JPH089221A - Method and device for image pickup - Google Patents

Abstract

PURPOSE:To provide the method and the device for image pickup which output a proper picture by executing the electronic zoom function, the electronic close-up function, etc., by a photographer and following the exposure control and the focus control in the middle of this execution. CONSTITUTION:The image pickup device is provided with a lens 1, an image pickup element 2, an enlargement processing circuit 5, an enlargement position input device 21, an enlargement position display circuit 22, a focus control circuit 46, an exposure control circuit 45, a microcomputer 9, etc. When the video signal from the image pickup element 2 is subjected to enlargement processing in accordance with enlargement position information and enlargement rate information inputted from the enlargement position input device 21, the focus of the lens 1 is controlled in accordance with an enlargement frame by the focus control circuit 46, and the exposure of the image pickup element 2 is controlled by the exposure control circuit 45. Consequently, a proper picture is obtained in the middle of enlargement operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image pickup apparatus and an image pickup method such as a video camera having a magnification change processing function for electronically changing the magnification of an image pickup screen.

[0002]

2. Description of the Related Art Conventionally, in an image pickup apparatus capable of digitally processing an image signal, a so-called electronic zoom function for electronically zooming up a subject such as an optical zoom, or a part of an image obtained from an image pickup element is previously stored. There has been proposed an electronic image magnification enlarging means such as an electronic close-up function for instantaneously enlarging to a set magnification (for example, 2 times or 3 times).

Hereinafter, such a conventional electronic image magnification enlarging means will be described with reference to FIG. FIG. 8 is a block diagram showing a configuration of a video camera for explaining a conventional electronic image magnification enlarging means. In FIG. 8, 1 is a lens for forming a subject image (not shown), and 2 is incident from the lens 1. An image sensor for converting the converted optical signal into an electric signal (photoelectric conversion), 3
Is an analog-digital converter that converts an analog signal photoelectrically converted by the image sensor 2 into a digital signal (hereinafter,
A / D converter) 4 denotes a predetermined process for the signal A / D converted by the A / D converter 3, for example, dividing into a color signal and a luminance signal, and for each signal. A first camera signal processing circuit that performs γ processing and the like, 5 is an enlargement processing circuit that enlarges the video signal output from the first camera signal processing circuit 4, and 6 is an image signal output from the enlargement processing circuit 5. On the other hand, a second camera signal processing circuit for performing a predetermined process, for example, a synchronization signal addition process, and a digital-analog converter 7 for converting a digital signal output from the second camera signal processing circuit 6 into an analog signal ( Below, D / A
8 is an enlarging process execution switch for the photographer to input an execution command signal for enlarging the image signal by the enlarging process circuit 5, and 9 is a microcomputer for controlling the entire video camera (hereinafter, referred to as "converter"). It is described as a microcomputer).

Reference numeral 21 is an enlarged position input device for inputting a position to be enlarged by the photographer, and 22 is an enlarged position input device 21.
The enlargement position display circuit for displaying the position information input from the reference numeral 23 is for the photographer to monitor the video signal output from the D / A converter 7 and the planned enlargement position display signal from the enlargement position display circuit 22. An electronic viewfinder (hereinafter referred to as EVF) 30 is an enlargement magnification setting device capable of setting an enlargement magnification.

In the thus constructed video camera, light from a subject is imaged on the image sensor 2 through the lens 1 and a diaphragm mechanism (not shown), converted into an electric signal and output. The output electric signal is input to the A / D converter 3 through a circuit (not shown) such as correlated double sampling (CDS) and converted into a digital signal. The converted digital signal is input to the first camera signal processing circuit 4 and subjected to predetermined processing, and then input to the second camera signal processing circuit 6 as it is, or the enlargement processing circuit 5
Is input to the second camera signal processing circuit 6 and enlarged. Then, the signal subjected to the predetermined processing in the second camera signal processing circuit 6 is D / A
After being input to the converter 7 and converted into an analog signal, it is output to a VTR (video tape recorder) or the like (not shown).

