JP4786452B2 - camera - Google Patents

Description

  The present invention relates to an improvement of a digital camera, and more specifically, not only a simple still image using the entire area of an image sensor, but also a part of an image of the image sensor is cut out and shot in a shooting mode called digital zoom or electronic zoom. The present invention relates to a camera equipped with a display means that makes it possible to monitor the effects easily while making full use of these photographing methods.

2. Description of the Related Art In recent years, as in Japanese Patent Application Laid-Open Publication No. 2003-259542, a camera having an electronic zoom function by devising a thinning method when reading pixels of an image sensor has been known.
JP 2001-45364 A

  The optical zoom can only enlarge the center of the screen, but if the electronic zoom is used, it is possible to enlarge the area desired by the user. Furthermore, it is possible to take an application such as simultaneously shooting a wide-angle image and an enlarged telephoto image.

  There are also a variety of ways to enjoy images. In addition to printing the L version etc., consider various cases such as attachment to a homepage, transmission to a mobile phone, appreciation on a camera-equipped LCD, etc. Can do.

  However, these functions are not fully used by users, and in fact, the electronic zoom function is not considered as an important specification in the camera compared to the optical zoom function. there were.

  With the recent rapid increase in pixels of image sensors, the number of pixels at the time of electronic zoom is also increasing, and the image quality of recorded images is approaching the practical level, but the conventional way of thinking is followed. The monitor image was not improved. Therefore, it is considered that the cause is that the user was not able to sufficiently appeal the effect.

  Furthermore, in the electronic zoom method described in the above-mentioned patent document, when the electronic zoom is used (the enlargement ratio exceeds 2 times), the ratio of the thinning-out ratio of the display image is reduced to improve the image quality of the monitor image. However, a time lag occurred during shooting, and there was a possibility of losing the shutter chance.

  Accordingly, the present invention has been made in view of the above circumstances, and its purpose is to obtain a high-quality monitor image even when using an electronic zoom in consideration of the characteristics of an image pickup device such as a CCD. It is to provide a camera that can obtain unaffected images.

  That is, the invention described in claim 1 includes at least a first readout mode for reading out image data corresponding to all pixels of the image sensor and a second readout mode for reading out image data of a plurality of pixels in the image sensor. In a camera having an electronic zoom mode as a photographing mode, comprising: an image pickup device having a display means for displaying the image data; and a recording means for recording image data read from the image pickup device on a recording medium. When the shooting mode is the electronic zoom mode, the readout image in the second readout mode is displayed as a monitor image and stored in the memory by circular update, and stored in the memory in response to the release operation. A second image obtained by cutting out a part of the image data read out from the first image data in the first reading mode. Characterized by recording on the recording medium together with data.

  According to a second aspect of the present invention, in the first aspect of the invention, when the recorded image is displayed and the shooting mode is the electronic zoom mode, the recorded first image is displayed. The image data and the second image data are read and compared, and if there is a difference between them, the two images are displayed in parallel on the display means.

According to a third aspect of the present invention, in the first aspect of the present invention, when the photographing mode is the electronic zoom mode and the movement of the subject is smaller than a predetermined value, the reading by the second reading mode is performed. characterized in that to be displayed on the display means an image as the monitor images.

  According to a fourth aspect of the present invention, in a camera having an electronic zoom mode for electrically enlarging a subject image, a first read mode for reading image data corresponding to all pixels of the image sensor, An image sensor having at least a second readout mode in which image data of a plurality of pixels are added and read out; display means for displaying image data; and the second mode when the photographing mode is an electronic zoom mode. Display control means for displaying image data in the readout mode as a monitor image on the display means, recording means for recording the image data on a recording medium, and the second readout mode when the photographing mode is an electronic zoom mode Storage means for storing the image data by the circular update while displaying the monitor image, and when the shooting mode is the electronic zoom mode. In addition, the first image data stored in the storage means is recorded together with the second image data obtained by cutting out a part of the image data read in the first read mode in response to the release operation. Recording control means for controlling the recording means.

  According to a fifth aspect of the present invention, in the invention according to the fourth aspect, when the display control means displays the recorded image and the photographing mode is an electronic zoom mode, The recorded first image data and second image data are read and compared, and if there is a difference between the two, the two images are displayed in parallel on the display means.

  According to a sixth aspect of the present invention, the display control means according to the fourth aspect of the present invention is configured such that the display control unit is configured such that when the photographing mode is the electronic zoom mode and the movement of the subject is smaller than a predetermined value, An image corresponding to the image data read in the two-read mode is displayed on the display means.

