JP2003179803A - Still picture imaging device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a still picture imaging device capable of capturing a picture without missing a shutter opportunity. <P>SOLUTION: The still picture imaging device is provided with an imaging means 4, an image processing means 5, an image output means 19; a shutter button 25 formed to be depressed either in two-steps of shallow and deep depression, and a control means 8 that applies rough adjustment to the imaging means 4 to produce a first image signal, detects the image signal produced by the imaging means 4 and controls the imaging means 4 for its adjustment in response to an imaging environment to produce a second image signal when the shutter button 25 is shallowly depressed, and records the second image signal when shutter button 25 is further deeply depressed. The control means 8 records the first image signal when shutter button 25 is deeply depressed within a prescribed time, then adjusts the imaging means 4 in response to the imaging environment as its control, produces the second image signal, and records the second image signal. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a still image pickup device, and more particularly to a still image pickup device having various camera control functions such as an autofocus function and a brightness adjusting mechanism.

[0002]

2. Description of the Related Art Conventionally, there are digital cameras equipped with an autofocus function, a brightness adjusting function, and the like. This digital camera includes an image pickup unit such as a CCD element and a white balance correction or γ correction for a video signal generated by the image pickup unit.
A signal processing unit that performs correction, an image processing unit that compresses an image that has undergone predetermined signal processing into a file such as JPEG, a memory that records the image-processed video signal, and an IC card into which an IC card is inserted. Slot and LCD (Liquid c
An electronic viewfinder such as a crystal display) and a control unit for controlling the operation of the entire camera.

Some digital cameras are equipped with a shutter button that is pressed in two steps of shallow pressing and deep pressing. In this type of digital camera, when the shutter button is pressed shallowly when taking a picture of a subject, the signal processing unit performs camera control such as focusing, aperture, and shutter speed on an image previously drawn from the imaging unit. . afterwards,
The digital camera captures a camera-controlled image by further pressing the shutter button. The captured image data is compressed by the image processing unit and then recorded in the IC card by the control unit.

[0004]

However, in the conventional digital camera, after the shutter button is pressed, camera control such as focusing and brightness adjustment is performed, and an image suitable for the shooting environment is captured and then the image is captured. Move on to capture. Therefore, it takes a considerable amount of time from pressing the shutter button to capturing an image, and the user may miss a shutter chance even when he / she wants to take a picture in a hurry.

That is, the conventional digital camera detects the focus, brightness, etc. of the image drawn from the image pickup unit when the user presses the shutter button all at once in a hurry to photograph the subject. After the camera is controlled by the signal processing unit such as focusing and adjustment of proper exposure by shutter speed and aperture, the captured image is captured. Therefore, this digital camera requires a considerable amount of time for camera control from when the user presses the shutter button to when the user actually captures an image that has been pulled in, when the user wants to shoot a subject. Therefore, even if the user presses the shutter button at the shutter chance, the user may not be able to capture the image at the desired moment. Further, there is a certain limit in reducing the time required for the camera control itself.

Therefore, it is an object of the present invention to provide a still image pickup device capable of capturing an image without missing a photo opportunity.

[0007]

In order to solve the above-mentioned problems, a still image pickup apparatus according to the present invention includes an image pickup means for picking up a subject and an image processing for processing an image signal generated by the image pickup means. Means, an image output means for outputting the image processed by the image processing means, a shutter button formed so as to be capable of being pressed in two steps of shallow pressing and deep pressing, and serving as a trigger for imaging a subject, and the imaging means. By controlling the focus control and coarse adjustment of the exposure correction to generate the first image signal, the shutter button is pressed shallowly to detect the image signal generated by the image pickup means to detect the image. By controlling the means, focus control and exposure correction are adjusted according to the shooting environment to generate a second image signal, and the shutter button is pressed deeply to cause the second image to be displayed. And control means for recording a signal,
When the shutter button is deeply pressed within a predetermined time, the control means records the first image signal, and then controls the image pickup means to perform focus control and exposure correction according to a shooting environment. Is adjusted to generate a second image signal, and the second image signal is recorded.

[0008]

DETAILED DESCRIPTION OF THE INVENTION A digital camera to which the present invention is applied will be described in detail below with reference to the drawings. As shown in FIG. 1, the digital camera 1 has an imaging unit 4 that generates an image signal of a subject and A / D-converts the image signal.
A signal processing unit 5 for performing white balance correction and γ correction,
A memory 6 that stores the image signal processed by the signal processing unit 5, an image processing unit 7 that compresses the image signal recorded in the memory 6, and a control unit 8 that controls the shooting operation using these mechanisms. Equipped with.