The enlargement processing by the enlargement processing circuit 5 is executed by the photographer operating the enlargement processing execution switch 8 to input an enlargement processing execution command signal and the microcomputer 9 receiving the input signal.

FIG. 9 is a block diagram showing an example of the configuration of the enlargement processing circuit 5. In FIG. 9, 10 is a memory circuit, which is a video signal input from the first camera signal processing circuit 4 (see FIG. 8). Of the scanning line “n” line which is stored in the memory and is designated by the memory read control signal and the signal of the scanning line “n−1” line delayed by 1H. A memory control signal generation circuit 11 generates a memory control signal for controlling writing and reading of data with respect to the memory circuit 10.
Reference numeral 12 denotes an enlargement ratio determination circuit, which determines the enlargement ratio and the enlargement position during the enlargement processing by the enlargement processing circuit 5. An interpolation coefficient generation circuit 13 generates an interpolation coefficient according to the enlargement ratio determined by the enlargement ratio determination circuit 12. A first multiplier 14 multiplies the scanning line “n” line signal output from the memory circuit 10 by the interpolation coefficient output from the interpolation coefficient generation circuit 13. A second multiplier 15 multiplies the signal of the scanning line "n-1" line output from the memory circuit 10 by the interpolation coefficient output from the interpolation coefficient generation circuit 13. 1
An adder 6 adds the output signal of the first multiplier 14 and the output signal of the second multiplier 15. Reference numeral 17 denotes a microcomputer interface circuit, which receives the enlargement ratio and enlargement position information output from the microcomputer 9 (see FIG. 8).

From the memory circuit 10 in which the input video signal is stored, the signal of the scanning line "n" line and the scanning line "n-1" line are generated by the memory control signal generated from the memory control signal generating circuit 11. Signal and are read out. At the same time, the interpolation coefficient generating circuit 13 outputs an interpolation signal and an interpolation coefficient corresponding to the distance between the scanning line “n” line and the scanning line “n−1” line. Then, in the first and second multipliers 14 and 15, after multiplying the interpolation coefficient by the signal of the scanning line “n” line and the signal of the scanning line “n−1” line, the respective multiplication values are added by the adder. By adding by 16, a linear addition signal is obtained.

FIG. 10 shows a display example of the screen (EVF screen) of the EVF 23 when the enlargement execution position is input using the enlargement position input device 21 and the enlargement ratio is input using the enlargement ratio setting device 30. It is a figure. In the figure, 12 is E
On the VF screen, the original images 27 and 28 and the planned expansion angle-of-view frame 29 are displayed.

The photographer confirms the view angle frame to be enlarged by the enlargement planned signal from the enlargement position display circuit 22 shown in the EVF 23 and operates the enlargement position input device 21 and the enlargement magnification setting device 30 to obtain a desired position. After confirming that there is an enlargement frame, the enlargement execution switch 8 executes enlargement.

FIG. 11 is a flow chart showing the control operation of the microcomputer 9 for executing the actual enlargement function in response to such an operation by the photographer.

First, when the power is turned on in step S401 of FIG. 11, the microcomputer 9 starts operating. Then, after the initial value data of the predetermined enlargement position is stored in the enlargement position memory and the enlargement ratio memory in the microcomputer 9 respectively in step S402, the process proceeds to step S403 and waits for a predetermined time. When the predetermined waiting time has elapsed, step S
In step 404, it is determined whether or not a signal for executing the enlargement process is input from the enlargement process execution switch 8. If it is input, the process proceeds to step S405, and if not, step S4.
Go to 07 respectively.

In step S405, the above-mentioned step S4 is performed.
In 02, the enlargement position information and the enlargement ratio information respectively stored in the enlargement position memory and the enlargement ratio memory are sent to the enlargement processing circuit 5. Then, the process proceeds to step S406 and E
After the images for which the enlarging process is being executed are continuously displayed on the VF screen 12 in terms of time, the process returns to step S403. A display example of the EVF screen 12 at the time of this output is shown in FIG. Figure 1
2 (a) shows the initial enlarged state, and (b) shows the original images 27, 28.
Shows the expanded state, and (c) shows the expanded end state.

