JPH04343583A - Reader for imaging device in camera - Google Patents

Abstract

PURPOSE:To connect the output of a register in a certain direction to the reset terminals of individual imaging device to read out each block by the simple constitution in an imaging device of reader for a camera. CONSTITUTION:A reading block is specified by an X specification register 12b for specifying the X-direction of a picture element 12a for executing photoelectric conversion and a Y specification register 12c for specifying the Y- direction of the picture element 12a. The Y-direction adding signal of a block is read out by a reading circuit A 12d and the X-direction adding signal of the block is read out by a reading circuit B 12e. Either one of the registers 12b, 12c is used also as a reset register of the picture element 12a, which controls respective reset terminals and selectively specifies an individual picture element.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a readout device for an image pickup device of a camera, and more particularly to a readout device for a camera image pickup device that reads out a specific area from the image pickup device.

0002

2. Description of the Related Art In a sensor such as an image sensor in which image pickup elements are arranged two-dimensionally, a certain area may be extracted and used. For example, in autofocus (AF), moving object tracking can be considered as a system that measures distances at a plurality of specific areas within the same screen.

Various systems have been proposed for tracking moving objects based on video signals. For example, JP-A-2-1046
No. 37 discloses a system that projects a video signal in the vertical and horizontal directions to track a moving object and detects a focused point based on the differential value of the tracking signal. The outline is shown in FIG. 21. Here, for simplicity, a point light source will be used.

In the figure, XSUM indicates a signal projected in the vertical direction, and YSUM indicates a signal projected in the horizontal direction. It is configured to easily output XSUM and YSUM using a MOS sensor. In FIGS. 21(a) and 21(b), the movement of the image during focus is detected using XSUM and YSUM. Moreover, FIG. 21(c) shows a slightly blurred state. The differential values of XSUM and YSUM are shown in Figure 21(a).
and the differential values of XSUM and YSUM in (b). Then, the in-focus point is detected based on the magnitude of these differential values.

[0005] Furthermore, when reading out video signals when tracking a moving object, it is desirable to be able to extract signals from only the block where the tracked object exists, so specify any block in the MOS sensor and convert the output of that block to Direction and Y
There is a method of adding current in the direction and reading it out.

[0006] Furthermore, there have been some systems in which the video signal is once converted into a digital value and the addition is performed by digital signal processing.

[0007]

[Problems to be Solved by the Invention] However, when tracking a moving object and detecting a focused point using the same sensor, even when using a non-destructive sensor, when performing additive reading in both the X and Y directions in block units, A designation circuit for designating blocks in both the X and Y directions, a readout circuit, and a reset circuit are required, which poses a problem in that the sensor peripheral circuit becomes large-scale.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a readout device for an image sensor of a camera that can read out data in blocks with a simple configuration. .

[0009]

[Means for Solving the Problems] That is, the present invention provides an imaging device comprising a photographing optical system, a group of photoelectric conversion elements that convert the light distribution of a subject image through the photographing optical system into a photoelectric signal, and In a camera imaging device readout device comprising readout means for selectively reading out the photoelectric signal from a part of the area of the element group, the readout means is arranged at a readout position in one direction of the photoelectric conversion element group. and a second designation register that designates a readout position in the other direction of the photoelectric conversion element group,
Either the designated register or the second designated register is connected to a reset terminal for resetting each photoelectric conversion element of the photoelectric conversion element group, and each photoelectric conversion element is selectively reset by controlling each reset terminal. It is characterized by specifying.

0010

[Operation] The camera image sensor readout device of the present invention has a multi-source configuration with two types of pixel output terminals, horizontal and vertical, and outputs for each pixel and addition in the horizontal or vertical direction. Output can be selectively output. In order to read out a specific area of the above pixel, one of the specified horizontal and vertical registers is connected to a reset terminal that resets each pixel of the above pixel, and the specific area is selected by controlling each reset terminal. specified.

[0011]

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows the concept of the present invention, and is a block diagram of a moving object tracking device to which a camera image sensor reading device is applied. This moving object tracking device includes a photographing optical system 11, a photoelectric conversion element 12, a signal processing circuit 13,
Drive circuit 14, tracking circuit 15, and focused point detection circuit 16
, an area designation circuit 17 and a display circuit 18.

The light distribution of the luminous flux guided from the subject by the photographing optical system 11 is converted into the distribution of electrical signals by the photoelectric conversion element 12. Pixel signals and projection signals from the photoelectric conversion element 12 are processed by a signal processing circuit 13.