Further, the digital camera 1 has an LCD panel 9 serving as an electronic viewfinder, and an image captured by the image pickup section 4 is displayed. In addition, digital camera 1
Has a mounting portion to which an IC card for recording the compressed image signal is mounted.

An image pickup section 4 for taking in an image of a subject and generating an image signal is provided on the front surface of the casing of the digital camera 1, and is attached with an image pickup element such as an image pickup lens 12 and a CCD element 13.

A lens control unit 14 is connected to the image pickup lens 12 of the image pickup unit 4, and focus control is performed by the lens control unit 14 which receives a control signal from the control unit 8. Further, the CCD control unit 15 is connected to the CCD element 13 of the image pickup unit 4,
It is controlled by the CCD controller 15 which receives the control signal from the controller 8.

The CCD element 13 produces an image signal from the light taken in by the image pickup lens 12. And C
The CD element 13 outputs the generated image signal to the signal processing unit 5,
It outputs to the detection unit 17.

The detector 17 detects a high frequency component, a brightness component, etc. of the image signal and outputs the detection data to the controller 8. The control unit 8 extracts information necessary for focusing, brightness adjustment, etc. based on the detection data of the received image signal,
After generating the control signal, the control signal is output to the lens control unit 14 or the CCD control unit 15, and the imaging lens 12 and the CC
The D element 13 is controlled.

The signal processing section 5 for performing various signal processing on the image signal output from the CCD element 13 A / D-converts the image signal generated by the CCD element 13 and receives a control signal from the control section 8. White balance correction and γ correction. The signal processing unit 5 is connected to the memory 6 that stores the image signal, and outputs the image-processed image signal to the memory 6.

The data bus of the memory 6 has an image processing unit 7
And the image display circuit 20 are respectively connected. The image processing unit 7 processes the image signal stored in the memory 6 in JPEG format.
Etc. to a predetermined file format. After that, the image processing unit 7 outputs the compressed image signal to the mounted IC card via the card interface.

The image display circuit 20 also converts the image signal stored in the memory 6 and outputs the image to the LCD panel 9 serving as an electronic viewfinder.

The digital camera 1 has a shutter button 25 which serves as a trigger for capturing an object on the upper surface of the housing.
Are formed. The shutter button 25 is formed so that it can be pressed in two steps: shallow pressing and deep pressing. Further, the shutter button 25 is connected to a detection switch 26 that detects a pressed state. The detection switch 26 is connected to the control unit 8 described later, so that the shutter button 25
The control unit 8 detects each pressed state, that is, no pressed state, a shallow pressed state, or a deep pressed state.

The control unit 8 for controlling the photographing operation is an MPU.
It is composed of a (microprocessing unit), and is connected to an IC card mounted via a card interface 21 in addition to the lens control unit 14, the CCD control unit 15, the detection unit 17, the image display circuit 20, and the like described above.

When the subject is photographed, the control unit 8 receives from the detection unit 17 the data such as the high frequency component and the brightness component of the image signal output from the image pickup unit 4 and the focus data of the captured image, After calculating control signals necessary for camera control such as white balance correction, exposure correction by shutter speed and aperture, and focusing, it is output to the lens control unit 14 and the CCD control unit 15. Then, the control unit 8 outputs the image signal stored in the memory 6 to the image processing unit 7,
The compressed image data is output to the IC card.

The control unit 8 is also connected to a detection switch 26 for detecting the pressed state of the shutter button 25, and detects the pressing transition of the shutter button 25. Then, the control unit 8 captures an image after the camera control, or captures a plurality of images before and after the camera control and selects any one of the images according to the transition of pressing the shutter button 25.

The detection switch 26, which is connected to the control unit 8 and detects the depressed state of the shutter button 25, is a shutter button 25.
Is provided with a first switch 26a for detecting a state where the shutter button 25 is pressed shallowly and not deeply, and a second switch 26b for detecting a state where the shutter button 25 is pressed shallowly and deeply. The first and second switches 25
The values a and 25b are input according to the stroke of the shutter button 25 being pressed. Then, when the shutter button 25 is shallowly pressed, the detection switch 26 has a first switch 26a.
Is entered. When the first switch 26a is input,
The control unit 8 that has detected this generates the second image signal by controlling the image capturing unit 4 to perform focusing according to the shooting environment and exposure correction using the shutter speed and aperture.