On the other hand, in step S407, enlargement position data and enlargement ratio data are created based on the signals input from the enlargement position input device 20 and the enlargement ratio setting device 21, and are stored in the enlargement position memory and the enlargement ratio memory, respectively. Store. Next, the process proceeds to step S 408 to create a planned enlargement angle-of-view frame signal based on the enlargement position data and enlargement ratio data stored in the enlargement position memory and enlargement ratio memory, and sends the signal to the enlargement position display circuit 22. As shown in FIG. 10, the planned enlarged view angle frame 27 is displayed on the EVF screen 24.
After that, the process returns to step S403.

By performing the linear interpolation processing as described above, an enlarged video signal can be obtained.

[0016]

However, in the above-mentioned conventional example, since the exposure control and the focus control do not follow the enlargement frame, the exposure level and focus position of the image after the enlargement operation is not appropriate. Occasionally, a strange image was produced in some cases.

The present invention has been made in view of the above-mentioned problems of the above-mentioned prior art, and an object of the present invention is to execute an electronic zoom function, an electronic close-up function, or the like, and during execution thereof. It is an object of the present invention to provide an image pickup apparatus and an image pickup method capable of following an exposure control and a focus control and outputting an appropriate image.

[0018]

In order to achieve the above object, an image pickup device according to claim 1 of the present invention forms a focus through a focus adjusting means for adjusting the focus of the lens and the lens with the adjusted focus. An image pickup device that outputs a video signal of the generated subject image, a magnification change information input unit that inputs magnification change information, and a magnification change process of the output video signal based on the input magnification change information. An image pickup apparatus equipped with a video signal processing means and a monitoring means for displaying the video signal subjected to the magnification changing processing is provided with a focus control means for controlling the adjusted focus together with the magnification changing processing.

An image pickup device according to a second aspect of the present invention is an image pickup device for outputting a video signal of a formed subject image, an exposure amount adjusting means for adjusting the exposure amount of the subject image, and a magnification for inputting magnification change information. An image pickup apparatus comprising: a change information input unit, a video signal processing unit that performs a magnification change process based on the input magnification change information, and a monitoring unit that displays the video signal that has undergone the magnification change process. An exposure amount control means for controlling the exposure amount is provided in addition to the magnification changing process.

According to a third aspect of the present invention, in the image pickup apparatus according to the first or second aspect, the video signal processing means selects an execution position of the magnification change processing, and an execution position selection means, and the selection. And an interpolating means for interpolating the video signal by using the determined interpolating coefficient.

According to a fourth aspect of the present invention, in the image pickup apparatus according to the third aspect, the execution position selecting means is a gazing point position detecting means for detecting a gazing point position of the photographer at the time of photographing.

In the image pickup method according to the fifth aspect, the focus of the lens is adjusted, the image signal of the object image formed through the lens with the adjusted focus is output from the image pickup device, and the magnification change information is input. Performing magnification change processing of the output video signal based on the input magnification change information,
When the video signal subjected to the magnification changing process is displayed, the adjusted focus is controlled together with the magnification changing process.

[0023]

In the image pickup apparatus according to the first aspect of the present invention, the focus of the lens is adjusted by the focus adjusting means, and the image signal of the object image formed through the lens whose focus is adjusted by the image pickup element is output. Magnification change information is input by the magnification change information input means, the video signal processing means performs magnification change processing of the output video signal based on the input magnification change information, and the monitoring means performs the magnification change processing. When displaying the generated video signal, the focus control means controls the adjusted focus together with the magnification changing process.