The drive circuit 14 outputs information of the photographing optical system 11 to the focus detection circuit 16.
The photographing optical system 11 is driven based on the drive signal from the optical system 6. The tracking circuit 15 detects the position of the moving object based on the projection signal from the photoelectric conversion element 12 and outputs a specific area designation signal to the focused point detection circuit 16 and the display circuit 18.

Further, the in-focus point detection circuit 16 uses a signal from the signal processing circuit 13 and information on the photographing optical system 11 obtained via the drive circuit 14 (MTF characteristics, position, aperture, focal length, etc.). , outputs a drive signal to the drive circuit 14,
A focused point of the photographing optical system 11 is detected. Furthermore, based on the specific area designation signal from the area designation circuit 17 or the tracking circuit 15, the signal of the specific area of the photoelectric conversion element 12 is read out, and in addition, the specific area, focus signal, etc. are displayed on the display circuit 18.

The area designation circuit 17 externally sets the moving object position and focus area, and the display circuit 18 determines the specific area from the area designation circuit 17, the tracking circuit 15, and the focusing point detection circuit 16. It displays a signal.

FIG. 2 is a diagram showing the structure of the photoelectric conversion element 12. In the figure, the photoelectric conversion element includes a pixel 12a that performs photoelectric conversion, an X designation register 12b that designates the X direction of the pixel 12a, a Y designation register 12c that designates the Y direction of the pixel 12a, and a readout circuit A12d. and,
It is constituted by a readout circuit B12e.

During tracking operation, X designation register 1
2b, the read block is designated by the Y designation register 12c. Then, the readout circuit A12d reads out the addition signal in the Y direction of the block, and the readout circuit B12e
The addition signal in the X direction of the block is read out. During normal operation, the X specification register 12b and the Y specification register 12c
The pixel to be read out is designated by the , and the pixel is read out by the readout circuit A12d. Tracking operations can be performed simultaneously on only designated blocks, making it possible to increase speed.

In addition, the X designation register 12b or Y
By using either one of the designation registers 12c as a reset register for resetting the signal of the pixel 12a, it is possible to reduce the circuit scale.

[0020] In the following explanation, in-focus point detection is
This is carried out using the method disclosed in "Automatic focus adjustment of television cameras using hill-climbing servo method (hereinafter abbreviated as "mountain-climbing method")" published by Ishida et al. in NHK Technical Journal, Vol. 17, No. 1.

In the above-described configuration, the photoelectric conversion element 12 is a photoelectric conversion element AMI (Amplified MOS Intel
ligent imager: Described in Television Society Technical Report ED1005/IPD113-20. ). Figure 3 shows the basic configuration of AMI 1 pixel.
Its basic characteristics are shown in Figure 4.

The basic configuration of this AMI, as shown in FIG. 3, includes a photodiode PD that performs photoelectric conversion, a reset transistor RT that fixes the photodiode PD to a reset potential VR by a reset signal RS, and a photodiode PD. , and a multi-source transistor RDT that reads out the output of the amplifier transistor AT to output terminals XO and YO in response to a read signal RDS.

FIG. 5 shows the overall structure of the photoelectric conversion element 12. In the same figure, a photoelectric conversion element 12
is a pixel group 121 having a photoelectric conversion unit, each pixel of these pixel group 121 is denoted by Pij, an R register 122 that controls a reset signal RSj of Pij, a V register 123 that controls a readout signal RDSi of Pij, P
One output XOj of ij is read and the output circuit 128
H readout circuit 124 and H readout circuit 1
24, a V readout circuit 126 that reads out the other output YOj of Pij and transfers it to the output circuit 128, a VA register 127 that drives the V readout circuit 126, and an H readout circuit 124 and V readout It is composed of an output circuit 128 that outputs a signal from the circuit 126 to the outside of the AMI. The above R register 122
is the i-th signal in the vertical direction of the pixel group 121.
The V register 203 controls the j-th horizontal row of the pixel group 121 at one time using the j-th signal.

In FIG. 5, the relationship between XOj, YOi, and Pij of each pixel Pij is expressed as shown in FIG. The YOj signal configures each pixel as a common line in the j-th horizontal direction, and the XOi signal configures each pixel as a common line in the i-th vertical direction.

FIG. 7 shows the H readout circuit 124 and V readout circuit 126 of FIG. 5. H readout circuit 124,
The V readout circuit 126 has the same configuration, and uses the SA signal to switch between additive readout during moving object tracking (Mode 2 to be described later) and individual readout of pixels in normal operation (Mode 1 to be described later). (PYO) or PAXO (
The signal of the pixel group 121 is sent to the H register 125 (PAYO).
The switching transistors STi (STj) and STAi (STAj) are controlled and read out using the signal from the VA register 127).