Further, the detection switch 26 is the shutter button 2
When 5 is pressed deeply, the second switch 26b is input. When the second switch 26b is input, the control unit 8 that detects this input captures the second image signal that has been subjected to focus adjustment according to the shooting environment and exposure correction by the shutter speed and aperture by the image pickup unit 4. To do.

The digital camera 1 having such a configuration
Is used as follows.

The digital camera 1 displays an image after performing camera control such as exposure compensation for adjusting focus, aperture and shutter speed according to the photographing environment in accordance with the user's transition of pressing the shutter button 25. Capture and also
After capturing the first image signal generated by roughly adjusting the image capturing unit 4 in advance, the camera control of the image capturing unit 4 is further performed, and after generating the second image signal, the second image signal is captured.

Specifically, in the digital camera 1, as shown in FIG. 2, the pre-camera control is performed by the control unit 8 before the shutter button 25 is pressed, and the lens control unit 14 or C is operated.
The CD controller 15 is driven, and the image pickup unit 4 performs rough adjustment such as focusing and brightness adjustment to generate a first image signal. At this time, the control unit 8 detects data necessary for focusing, exposure correction, etc. from the image data generated by the image pickup unit 4 and performs a predetermined calculation process, and then the lens control unit 14 and the CCD control unit 15 Control signal and output a control signal to the image display circuit 20 or the like to display the coarsely adjusted image at L
It is displayed on the CD panel 9. It should be noted that the image capturing unit 4 performs the above-described rough adjustment so as to be able to immediately respond to the moving image even when the digital camera 1 captures the moving image.

When the shutter button 25 is pressed in two steps from a shallow press to a deep press with a certain time interval, the control section 8 causes the shutter button 25 to be pressed shallowly so that the first The camera control such as exposure correction for adjusting the focusing, aperture, shutter speed and the like for the image pickup unit 4 by driving the lens control unit 14 and the CCD control unit 15 with the input of the switch 26a of No. 2 as a trigger. Then, the second image signal is generated. After that, the control unit 8
When the shutter button 25 is deeply pressed, the input of the second switch 26b is used as a trigger to capture the image generated by the camera control and output the image data to the memory 6. Next, the control unit 8 outputs the image data in the memory 6 to the image processing unit 7, and the JPEG
The compressed image data is output to a connected IC card via the card interface 21.

Further, as shown in FIG. 3, when the shutter button 25 is pressed all at once from a shallow push to a deep push, the control section 8 has the first and second switches 26 within a fixed time.
By inputting a and 26b as a trigger, the image signal generated by coarsely adjusting the image pickup unit 4 in advance by the pre-camera control is captured before the shutter button 25 is pressed,
The image data is output to the memory 6. After that, the control unit 8
Outputs a control signal to the image pickup section 4 to perform camera control such as focus adjustment, exposure correction by diaphragm and shutter speed adjustment according to the shooting environment. After that, the control unit 8
Captures the image signal generated by the camera control and outputs the image data to the memory 6. After that, the control unit 8 compares the images captured before and after the camera control, and based on the predetermined parameters such as the focus accuracy and the exposure amount, the evaluation value of the image captured before the camera control is below a predetermined threshold value. In some cases, this is output to the image processing unit 7, and after compression processing, the image signal is output to the IC card.

As described above, the control unit 8 controls the shutter button 25.
Is connected to the detection switch 26 for detecting the pressing state of the shutter button 25 and detects whether the shutter button 25 has been fully pressed within a certain period of time, or whether the shutter button 25 has not been pressed within a certain period of time and is pressed in two stages. To do. Then, when the shutter button 25 is pressed all the way down at once, it is determined that the urgency of the user's image capture is high, so the control unit 8 controls the pre-camera control before performing camera control such as focusing and exposure correction. The image signal generated by is captured. Then, the control unit 8 changes the image generated by the pre-camera control to
Based on a predetermined parameter, the image captured after the camera control is compared and evaluated. As a result, when the evaluation value of the image generated by the pre-camera control is less than or equal to a predetermined threshold value, the control unit 8 selects the image generated by the pre-camera control, compresses it, and records it in the IC card. .