In the image pickup apparatus according to the second aspect, the image signal of the subject image formed by the image pickup device is output, the exposure amount of the subject image is adjusted by the exposure amount adjusting means, and the magnification is changed by the magnification change information inputting means. When the change information is input, the magnification change processing is performed by the video signal processing means based on the input magnification change information, and the magnification change processing is performed when the video signal subjected to the magnification change processing by the monitoring means is displayed. In addition, the exposure amount control means controls the exposure amount.

In the image pickup apparatus according to the third aspect, the execution position selecting means included in the video signal processing means selects the execution position of the magnification changing processing, and the interpolation coefficient determining means determines the interpolation coefficient according to the selection. Is determined, and the video signal is interpolated by the interpolation means using the determined interpolation coefficient.

In the image pickup apparatus according to the fourth aspect, the gazing point position of the photographer at the time of photographing is detected by the gazing point position detecting means as the execution position selecting means.

[0027]

Embodiments of the present invention will be described below with reference to FIGS.

(First Embodiment) First, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a block diagram showing the configuration of an image pickup apparatus according to the first embodiment of the present invention. In FIG. 1, the same parts as those in FIG. 8 of the conventional example described above are denoted by the same reference numerals. The difference between FIG. 1 and FIG. 8 is as follows.

Reference numeral 45 is an exposure control circuit for controlling exposure, and 46
Is a focus control circuit for controlling the focus, 47 is an exposure detection circuit for detecting the exposure level after the enlargement processing, and 48 is a focus detection circuit for detecting the focus after the enlargement processing.

The subject image input to the image pickup system circuit through the lens 1 is converted into a digital signal by the A / D converter 3, passes through the first camera signal processing circuit 4, and is then enlarged by the enlargement processing circuit 5.
It will be expanded with. The enlarged image signal passes through the second camera signal processing circuit 6, one of which is converted into an analog signal by the D / A converter and is output to the video output and the EVF 23. On the other hand, the exposure detection circuit 47 and the focus detection circuit 48 detect the exposure level and the focus state after enlargement, respectively, and the detection results are input to the microcomputer 9.

In the microcomputer 9, the exposure level is controlled by the exposure control circuit 45 and the focus state is controlled by the focus control circuit 46 according to the exposure level and the focus condition of the image signal after enlargement. Further, based on the information from the enlargement position input device 21 and the enlargement magnification setting device 30 set by the photographer, the microcomputer 9
Determines the enlarged view angle frame of the input image, and the enlargement processing circuit 5 performs enlargement processing.

FIG. 2 is a flow chart showing the operation of the microcomputer in the image pickup apparatus of the first embodiment.
When the power is turned on in step S101, the microcomputer 9 starts operating. Then, after the initial value data of the predetermined enlargement position is stored in the enlargement position memory and the enlargement ratio memory in the microcomputer 9 in step S102, the process proceeds to step S103 and waits for a predetermined time. When the predetermined waiting time has elapsed, it is determined in step S104 whether or not a signal for executing the enlargement process has been input from the enlargement process execution switch 8. If it is input, the process proceeds to step S105, and if not, to step S107, respectively. move on.

In step S105, step S102
In the enlargement processing circuit 5, the enlargement position information and the enlargement ratio information stored in the enlargement position memory and the enlargement ratio memory, respectively.
Send to Next, the process proceeds to step S106, and the images for which the enlargement process is being performed are output and displayed on the EVF screen 12 continuously in time. In step S109, the exposure control data is sent to the exposure control circuit 45 based on the level detected by the exposure detection circuit 47. In step 110, it is sent to the focus control circuit 46 based on the focus situation detected by the focus detection circuit 48.

On the other hand, in step S107, the enlargement position data and the enlargement magnification data are created based on the signals input from the enlargement position input device 21 and the enlargement ratio setting device 30, and are stored in the enlargement position memory and the enlargement magnification memory. .
In step S108, a planned enlargement angle-of-view frame is created based on the data in the enlargement position memory and the enlargement magnification memory, and is sent to the enlargement position display circuit 22 to display the enlargement planned view angle in the EVF 23 (see FIG. 10).

