is reflected by the mirror 204 and the photographing lens 101. An image is formed on a region R of the image sensor 105 via the image sensor 105.

The switching between the normal shooting mode and the stereo shooting mode is performed by the above-described mode changeover switch. However, the mode may be automatically changed according to whether or not the mirror type stereo adapter 200 is attached.

In the stereo shooting mode, by performing a shutter trigger operation with the stereo adapter 200 attached, exposure and signal reading of the CCD image pickup device 105 are performed in the same manner as in the normal shooting mode. As a result, image signals are read from the entire image pickup area of the CCD image pickup device 105. In the stereo shooting mode, the following processing is performed on the image signals.

First, an image frame is set by an image frame setting section 112a included in the system controller 112, and a trimming process for cutting out a monocular image from the image frame is performed in the digital process circuit 108. That is, as shown in FIG. 3, the screen is vertically divided into two, and the left half is assigned to the L image and the right half is assigned to the R image (1).
00% trimming). Although it is possible to use 100% trimming, in the present embodiment, the width is limited to 90% in order to prevent an overlap or vignetting from appearing in an image, and furthermore (although not essential) the height and width balance is adjusted. L and L are trimmed at the same rate
Assign to R image. Although the imaging field angle itself is limited to a small value by such an image frame setting, a relatively good image located near the center with respect to the mirror of the adapter 200 can be extracted and used.

It is to be noted that, for example, by setting the vertical width limiting ratio to be larger than the horizontal width, not only the LR image at the vertical position as shown in FIG. it can.

Next, under the control of the SPM synthesizing unit 112b included in the system controller 112, an SPM image is generated in the digital process circuit 108. That is, the L and R images obtained by the above-described trimming are combined as shown in FIG. 4 to be one image (SPM image) in which two images are arranged in parallel on the left and right without any gap. At this time, 1 to 1 around the boundary area or around the SPM image
It is also a preferable modification to arrange a frame line having a width of several pixels (for example, black where R = G = B = 0) so that the SPM image is visually clear.

The SPM image is stored in an SGM (Stereo Gram in Multime) contained in the system controller 112.
dia) The stereo data is generated by the generation unit 112c into JPEG image data added as a header. That is, it is preferable to compress the image information at the time of recording or transmission. At this time, any method can be used, but the most standard known JPEG compression is used. At this time, for example, stereo data is assigned to a predetermined tag in the user information area of the header section. The information to be recorded is: a: stereo or not (default: Y) b: number of images in stereo (default: 2) c: arrangement of each monocular image (existing area including number of vertical and horizontal pixels) is basic information Becomes

With this information, the apparatus itself or another apparatus can separate and reproduce the original monocular image by reading this information (after expanding the image, each image can be separated according to the number and arrangement information). Just cut it out).
Such an SGM is one file, ie, a handling unit, of all image data of one stereo image and necessary stereo data other than the image data. Therefore, the SGM is an example of a (narrowly defined) structured stereo image. is there. Since it is an inseparable handling unit for general use, for example, for use on a general-purpose PC or transmission on the Internet, there is no problem that only a part of the unit is erroneously recorded, transmitted, or erased.

However, in the present invention, the structured stereo image is intended to be broadly defined. Therefore, other than the above example, the SGM may be configured such that the image data is divided into a plurality of files. That is, it is obvious that effects such as reduction in size and weight and avoidance of troubles when using the adapter can be similarly obtained regardless of the SGM format. In addition,
In order to configure such a multi-file format SGM, the above-described trimming (cutting out each of the L and R images from one captured image frame) is indispensable.

The generated SGM is processed by a digital process circuit 108 which operates according to an instruction from the system controller 112.
The data is recorded on the memory card 110 via the card interface 109 by the recording means in the inside.

The card on which the SGM is recorded is used, for example, by replacing it with a slot of a general-purpose PC or the like. The camera body further has an input / output port, and can input / output the generated SGM through a wired or wireless connection.
In addition, SG via card (card interface)
It is also possible to input and output M.

Prior to such a main image pickup operation, a CCD image pickup device 10 is required to obtain a moving image signal for EVF display.
5, the image signal is continuously read. In the stereo shooting mode, the image signal is displayed on the LCD image display system 111 after being subjected to the same trimming processing as described above and, if necessary, SPM synthesis processing under the control of the EVF display control unit 112d. Done. EVF
The trimming process and the SPM synthesizing process performed for display are the same as the trimming process and the SPM synthesizing process performed at the time of main imaging except for a difference in resolution of an image to be handled, and the image frame setting unit 112a and the SPM synthesizing unit, respectively. 112b.