[0026] Mode 1 and mode 2 will now be explained. Mode 1: Read out one pixel at a time. By specifying the V line with the V register 123, scanning in the H direction with the H register 125 and H readout circuit 124, reading the signal from one output terminal XOj of the pixel Pij, and then sequentially shifting in the V direction. Read out pixel signals. Mode 2: Performs addition reading within the specified block. A block is designated by the V register 123 and the R register 122, the V direction addition signal is sent to the H register 125 and the H readout circuit 124, and the H direction addition signal is sent to the VA register 127 and the V readout circuit 126, and the PAXO and PAYO terminals Read from.

Furthermore, in FIG. 4, the output circuit 128 is a PXO
, PAXO, PYO, and PAYO are configured with current-voltage conversion operational amplifiers. PAXO, P.A.
Since YO is an addition output, the amplification factor of the operational amplifier is low, and P
The XO and PYO outputs and final range are set to be the same. In addition, H register 125, VA register 12
7 is a shift register for transferring pulses, and if the method described in Japanese Patent Application No. 2-164561 is used,
It is even more effective.

By the way, the shift register (register 12
5. The basic cell of the VA register 127) is composed of two switches and two inverters, as shown in FIG. 8(a). As shown in FIG. 8(b), CK1
, CK2 is a signal that controls the switch, C is a control signal,
The size of the designated block is determined according to the input method of C. Furthermore, when transmitting a minimum unit signal using C, it can be used as a normal read shift register. Furthermore, if you want to keep the block specified, press CK
1. This can be achieved by fixing CK2.

The in-focus point detection circuit 16 includes the signal processing circuit 13
A/D conversion is performed on the signals, digital values within the focus area are added, and while driving the drive circuit 14, the peak position of the added value, that is, the in-focus position of the photographing optical system 11 is detected. BPF switching is performed by changing the aperture, focal length, and
This is done using optical information such as MTF characteristics and the position of the photographing optical system. The focus area or tracking area is set using a joystick or the method disclosed in Japanese Patent Application No. 2-235074.

The tracking circuit 15 is a PAXO shown in FIG.
, A/D converts the signals corresponding to PAYO, detects the position of the tracked object on the screen using the method shown in FIG. 21, and outputs the position information to the display circuit 18 and the in-focus point detection circuit 16. . The display circuit 18 displays information in the finder based on the tracking area and focus area information from the tracking circuit 15 and the area designation circuit 17. Furthermore, the focused point detection circuit 16
The in-focus state is displayed using the in-focus state signal from.

An example of the display of this display circuit 18 is shown in FIG. Inside the finder 181, there are an LED 182 that indicates focus, front focus, and back focus, and a focus area or tracking area 183. Focus area or tracking area 1
As for 83 and 184, the position 183 is the initialization position, and the position 184 is during the tracking operation or when the focus area is set at an arbitrary position.At that time, the display 183 disappears and only the display 184 remains.

A method of displaying the focus areas or tracking areas 183 and 184 in FIG. 9 is shown in FIG. Display information is guided to the pupil by a finder optical system 186 using a scattering liquid crystal 185 near the primary or secondary imaging plane. The scattering type liquid crystal 185 displays the focus area or tracking areas 183 and 184 in color based on a control signal.

Next, referring to FIG. 11, the operations from setting the focus area to turning on the second (2nd) release will be explained.

When MAIN1 is started, the data memory is initialized (step A1). Thereafter, it is determined whether the first (1st) release is turned on (step A2). This step A
If the 1st release is off at step 2, a change in focus area is confirmed (step A3). In this step A3, if there is no change in the focus area, the process returns to step A2 without changing the focus area. In this case, the initial position of the focus area is the center of the screen.

If the focus area is changed in step A3, that is, if a change signal is received from the area specifying circuit 17 or the tracking circuit 15, the focus area is reset, the viewfinder display is also changed, At the time of change, notify by sound (step A4), and stitch 2
Return to

[0036] Also, in step A2 above, the 1st
If the release is on, it is determined whether the second release is on (step A5). If the 2nd release is off in step A5, the in-focus point detection subroutine CAF is performed (step A6).
. Next, a moving object tracking subroutine MOT is performed (step A7), and further, an interruption determination (1NT1=1) in the moving object tracking subroutine MOT is performed (step A8). In this step A8, if INT1=1, the process returns to step A2. Furthermore, if INT1=0, the process returns to step A5.