As described above, according to the image pickup apparatus of this embodiment, the exposure control and the focus control follow the enlargement frame, so that an appropriate image can be obtained during the enlargement operation.

(Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIGS. In this embodiment, as the magnified position input device 21 in the first embodiment described above, the photographer detects the gazing point position when observing the EVF 23 at the time of photographing, and uses the detection signal as magnified position input information. It is the one. In the present embodiment, the parallel light velocity from the light source is projected onto the anterior segment of the eyeball of the observer (photographer), and the corneal reflection image due to the reflected light from the cornea and the imaging position of the pupil are used to measure the gazing point axis. Are seeking.

An example of the gazing point position detecting method will be described below with reference to FIGS. 4 and 5.

FIG. 4 is a conceptual diagram showing an optical system of the gazing point position detecting device T for detecting the gazing point position. In FIG.
Is a half mirror, 33 is a light projecting lens, 34 is a light receiving lens, and 35 is a light source such as a light emitting diode.
Irradiates infrared light which is located in the focal plane of and is blind to the observer. 36 is a photoelectric element array, 37 is a gazing point position processing circuit, 38 is an observer's eyeball, 39 is a cornea, and 40 is an iris.

FIG. 5 is a diagram showing the intensity of the output signal from the photoelectric element array 36. In FIG. 4, the infrared light emitted from the light source 35 becomes parallel light by the light projecting lens 33, is reflected by the half mirror 32, and illuminates the cornea 39 of the eyeball 38. At this time, the corneal reflection image due to a part of the infrared light reflected on the surface of the cornea 39 is transferred through the half mirror 32 and the light receiving lens 34 to the positions Za ′ and Zb ′ on the photoelectric element array 36 and the end portions of the iris 40. The images of a and b are formed. Light receiving lens 34
When the rotation angle θ of the optical axis a of the eyeball 38 with respect to the optical axis a is small, and the Z coordinates of the ends a and b of the iris 40 are Za and Zb, the coordinate Zc of the center c of the iris 40 is expressed by the following equation ( It is represented by 1).

Zc = (Za + Zb) / 2 (1) Further, the Z coordinate of the generation position d of the cornea reflection image is Zd, and the cornea 3
The distance from the center of curvature o of 9 to the center c of the iris 40 is oc
Then, the rotation angle θ of the optical axis a of the eyeball 38 is given by the following (2)
Almost satisfied the formula.

Oc × sin θ = Zc−Zd (2) Here, the Z coordinate Zd of the generation position d of the corneal reflection image and the cornea 3
The Z coordinate Z of the center of curvature o of 9 coincides with each other.
Therefore, in the gazing point position processing circuit 37, by detecting the position of each singular point (corneal reflection image and ends a, b of the iris 40) projected on the photoelectric element array 36 as shown in FIG. The rotation angle θ of the optical axis a of the eyeball 38 can be obtained. At this time, the equation (1) is rewritten as the following equation (3).

Β × oc × sin θ = (Za′−Zb ′) / 2−Zd ′ (3) where β is the distance L 1 between the Z coordinate Zd of the corneal reflection image generation position d and the light receiving lens 34. Is a magnification determined by the distance L0 between the light receiving lens 34 and the photoelectric element array 36, and is usually a substantially constant value.

Next, the detecting operation of the gazing point position detecting device T will be described with reference to FIGS. 6 and 7. 6 is a flowchart showing the gazing point position detecting operation, and FIG. 7 is a photoelectric element array 36.
It is a figure which shows the upper cornea reflection image. In FIG. 7, 40,
Za ', Zb' and Zd 'are as described above, and c'
Is the center of the pupil, Yb 'and Ya' are the upper and lower end coordinates on the pupil circle, and Yd 'is the Y coordinate of the corneal reflection image.