Therefore, according to the digital camera 1 to which the present invention is applied, a subject can be taken while omitting the time required for camera control, and an image closer to a photo opportunity can be recorded. Even in this case, I
The image generated by the pre-camera control recorded on the C card is comparable to the image captured after the camera control in various parameters (focus accuracy, exposure amount, etc.), and is more comparable to the image captured after the camera control. Also, an image in which a state closer to the photo opportunity is recorded for the time required for camera control is recorded.

The control unit 8 may capture the image before and after the camera control, display the image output to the memory 6 on the LCD panel 9, and allow the user to select the image. That is, the control unit 8 stores the image captured before the camera control in the memory 6 and displays it on the LCD panel 9 together with the image captured after the camera control for the user's selection. Then, the control unit 8 outputs, to the image processing unit 7, one or both of an image selected by the user, which is captured at a time point closer to the shutter chance without camera control, and an image captured after camera control. And record it on the IC card. This allows the user to compare and select an image captured after the camera is controlled according to the shooting environment and an image captured in the state where the pre-camera is controlled and closer to the photo opportunity. it can.

Next, the operation of the digital camera 1 to which the present invention is applied will be described.

As shown in FIG. 4, in the digital camera 1 to which the present invention is applied, when the power of the apparatus is turned on in step S1, the system such as the control unit 8 is activated. Then, in step S2, the control unit 8 is added as a pre-process when capturing an image captured by roughly adjusting the imaging unit 4 before camera control,
The flag for determining whether or not the image signal generated by the pre-camera control is captured is cleared. Next, in step S3, the control unit 8 sets the camera control mode to the "pre-camera control" mode, and performs pre-camera control such as focus and brightness on the imaging unit 4 before the shutter button 25 is pressed. Do and capture the image. That is,
The control unit 8 performs a predetermined calculation on the image signal previously captured by the image capturing unit 4 based on the image information transmitted by the detection unit 17, and transmits a control signal to the image capturing unit 4 for focusing. And exposure compensation. The image signal generated by this pre-camera control is displayed on the LCD panel 9 serving as an electronic viewfinder via the image display circuit 20.

Then, in step S4, the controller 8
Detects the operation transition of the detection switch 26 to detect whether or not the shutter button 25 has been deeply pressed at once in a fixed time. If the shutter button 25 is not pressed all the way down within a certain period of time, in step S5, the control unit 8
Detects whether or not the shutter button 25 has been shallowly pressed.
Then, the control unit 8 repeatedly detects the operation transition of the shutter button 25 when the shutter button 25 is neither deeply pressed nor shallowly pressed within a certain time.

A loop for monitoring the operation transition of the shutter button 25 is formed by counting a certain period of time in which the urgency of capturing an image is estimated, and the shutter button 25 is suddenly deepened in one loop. When the switch is pressed and the first and second switches 25a and 25b are input, it is determined that the urgency of the user's image capture is high, and the control unit 8 first performs the coarse adjustment of the image capturing unit 4 in advance by the pre-camera control. The captured image is captured. Specifically, the shutter button 25 is deeply pressed in one loop, and the first and second switches 25a, 2
When 5b is input, the control unit 8 determines in step S6 whether or not the image captured before the camera control can be captured. Then, the control unit 8
In step S7, the image captured by the image pickup unit 4 is captured, and in step S8, a flag for determining that the image is captured before camera control is set. Then, in step S9, the control unit 8
Shifts to camera control according to the shooting environment as in the case of normal shooting, and captures an image captured by the image pickup unit 4 under the camera control. Therefore, the control unit 8 captures an image while omitting the time required for normal camera control, and thus can capture an image closer to a photo opportunity.

On the other hand, when the shutter button 25 is not pushed deeply into the above-mentioned one loop but is pushed shallowly and only the first switch 26a is input, in step S10,
It is determined that the urgency of the user's image capture is not high, and the control unit 8 controls the image pickup unit 4 to perform camera control such as exposure correction by controlling focus adjustment, aperture, and shutter speed according to the shooting environment. Is done. Specifically, the shutter button 25 is pressed shallowly in one loop,
When only the switch 26a of is input, the control unit 8 performs arithmetic processing necessary for focusing and exposure correction based on the image data captured by the image capturing unit 4, and transmits a control signal to the image capturing unit 4. The camera is controlled, and the normal shooting mode is set to capture the image captured by the image capturing unit 4 under the camera control. At this time, in step S11, when the shallow press of the shutter button 25 is released, the control unit 8 again performs rough adjustment of the image captured in the image capturing unit 4 by the pre-camera control and displays it on the LCD panel 9. The camera control mode is set.