In step A5, if the second release is on, a flag MM (MM=1), which is a measure of the focus state based on the addition signal, is determined (step A9). Then, in step A9, if MM=1 (out of focus due to the addition signal), the in-focus point detection subroutine CAF is performed again (step A10). Further, if MM=0 in step A9, the process returns to the main without going through step A10.

Next, the operation of the focused point detection CAF will be explained with reference to the flowchart of FIG.

When subroutine CAF is started,
First, the BP of the signal processing circuit 13 is determined based on the information of the photographing optical system 11.
F is determined, and the sensor and data storage memory are initialized (step B1). Pixels within the focus area are read out from the PXO terminal (step B2
). At the time of reading, the sensor integration is reset and started at the same time.

Next, the outputs of the BPF are digitally added and stored in the data memory M0 (step B3).
. Then, the photographing optical system 11 is driven (step B4).
, similar pixel readout is performed (step B5). Thereafter, the output is stored in the data memory M1 in a similar process (step B6).

Next, the direction in which the focal point of the photographing optical system 11 is located is determined by comparing M0 and M1 (step B7).
. In this step B7, if M0<M1, the driving of the photographing optical system 11 in step B5 is opposite to the direction in which the in-focus point is located, so the flag S indicating the driving direction is set to S=1 (step B8 ).

On the other hand, in step B7 above, M0<
If M1, the photographing optical system 11 is driven by the flag S (step B9), the same pixel readout as above is performed (step B10), and the output is stored in the data memory M2 by the same process ( Step B11). Next, it is determined at M1 and M2 whether or not the mountain has been crossed (step B12).

In this step B12, if M1<M2, the front and rear pins are displayed in the finder (step B13), and after the signal in the data memory M2 is transferred to the data memory M1 (step B14). ), step B9
Return to On the other hand, in step B12, if M1<M2, it is determined that the in-focus point has been exceeded, and the photographic optical system 1
1 is driven to the in-focus point (step B15). and,
The focus is displayed in the viewfinder (step B16).
), exit from this subroutine.

[0044] Here, pixel readout will be described.

FIG. 13 shows i from the screen to V direction 0 to n.
An example is shown in which signals are read from areas kh to j and 0 to m in the H direction. The pixel readout operation will be described with reference to the flowchart in FIG.

First, when the pixel readout subroutine is started, a readout area is set (step C
1). Here, is=i, ie=j, hs=k, he
= h is set respectively. Next, V register 12
Only is above 3 is turned on (step C2). Then, only hs is turned on in the H readout circuit 124, and the pixel signal (hs, is) is read out (step C3).

Here, it is determined whether hs=he (step C4). If hs=he is not found in this step C4, hs=hs+1 is set (step C5), and the process returns to step C3. On the other hand, in step C4 above, hs=he
If so, then is=ie is determined (step C6).

In step C6, if is=ie, hs=k and is=is+1 are set (step C7), and the process returns to step C2. On the other hand, in step C6 i
If s=ie, exit from this subroutine.

FIG. 15 shows a flowchart of moving object tracking. In the figure, when the subroutine MOT is started, the BP is
F is determined, and the sensor and memory are initialized (step D1). Next, a tracking interruption signal (2nd
A determination is made as to whether there is an interruption (release on or 1st release off) (step D2). In this step D2, if there is no interruption, the signal in the tracking area P, which is larger than the focus area and tracking area displayed in the finder in FIG. 9, is added to the PAX shown in FIG. 7.
Output signals corresponding to O and PAYO are sequentially read out in the H and V directions, and the sensor integration is reset and started (step D3).

BP of the signal read out in step D3
The F outputs are added and stored in the data memory M11 (step D4), and then subroutine TUIBI is executed (step D5). And the state detection flag S
A determination of S is made (step D6), and here SS=0(
1st time), SS=1 and the data of M11 becomes M1.
After being stored as 0 (step D7), the process returns to step D2.

On the other hand, in step D6 above, SS=1(
If it is not the first time), the absolute value of the difference between M11 and M10 is compared with a predetermined amount ε (step D9). Then, in this step D9, if the absolute value of the difference between M11 and M10 is larger than the predetermined amount ε, MM=1 is set (step D10), and then the process returns to the main process.

Further, in step D2, if an interruption due to a tracking interruption signal occurs, INT1 is set to 1 (step D8) and the process returns to the main process.