The EVF display has the following four display modes. 1) Non-stereo display mode in which the image signal of the entire imaging area is used as it is 2) Single frame display mode in which only one of the trimmed L or R monocular images is displayed as one image 3) Trimmed L and R SPM display mode for displaying the SPM obtained by arranging left and right monocular images side by side and combining them 4) Overlapping frame mode for displaying the trimmed L and R monocular images superimposed on each other Display mode ”is used. In the stereo shooting mode,“ Single frame display mode ”,“ SPM display mode ”,“ Overlapped frame mode ”
Can be selectively used. Display images displayed in each of these display modes are shown in FIGS.

FIG. 5 shows an example of a display image when an image frame corresponding to a vertical LR image is set, and FIG. 6 shows a case where an image frame corresponding to a horizontal LR image is set. 3 shows an example of a display image.

FIGS. 5A and 6A show the case where the “non-stereo display mode” is used. The image before the trimming process is performed, that is, the vignetting (or overlapping area) obtained by the stereo adapter 200. L)
The entire R image is displayed as a finder image.

FIGS. 5B and 6B show the case where the “single frame display mode” is used, and one monocular image (here, an L image) cut out by trimming.
Only the finder image is displayed, and the vignetting area and the overlap area are not displayed. In this display mode, an image similar to that of normal single-lens imaging can be displayed while stereo imaging using the stereo adapter 200, so that composition setting by the finder can be performed in the same manner as in the normal imaging mode. Moreover, what is displayed is the image after the vignetting area and the overlapping area have been removed by trimming, and the observed angle of view becomes equal to each monocular image actually generated and recorded as SGM. The composition can be determined very easily while watching.

Which of L and R images to display can be switched by a switch operation or the like. In this case, as shown in the drawing, it is desirable to display on the screen together identification information such as characters and marks indicating whether the currently displayed image is an L image or an R image. In addition, EVF
At the time of display, only one of L and R used for display needs to be trimmed.

FIGS. 5C and 6C show the case where the "SPM display mode" is used, and LR images arranged side by side with no gap on the left and right by SPM synthesis are displayed as finder images. Also in this case, the vignetting area and the overlap area are not displayed. Final S obtained by actual imaging
It is possible to perform stereoscopic imaging while checking the MP image in advance.

FIGS. 5D and 6D show the case where the “overlapping frame display mode” is used, and the two images are superimposed so that the respective picture frames of the LR images cut out by trimming match. The screen is displayed in the state. This display image can be obtained, for example, by calculating an average value of the L image and the R image for each pixel. (Because an image obtained as an average value of two images is equivalent to a double-exposure image photographed with a single exposure amount of 標準 of the standard.) Default EVF in the stereo photography mode
For example, the display mode is set to “single frame display mode”, and “SP
By being configured to be switchable between the “M display mode” and the “superimposed frame display mode”, framing can be adjusted from various angles according to the situation.

As described above, according to the present embodiment, a plurality of monocular image frames are set on the imaging area of one image sensor 105, and a stereo image is obtained from a plurality of monocular images obtained from this. Problems such as overlap and vignetting specific to the adapter method can be avoided. In particular, trimming using the monocular frame
Since it is also used for VF display, it is possible to set the composition without overlapping or vignetting, and to confirm the trimming position of the finally generated SPM image. .

The present invention is not limited to the above embodiment. In the above embodiment, the SPM
Although SGM and SGM are examples of still images, the present invention is not limited to this, and can be applied to SPMs and SGMs using moving images in the same way as is clear from the description of signal processing in EVF display. That is, the method of the SPM synthesis, S
Regarding the stereo data added when generating GM,
Since only the elements that are not dependent on the still image and moving image are included, the conventional moving image capturing technology is used as it is, and for example, MPEG, which is one of the typical moving image compression formats, is used in place of the above-described JPEG. And the effect can be obtained.

Although the stereo adapter used in this embodiment is a mirror type adapter combining a plane mirror, any type of adapter can be used instead. For example, the direction of the visual field (line of sight) of the camera can be changed. Use of a prism type stereo adapter in which wedge-shaped prisms to be deflected are arranged on the left and right with facing each other is also a preferable example.

In the present embodiment, two image frames are set in the image pickup area. In order to obtain a stereoscopic image, three or more stereo adapters and three or more image frame settings corresponding thereto may be used. Further, not only when a finder image is displayed, but also when a normal L
By setting the monocular image frame for the R image, the above-described “single frame display mode”, “SPM display mode”,
It is also possible to reproduce and display the image on the LCD image display system 111 in any of the “overlap frame mode”.