In step S701 of FIG. 6, the coordinates Zd 'of the corneal reflection image in FIG. 7 are detected. Next in step S70
2, the coordinates Zb ', Za' of the boundary point between the iris 40 and the pupil,
Yb 'and Ya' are detected. Next, in step S703, the pupil center c'is calculated based on the data detected in step S702. Next, step S
In step 704, the rotation angle θ of the optical axis a of the eyeball 38 is calculated based on the data calculated in step S703. Here, two types of rotation angles θ in the Z-X plane (horizontal direction) and in the XY plane (vertical direction) are respectively calculated.
Next, in step S705, the gazing point position is calculated based on the value of the rotation angle θ calculated in step S704.

FIG. 3 is a block diagram showing the arrangement of an image pickup apparatus in which the above-mentioned gazing point position detection apparatus T is applied to an enlarged position input apparatus. In FIG. 3, the same parts as those in FIG. 1 of the above-described first embodiment are shown. Are denoted by the same reference numerals. Figure 3
1 is different from FIG. 1 in the configuration of the enlarged position input device. That is, in the enlarged position input device 21 'of this embodiment, an eyepiece 41 and a second half mirror 42 for projecting infrared light are added to the configuration of the optical system of the gazing point position detecting device T shown in FIG. This is a gaze point position detecting device T '.
Incidentally, reference numeral 12 in FIG. 3 is an EVF screen. The other configuration of the enlarged position input device 21 'of the present embodiment is the same as the configuration of the optical system of the gazing point position detection device T shown in FIG. 4, and therefore the same parts are designated by the same reference numerals and their description is omitted. To do.

In FIG. 3, the infrared light projected from the light source 35 passes through the projection lens 33, is reflected by the second half mirror 42 and the first half mirror 32, and reaches the eyeball 38. Then, the reflected light from the eyeball 38 is reflected by the first half mirror 32 and reaches the photoelectric element array 36 via the light receiving lens 34. On the other hand, the captured image displayed on the EVF screen 12 reaches the eyeball 38 via the first half mirror 32 and the eyepiece lens 41. Thus, while the photographer is checking the image on the EVF screen 12, the position of the point of gaze is detected. Gazing point position processing circuit 3
Reference numeral 7 calculates an output signal from the photoelectric element array 36 by using the above-mentioned gazing point position detecting method, and sends it to the microcomputer 9 as an enlarged position input signal desired by the photographer. This microcomputer 9
However, by controlling in the same manner as in the first embodiment described above,
The image position on the screen desired by the photographer can be enlarged. In addition, in FIG. 3, E is an optical axis.

[0047]

As described in detail above, the first aspect of the present invention
According to the image pickup device of the present invention, the focus of the lens is adjusted by the focus adjusting means, the image signal of the subject image formed through the lens of which the focus is adjusted by the image pickup element is output, and the magnification change information inputting means is used. Changing information is input, and based on the input magnification changing information, the video signal processing means performs magnification changing processing of the output video signal,
When the video signal subjected to the magnification changing process by the monitoring unit is displayed, the focus control unit controls the adjusted focus together with the magnification changing process, so that the focus is adjusted even during the magnification changing process. It can be controlled and an appropriate image can be obtained.

According to the image pickup device of the second aspect,
The image signal of the subject image formed by the image pickup device is output, the exposure amount of the subject image is adjusted by the exposure amount adjusting means, the magnification change information is input by the magnification change information input means, and the input magnification change is performed. Based on the information, when the video signal processing unit performs the magnification changing process and the video signal subjected to the magnification changing process by the monitoring unit is displayed, the exposure amount control unit performs the exposure amount together with the magnification changing process. Is controlled, exposure can be controlled even during execution of the magnification changing process, and an appropriate image can be obtained.

Further, according to the image pickup device of the third aspect, the execution position of the magnification change process is selected by the execution position selection means provided in the video signal processing means.
The interpolation coefficient is determined by the interpolation coefficient determining means according to the selection, and the video signal is interpolated using the interpolation coefficient determined by the interpolation means. Change processing can be executed.

According to the image pickup device of the fourth aspect,
Since the gazing point position of the photographer at the time of shooting is detected by the gazing point position detecting means as the execution position selecting means,
The operator can set the execution position of the magnification changing process while looking at the screen, the simple operation does not require any other troublesome operation, the degree of freedom in photographing is improved, and the operability becomes extremely good.