The invention according to claim 7 includes at least a first readout mode for reading out image data corresponding to all pixels of the image sensor and a second readout mode for reading out image data of a plurality of pixels in the image sensor. An image sensor, display means for displaying the image data read from the image sensor, recording means for recording the image data read from the image sensor on a recording medium, and image data read from the image sensor are circulated and updated. comprising a temporary storage means for storing the said and displays on the display means the read image as a monitor image image by the second read mode, the said temporary storage means a read image by second read mode as the first image data In response to a release operation, the first image data stored in the temporary storage means is stored in a cyclic update. With serial second image data obtained by cutting out a portion of the image data read by the first read mode, characterized in that comparably displayed or the display means is recorded on the recording medium.

  According to the present invention, a camera capable of effectively and effectively displaying a monitor screen even when photographing with an electronic zoom using a system capable of pixel addition and pixel thinning, and does not miss a photo opportunity. Can be provided.

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

  First, the concept of electronic viewfinder display of a general digital camera will be described with reference to FIG.

  Many CCDs, which are image pickup devices, have three image data reading modes as shown in FIG. First, as shown in FIG. 2A, when all the pixels are read out, a high-accuracy image is obtained, and therefore, it is used during normal still image shooting. However, since it takes a lot of time to read out all the pixel data of nearly 10 million pixels, for example, only 3 to 4 frames can be read per second (referred to as 4 fps mode).

  Further, in FIG. 2B, since some pixels are mixed (added) and read out, the number of pixels is smaller than in the case of FIG. 2A, but can be read out at a higher speed. For example, when 9 pixels of 3 horizontal pixels and 3 vertical pixels are added (mixed) and read out, reading at a speed of about 30 frames per second is possible. For example, an image of about 1 million pixels is obtained with a 10 million pixel CCD (referred to as a 30 fps mode).

  Further, in FIG. 2C, since this pixel mixture is thinned and output, it can be read out at a speed of 60 frames / second (fps) which can be seen as a smooth moving image. (The figure is different from the actual thinning method, but is displayed in an easy-to-understand manner). If the total number of pixels is 10 million pixels, the image obtained at this time is approximately 500,000 pixels.

  Such an image in the 60 fps mode shown in FIG. 2C is not sufficient for printing or photography, but it has a built-in camera that determines the composition at the time of taking a picture and confirms the image. The number of pixels is sufficient for observation with a liquid crystal panel (LCD). Since this LCD is generally equivalent to 200,000 pixels, if it is resized from 500,000 pixels, there will be no problem image quality.

  Therefore, as shown in FIG. 3A, the composition is determined while observing an image in the 60 fps mode, and the release button is pushed into the photo opportunity, and a full pixel screen (as shown in FIG. A system in which shooting is performed by switching to a mode of 4 fps mode is common.

  However, on the other hand, as shown in FIG. 4A, in the electronic zoom photographing that cuts out only a part of the 4 fps mode image as shown in FIG. 4B while viewing the 60 fps mode image, While viewing the enlarged screen as shown in FIG. 5 (a), a part of the image is cut out and photographed as shown in FIG. 5 (b). In other words, if the area of one quarter of the entire area is cut out, the number of pixels of 2.5 million pixels can be secured at the time of shooting, but the display is only a quarter of the number of pixels of 500,000 pixels. As a result, the 200,000 pixels of the LCD cannot be filled. In this case, even if the composition can be confirmed, for example, the expression of a distant human subject is often crushed, and it cannot be confirmed on the LCD whether or not a beautiful picture can be taken. That is, at the time of electronic zoom, satisfactory photography cannot be performed by the conventional extension concept of the relationship between the monitor image of 60 fps and the captured image of 4 fps as shown in FIGS.

  Therefore, in the present invention, as shown in FIG. 6A during electronic zoom, a monitor image is created using an image in the 30 fps mode, and during shooting, as shown in FIG. 6B, A method of cutting out from full pixels is adopted. As a result, out of about 1 million pixels in the 30 fps mode, about 250,000 pixels, which is a quarter, can be applied to the display, so that high-definition display sufficient to satisfy the number of pixels of the LCD becomes possible.

  As described above, when a good image is obtained on the LCD, the user is motivated to shoot and the stress during shooting is reduced. However, when such a display method is used, the readout cycle from the image sensor is delayed, and therefore, when a picture is taken after viewing the display at the time of release, there is a high possibility that a chance will be lost due to a time lag. Therefore, in the present invention, as described later, at the time of shooting in the electronic zoom mode, a high-definition image in the 4 fps mode as shown in FIG. 7B and a shooting as shown in FIG. The monitor display image at that time is also recorded so that both an image with a small time lag and a high-definition image can be left.

  Next, the camera of the present invention will be described with reference to FIG.