The above-described embodiment includes various stages of the invention, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some components are deleted from all the components shown in the embodiment, the problem described in the column of the problem to be solved by the invention can be solved, and the effects described in the column of the effect of the invention can be solved. When at least one of the above is obtained, a configuration from which this configuration requirement is deleted can be extracted as an invention.

[0053]

As described above, according to the present invention,
An image suitable for capturing a stereo pair image can be displayed on a finder, and framing of an actually generated stereo image can be confirmed.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an electronic camera according to an embodiment of the present invention.

FIG. 2 is an exemplary view showing a configuration of a mirror type stereo adapter mounted on the electronic camera of the embodiment.

FIG. 3 is a view showing an image frame set in an imaging area in the embodiment.

FIG. 4 is a diagram showing an embodiment in which L and R images are combined to form an SP.
The figure which shows a mode that an M image is generated and SGM is further generated.

FIG. 5 is an exemplary view for explaining an EVF display mode in the embodiment.

FIG. 6 is an exemplary view for explaining an EVF display mode in the embodiment.

FIG. 7 is a diagram showing an overlap and vignetting peculiar to the adapter method, which is a conventional problem.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 camera body 101 lens system 102 lens driving mechanism 103 exposure control mechanism 104 filter system 105 CCD color imaging device 106 CCD driver 107 preprocessing unit 108 digital processing unit 109 card interface 110 memory card 111: LCD image display system 112: System controller (CPU) 112a: Image frame setting unit 112b: SPM synthesis unit 112c: SGM generation unit 112d: EVF display control unit 200: Mirror type stereo adapter 201 to 204: Mirror

Claims (7)

[Claims] An image pickup optical system, an image pickup device for photoelectrically converting a subject image input through the image pickup optical system, and image pickup means for obtaining a subject image signal based on an output of the image pickup device.
An image pickup apparatus comprising electronic finder means for displaying the subject image signal, comprising: a stereo photographing mode capable of stereoscopic photographing and a normal photographing mode for performing normal monocular photographing, wherein the normal photographing mode In the mode, the subject image signal is used for display on the electronic finder means, and in the stereo shooting mode,
By performing predetermined trimming on the subject image signal, at least one of a plurality of monocular images that are components of one multi-view stereo image is extracted from the subject image signal, and the monocular image after the extraction is extracted. An image pickup apparatus is configured to be used for displaying on the electronic finder means. 2. The image pickup apparatus according to claim 1, wherein in the stereo shooting mode, a single monocular image extracted from the subject image signal is displayed on the electronic finder means. . 3. In the stereo shooting mode, a plurality of monocular images extracted from the subject image signal are displayed on the electronic finder in a state of being arranged in parallel. An imaging device according to any one of the preceding claims. 4. In the stereo shooting mode, the plurality of monocular images after extraction are superimposed on the electronic finder means so as to coincide with respective image frames of the plurality of monocular images extracted from the subject image signal. The imaging device according to claim 1, wherein the imaging device is configured to display the image. 5. A stereo image frame setting means for setting a plurality of image frames corresponding to a plurality of monocular images, which are components of one multi-view stereo image, in an image area of the image sensor. Stereo image generating means for generating a structured stereo image according to a predetermined stereo image handling format by using a plurality of monocular images obtained corresponding to the plurality of image frames; 5. The electronic camera according to claim 1, wherein in the mode, a monocular image corresponding to the image frame set by the stereo image frame setting unit is displayed on the electronic finder unit. 2. The imaging device according to claim 1. 6. An imaging optical system, an imaging device for photoelectrically converting a subject image formed by the imaging optical system, imaging means for obtaining a subject image signal based on an output of the imaging device, and the subject image signal Display means for displaying a plurality of monocular images, which are components of one multi-view stereo image, in the imaging region of the imaging device by performing predetermined trimming on the subject image signal. Stereo imaging frame setting means for setting a plurality of captured image frames, and a structured stereo according to a predetermined stereo image handling format using a plurality of monocular images obtained corresponding to the plurality of imaging frames. An image pickup apparatus comprising: a stereo image generating means for generating an image; a single frame display mode for selectively using one of the plurality of photographed image frames to display the image on the display means. In a structured stereo image display mode in which the plurality of captured image frames are displayed on the display in a state where the plurality of captured image frames are arranged in parallel, or in a state in which the plurality of captured image frames are overlapped so that the plurality of captured image frames match. An imaging apparatus comprising: means for performing display on the display means using a superimposed frame display mode for displaying on the display means. 7. The stereoscopic image generated by the stereo image generating means, wherein the plurality of monocular images are L and R images that are components of a binocular stereo image.
The image pickup apparatus according to claim 6, wherein the image pickup apparatus corresponds to a stereo pair image in which the L and R images are arranged on the left and right.