Next, in step S12, the control section 8 forms a loop for detecting whether or not the shutter button 25 is further pressed from the shallowly pressed state. Then, when the shutter button 25 is deeply pressed, the control unit 8 waits for the camera control described above to end in step S13, and captures the camera-controlled image in step S14. Therefore, the user can take an image in which the focus, the exposure amount, and the like are adjusted with higher accuracy.

Next, in step S15, the control unit 8 determines whether or not there is a flag for determining whether or not the image generated by the image pickup unit 4 which is roughly adjusted by the pre-camera control is captured. If there is a flag, in step S16, the control unit 8 evaluates the image generated by the imaging unit 4 roughly adjusted by the pre-camera control based on various parameters, and the evaluation value is equal to or less than a predetermined threshold value. It is determined whether or not. This parameter is, for example, focus accuracy or exposure amount. And step S1
In 7, when the evaluation value of the image generated and captured by the pre-camera control is less than or equal to a predetermined threshold value, the control unit 8 selects this image.

On the other hand, when the image generated by the image pickup unit 4 roughly adjusted by the pre-camera control is not captured and the above-mentioned discrimination flag is cleared, or the image pickup unit roughly adjusted by the pre-camera control is used. If the evaluation value of the image generated and captured by the image capturing unit 4 is higher than the predetermined threshold value, the control unit 8 selects the image generated and captured by the camera-controlled image capturing unit 4 in step S18.

Then, the control section 8 outputs the image selected in step S17 or step S18 to the memory 6, and in step S19 outputs it to the image processing section 7 to compress it into a predetermined file format such as JPEG. In step S20, the compressed image data is written in the IC card mounted via the card interface 21.

As described above, according to the digital camera 1 to which the present invention is applied, the urgency of image capture by the user is estimated according to the transition of the shutter button 25 being pressed, and the focus accuracy, brightness, etc. An image captured by the image-capturing unit 4 that has been coarsely adjusted and an image captured by the image-capturing unit 4 on which camera control such as focus control and exposure correction is performed according to a shooting environment;
Comparative evaluation is performed based on predetermined parameters such as focus accuracy and exposure amount. Then, the control unit 8 of the digital camera 1 selects this image when the evaluation value of the image generated and captured by the pre-camera control is less than or equal to a predetermined threshold value, outputs it to the image processing unit 7, and outputs it to the IC card. Record.

Therefore, according to the digital camera 1 to which the present invention is applied, the captured image can be recorded while omitting the time required for normal camera control.
It is possible to capture an image closer to a photo opportunity than the image captured after camera control.

Note that the digital camera 1 can be switched so as to capture only the image captured by the image pickup section 4 under the camera control, regardless of the transition of pressing the shutter button 25.

That is, when the subject is dark and the flash light emission is required, if the flash light emission is performed when the image generated by the pre-camera control is captured, when the image of the camera-controlled image pickup unit 4 is captured. The flash may not be able to catch up. Then, waiting for the preparation for strobe light emission may increase the delay from the photo opportunity. Also, the subject is dark,
If you need to slow down the shutter speed, it will take more time to capture the image, so capturing the image generated by the pre-camera control is more important than capturing the image captured after the camera control. The delay from the photo opportunity may increase. Furthermore, even if the image is captured after the focus, brightness, etc. are sufficiently adjusted by the camera control, there are cases where the photo opportunity is reached.

Therefore, when the control unit 8 detects from the image signal generated by the pre-camera control that the flash light emission or the shutter speed needs to be slowed, the control unit 8 automatically captures the image generated by the pre-camera control. Prohibit Specifically, as shown in FIG. 5, the control unit 8 causes the shutter button 25 to be pressed all at once from a shallow push to a deep push, and the first and second switches 26a, 26a,
Even when 26b is input, image data is detected for the image captured by the image capturing unit 4 that has been roughly adjusted before the shutter button 25 was pressed, such as focusing and brightness adjustment. As a result, when it is determined that it is necessary to reduce the flash light emission or the shutter speed, the normal shooting mode is set. Then, the control unit 8 performs camera control such as focus control, exposure correction by diaphragm and shutter speed adjustment. After that, the control unit 8 captures the camera-controlled image immediately after the camera control is finished, and stores it in the memory 6
Also, the data is output to the image processing unit 7, the image data is compressed, and written in the IC card.