Further, according to the image pickup method of the fifth aspect, the focus of the lens is adjusted, and the image signal of the object image formed through the lens having the adjusted focus is output from the image pickup device to obtain the magnification change information. Is input, and based on the input magnification change information, the magnification change processing of the output video signal is performed, and when the video signal subjected to the magnification change processing is displayed, the magnification change processing is also performed. Since the adjusted focus is controlled, the focus can be controlled even during execution of the magnification changing process, and an appropriate image can be obtained.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an image pickup apparatus according to a first embodiment of the present invention.

FIG. 2 is a flowchart showing an operation of a microcomputer in the image pickup apparatus according to the first embodiment.

FIG. 3 is a block diagram showing a configuration of an image pickup device in which a gazing point position detection device T is applied to an enlarged position input device.

FIG. 4 is a conceptual diagram showing an optical system of a gazing point position detecting device T for detecting a gazing point position.

FIG. 5 is a diagram showing the intensity of an output signal from the photoelectric element array 36.

FIG. 6 is a flowchart showing a gazing point position detection operation.

FIG. 7 is a diagram showing a corneal reflection image on the photoelectric element array.

FIG. 8 is a block diagram showing a configuration of a video camera for explaining a conventional electronic image magnification enlarging means.

FIG. 9 is a block diagram showing an example of a configuration of an enlargement processing circuit 5.

FIG. 10 is an explanatory diagram showing a display example of an EVF screen 12.

FIG. 11 is a flowchart showing a control operation of the microcomputer 9 for executing an actual enlargement function in response to a photographer's operation.

FIG. 12 is an explanatory diagram showing a display example of an EVF screen 12.

[Explanation of Codes] 2 Image sensor 5 Enlargement processing circuit 8 Enlargement processing execution switch 9 Microcomputer 21 Enlargement position input device 30 Enlargement ratio setting device 23 EVF 45 Exposure control circuit 46 Focus control circuit 47 Exposure detection circuit 48 Focus detection circuit T Attention point Position detection device T'Gaze point position detection device

Claims (5)

[Claims] 1. A focus adjusting means for adjusting a focus of a lens, an image pickup device for outputting a video signal of a subject image formed through the lens of which the focus is adjusted, and a magnification change information input for inputting magnification change information. Means, a video signal processing means for performing a magnification changing process of the output video signal based on the inputted magnification changing information, and a monitoring means for displaying the video signal subjected to the magnification changing process. An image pickup apparatus, comprising: a focus control unit that controls the adjusted focus, in addition to the magnification changing process. 2. An image sensor for outputting a video signal of a formed subject image, an exposure amount adjusting means for adjusting an exposure amount of the subject image, a magnification change information input means for inputting magnification change information, An image pickup apparatus comprising: a video signal processing unit that performs a magnification changing process based on input magnification changing information; and a monitoring unit that displays the video signal that has undergone the magnification changing process. An image pickup apparatus comprising an exposure amount control means for controlling the exposure amount. 3. The video signal processing means, an execution position selecting means for selecting an execution position of the magnification changing processing, an interpolation coefficient determining means for determining an interpolation coefficient according to the selection, and the determined. The image pickup apparatus according to claim 1 or 2, further comprising an interpolating unit that interpolates the video signal using an interpolation coefficient. 4. The image pickup apparatus according to claim 3, wherein the execution position selecting means is a gazing point position detecting means for detecting a gazing point position of the photographer at the time of photographing. 5. A focus of a lens is adjusted, a video signal of a subject image formed through the lens of which the focus is adjusted is output by an image sensor, magnification change information is input, and the input magnification change information is input. On the basis of the above, the magnification change processing of the output video signal is performed, and when the video signal subjected to the magnification change processing is displayed, the adjusted focus is controlled in accordance with the magnification change processing. A characteristic imaging method.