Next, referring to FIG. 16, subroutine T
The operation of UIBI will be explained. Subroutine TUI
When BI is started, flag SS is determined (step E1). In this step E1, if SS=0, the following addition data is stored in the memory. That is, the H data is stored in H2(i) and the V data is stored in V2(i) as digital values (step D2). On the other hand, step E1
If SS=1, the addition data, that is, H data is stored in H1(i) and V data is stored in V1(i) as digital values in the memory (step E6).

When the added data is stored in the memory in step E2, the correlation between V1(i) and V2(I) is taken as the correlation between H1(i) and H2(i), and the amount of deviation is detected. (Step E3). Based on this amount of deviation, information on the new focus area and tracking area is output (
Step E4). Then, the memory data is replaced, that is, H1(i) becomes H2(i), V1(i) becomes V2(i)
) (step E5). Then return to main.

FIG. 17 shows how correlation detection is performed in the flowchart of FIG. 16. In the same figure (a),
The states of H1(i) and H2(i) are shown. Here, H1(
The deviation δl between the images of i) and H2(i) is determined by fixing H1(i) and shifting H2(i), Ss = Σ|H1(i)-H2(i-s)|. This state is shown in FIG. 17(b). The amount of deviation when the value of Ss is the smallest is detected.

FIG. 18 shows the process in which MM=1 or MM=0 in the flowchart of FIG. 15.

When tracking a moving object, the object moves little by little in the optical axis direction with time, and the photographing optical system 11 is fixed. Figure (a) shows the H direction (
The addition output of PAXO) is shown in the same figure (b) in the V direction (PAXO).
O) shows the addition output. As time passes, the subject moves in the H direction,
It moves as δl×1, δl×2, and in the V direction, δly1, δ
Move to ly2.

FIG. 19 shows the relationship between movement in the optical axis direction and specific band frequency components. Movement in the optical axis direction and H
Frequency components in a specific band are extracted and added from the addition data in the direction and the addition data in the V direction. The vertical axis represents the frequency component, and the horizontal axis represents the movement of the object in the optical direction. When moving from t=t1 to t=t2, if there is a large blur, when in focus (t
When the difference between the frequency component at the time of blurring (t=t0) and the frequency component at the time of blurring (t=t2) becomes larger than a predetermined value ε), the flag MM=0 changes to MM=1. Further, the predetermined value ε is information on the photographing optical system 11 (aperture, focal length, MTF characteristics, etc.)
Varies depending on For example, the predetermined value ε has a larger value when the focal length is stopped than when the focal length is not stopped, and the predetermined value ε has a larger value when the focal length is long than when the focal length is short. FIG. 20 shows the area designation state of the sensor when tracking a moving object.

Now, suppose that the subject has moved to the lower right from FIG. The tracking area P is an area necessary for tracking, and the focus area is an area necessary for detecting a focused point, and is an area where the tracking subject is captured.

In the figure, A indicates the signal of the R register 122. In a low level (L) state region, the sensor pixel is in a reset state, and in a high level (H) state region, the sensor pixel is activated. . Similarly, B in the figure indicates a signal of the V register 123, in which pixels of the sensor are in a non-selected state in an L-state region, and pixels of the sensor are in a selected state in an H-state region. In the figure, C indicates a signal from the H register 125, in which the pixels of the sensor are in a non-selected state in an L state region, and a pulse signal is outputted to read out sequentially in an H region. In the figure, D indicates the VA register 127, in which pixels of the sensor are in a non-selected state in an L state area, and signals to be sequentially read out are output in an H area. As the moving object moves, that is, when it moves from the position shown in FIG. 20(a) to FIG. 20(b), each register A, B, C, and D also
Move as shown in FIG.

According to the same embodiment, tracking and
Since focused point detection is performed, a signal without parallax can be obtained, and it is also advantageous in terms of cost and implementation. Furthermore, when tracking a moving object, the state of the in-focus point is monitored using a tracking signal, and the in-focus point is detected again when the monitor level falls below a predetermined value. It becomes possible to provide a focus detection device.

[0062] In the above-described embodiment, the sensor is equipped with an AMI
A non-destructive and randomly accessible sensor, for example, SIT (Static Induction T)
A transistor type solid-state image sensor or the like may be used as the CMD source configuration.

Furthermore, although the switching between moving object tracking and focused point detection is performed by extracting a specific frequency band from the tracking signal and adding it, H and V may be evaluated separately.

Further, although the H and V added signals during tracking of a moving object are read out in time series, H and V may be read out in parallel in two series.