In this case, the control unit 8 prohibits the capture of the image captured before the camera control. Therefore, in step S4 shown in FIG. 4, the control unit 8 presses the shutter button 25 at once in one loop that monitors the operation transition of the shutter button 25, and inputs the first and second detection switches 26a and 26b. Even in such a case, in step S6, the camera control is performed in the normal shooting mode, and the image is captured after the camera control.

As a result, the digital camera 1 to which the present invention is applied does not capture the image generated by the pre-camera control in the case of photographing requiring strobe light emission or photographing with a slow shutter speed. It is possible to capture an image on which camera control such as focusing and exposure amount adjustment is performed without significantly delaying from the photo opportunity.

[0047]

As described above, according to the still image pickup device of the present invention, the urgency of the image capture of the user is estimated according to the pressing speed of the shutter button, and the image capture is performed before the camera control. An image and an image captured after camera control are captured, and the images captured before and after camera control are evaluated based on predetermined parameters. Then, the still image capturing apparatus according to the present invention records the image when the evaluation value of the image captured before the camera control is less than or equal to a predetermined threshold value.

Therefore, according to the still image pickup apparatus of the present invention, the image is captured while omitting the time required for the normal camera control, so that the image closer to the shutter chance can be shot and the shutter chance is missed. Can be prevented.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a digital camera to which the present invention has been applied.

FIG. 2 is a digital camera to which the present invention is applied,
It is a figure which shows the operation sequence of image capture when a shutter button is pushed down slowly.

FIG. 3 shows a digital camera to which the present invention is applied,
It is a figure which shows the operation procedure of an image capture when a shutter button is pushed down at a stretch.

FIG. 4 is a flowchart showing an operation procedure of a digital camera to which the present invention has been applied.

FIG. 5 is a diagram for explaining the operation sequence of image capture when the shutter button is pressed all at once when the capture of a roughly adjusted image is prohibited.

[Explanation of symbols]

1 digital camera, 4 imaging unit, 5 signal processing unit, 6
Memory, 7 image processing unit, 8 control unit, 9 LCD panel, 17 detection unit, 18 focus detection unit, 25 shutter button, 26 detection switch

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) H04N 5/238 G02B 7/11 N // H04N 101: 00 G03B 3/00 AF term (reference) 2H002 AB01 CD00 FB02 FB03 FB27 FB28 FB33 FB38 FB51 FB84 GA54 HA05 JA07 2H011 AA03 DA00 2H051 AA00 EA14 EA25 EB09 5C022 AA13 AB03 AB15 AB17 AB28 AB29 AC03 AC32 AC42 AC74

Claims (5)

[Claims] 1. An image pickup unit for picking up an image of a subject, an image processing unit for processing an image signal generated by the image pickup unit, an image output unit for outputting an image processed by the image processing unit, and a shallow press or A shutter button that is formed so that it can be pressed in two steps of deep pressing and serves as a trigger for capturing an image of a subject, and coarse adjustment of focus control and exposure correction is performed by controlling the image capturing unit, and at the same time a first image signal is generated. When the shutter button is pressed shallowly, the image signal generated by the image pickup means is detected, and by controlling the image pickup means, focus control and exposure correction are adjusted according to the shooting environment. A control means for generating an image signal and recording the second image signal by further pressing the shutter button, wherein the control means has a predetermined shutter button. When it is pressed deeply within the interval, the first image signal is recorded, and then the image pickup means is controlled to perform focus control and exposure correction adjustment according to the photographing environment to generate the second image signal. Then, the still image pickup device for recording the second image signal. 2. The control means compares one of the first image signal and the second image signal and selects one image when the shutter button is deeply pressed within a predetermined time. The still image pickup device according to claim 1, wherein the still image pickup device is recorded. 3. The control means causes the image output means to output an image based on the first image signal and the second image signal when the shutter button is deeply pressed within a predetermined time. The still image pickup device according to claim 1, wherein one image selected by the user is recorded from the displayed images. 4. The control means records the first image signal when the shutter speed is within a predetermined time, and then controls the image pickup means to perform focus control and exposure according to a shooting environment. The still image pickup device according to claim 1, wherein the second image signal is generated by performing correction adjustment and the second image signal is recorded. 5. The control means records the first image signal when strobe light emission is not performed, and then controls the image pickup means to perform focus control and exposure correction adjustment according to a shooting environment. The still image pickup device according to claim 1, wherein the second image signal is generated and the second image signal is recorded.