[0065] Furthermore, by changing the integration times for tracking operation and focal point detection and non-destructively reading out the respective signals, both operations may be performed in one integration.

In addition, although the in-focus point detection method has been described as a contrast method, other methods may be used as long as they use video signals.

Furthermore, in the above embodiment, moving object tracking was described, but the invention is not limited to this, and it is possible to extract a specific area from a sensor in which image sensors are arranged two-dimensionally. If so, that's fine.

[0068]

As described above, according to the present invention, it is possible to provide a reading device for an image pickup element of a camera that can read out blocks with a simple configuration even when reading out blocks.

[Brief explanation of the drawing]

FIG. 1 is a block diagram illustrating the concept of the present invention, illustrating the concept of a moving object tracking device to which a reading device for an image sensor of a camera is applied.

FIG. 2 is a diagram showing the configuration of the photoelectric conversion element 12 in FIG. 1.

3 is a circuit diagram showing the basic configuration of the photoelectric conversion element AMI in FIG. 1. FIG.

4 is a diagram showing basic characteristics of the photoelectric conversion element AMI in FIG. 1. FIG.

5 is a diagram showing the overall configuration of the photoelectric conversion element of FIG. 1. FIG.

[Figure 6] XOj and YOi of each pixel Pij in Figure 5
It is a figure showing the relationship between and Pij.

7 is a schematic circuit configuration diagram showing an H readout circuit 124 and a V readout circuit 126 in FIG. 5. FIG.

FIG. 8(a) shows the shift register (register 12) in FIG.
5, a diagram showing the configuration of a basic cell of the VA register 127), and (b) is a timing chart of each control signal in (a) of the same figure.

9 is a diagram showing a display example of the display circuit of FIG. 1. FIG.

10 is a diagram showing the display state of focus areas or tracking areas 183 and 184 in FIG. 9. FIG.

FIG. 11 is a flowchart illustrating the operation from setting the focus area to turning on the second release.

FIG. 12 is a flowchart illustrating the operation of focused point detection CAF.

FIG. 13 is a diagram showing an example in which signals are read from areas i to j from 0 to n in the V direction and kh from 0 to m in the H direction from the screen.

FIG. 14 is a flowchart illustrating a pixel read operation.

FIG. 15 is a flowchart illustrating the operation of tracking a moving object.

FIG. 16 is a flowchart illustrating a tracking operation.

FIG. 17 shows the state of correlation detection in the flowchart of FIG. 16, where (a) shows H1(i), H2(i)
(b) is a diagram showing the relationship between the image shift δl of H1(i) and H2(i) and Ss.

[FIG. 18] In the flowchart of FIG. 15, MM=1
Or, it shows the process of becoming MM=0, where (a) is H
FIG. 3B is a diagram showing the direction (PAXO), and (b) is a diagram showing the V direction (PAYO).

FIG. 19 is a diagram showing the relationship between movement in the optical axis direction and specific band frequency components.

FIG. 20 is a diagram showing a sensor area designation state when tracking a moving object.

[Figure 21] (a) and (b) show the movement of the image during focusing using XS
A diagram showing an example of detection using UM and YSUM, and (c) a diagram showing an example of detecting a slightly blurred image.

[Explanation of symbols]

11...Photographing optical system, 12...Photoelectric conversion element, 12a...Pixel, 12b...X designation register, 12c...Y designation register,
12d...Readout circuit A, 12e...Readout circuit B, 1
3... Signal processing circuit, 14... Drive circuit, 15... Tracking circuit,
16... Focused point detection circuit, 17... Area specification circuit, 18...
Display circuit, 121... Pixel group, 122... R register, 12
3...V register, 124...H read circuit, 125...H
Register, 126...V readout circuit, 127...VA register, 128...output circuit.

Claims (1)

[Claims] Claim 1: A photographic optical system, an image sensor comprising a group of photoelectric conversion elements that converts the light distribution of a subject image through the photographic optical system into a photoelectric signal, and a part of the area of the group of photoelectric conversion elements. In the camera image pickup device readout device, the readout device includes a readout means for reading out the photoelectric signal from the photoelectric conversion element group; , a second designation register for designating a readout position in the other direction of the photoelectric conversion element group, and either the first designation register or the second designation register is used for each photoelectric conversion element group. 1. A readout device for an image sensor of a camera, characterized in that it is connected to a reset terminal for resetting a conversion element, and selectively specifies an individual photoelectric conversion element by controlling each reset terminal.