  FIG. 1 is a block diagram showing a basic configuration of a digital camera according to an embodiment of the present invention. The digital camera (hereinafter abbreviated as “camera”) includes a main CPU (hereinafter abbreviated as “MPU”) 11, a zoom control unit 12, a zoom lens (photographing lens) 13, an image sensor 15, and an analog front end unit ( AFE) 16, image processing circuit 18, temporary storage unit 19, display control unit 20, display unit 21, image comparison unit 23, recording control unit 24, media 25, and a plurality of switches 28a and 28b. , 28c.

  The MPU 11 having a function as a control means is composed of a microcontroller or the like, and detects various operations by the user based on the states of the switches 28a, 28b, and 28c. The MPU 11 sequentially controls each block described above at the time of photographing according to the detection results of the switches 28a, 28b, 28c and a predetermined program. According to the operation of these switches 28a, 28b, and 28c, the mode switching unit 11a in the MPU 11 can also perform shooting / playback mode switching, shooting mode switching, and the like. In addition, the zooming operation, which is a feature of the present invention, is also executed by the MPU 11 detecting that the user operates the switch thus configured.

  The switches 28a to 28c have functions of a power switch (28a) for turning on / off the power, a release switch (28b) for performing a release operation, and shooting / playback and other switches (28c). The user's operation is input.

  An image from the subject 30 is received through the zoom lens 13 by an image sensor 15 including a CMOS sensor, a CCD, or the like including a large number of light receiving surfaces (pixels). Since this is converted into an electrical signal in the image sensor 15, this result is converted into a digital signal by the AFE 16 including the A / D converter and further input to the image processing circuit 18.

  The image sensor 15 has a pixel addition function. Further, the AFE 16 has a function (cutout unit 16a) for selecting a signal output from the image sensor 15, and only a limited range of image data or thinned out pixel data from all light receiving surfaces. Can be extracted. By this control, the 4 fps mode, 30 fps mode, and 60 fps mode described above are switched.

  The image processing circuit 18 corrects the color, gradation, and sharpness of the input signal, and is compressed by a still image compression unit such as a JPEG core unit (not shown) in the image processing circuit 18 at the time of shooting. The result is recorded on a medium 25 as a recording unit via a recording control unit (recording unit, recording control unit) 24. The recorded compressed data is reproduced by the image processing circuit 18 and displayed on the display unit 21 as display means via the display control unit 20 as display control means so that it can be viewed. The display unit 21 is made of liquid crystal, organic EL, or the like, and also functions as a camera finder.

  The image processing circuit 18 has a resizing circuit 18a. The resize circuit 18 a is processed and input to the display unit 21 controlled by the display control unit 20 so that the signal from the image sensor 15 can be displayed. In the present invention, a 60 fps mode image is displayed on the display unit 21 as a monitor image when the electronic zoom is not used, and an image in the 30 fps mode is obtained as much as possible even when enlarged in the electronic zoom. The image is enlarged in accordance with the electronic zoom state at that time and displayed on the display unit 21 as a monitor image. While viewing the monitor image displayed on the display unit 21, the user determines the composition and timing at the time of shooting and performs the release operation. Since this monitor image has a higher definition than that of the conventional camera in the 60 fps mode, it is possible to shoot while enjoying a good image even during electronic zooming. Further, as described above, since two images are acquired at the time of shooting in the electronic zoom mode, two images are compared by the image comparison unit 23 at the time of image reproduction, and when there is a large difference between the two images, Both images are displayed side by side.

  Further, the camera has a temporary storage unit 19, which can store an image being displayed on the monitor. In particular, the monitor image in the 30 fps mode is stored so that the time lag at the time of shooting that was not a concern in the 60 fps mode does not become a problem. The user's operation is detected according to the state of the switches 28a to 28c described above, and the MPU 11 determines that and sequentially controls each block at the time of shooting.

  The zooming operation, which is a feature of the present invention, is also executed when the MPU 11 detects that the above-described switches 28a to 28c have been operated by the user. That is, first, when a zoom operation is performed in a state where the electronic zoom mode is set, a process of cutting out a partial image from the image sensor 15 is executed by the AFE 16 under the control of the MPU 11, and the cut out partial image is executed. Is enlarged and displayed on the display unit 21 as an entire image, and recorded on the medium 25 which is a recording medium.

  The supplementary image can be recorded together at the time of the electronic zoom, but this is the data stored in the temporary storage unit 19, which is obtained in the 30 fps mode from the image sensor 15 at the time of the electronic zoom. It is the image that was made. As will be described later, this is always stored prior to the release operation. However, if all of them are held, the storage capacity of the temporary storage unit 19 will be full, so that the renewal of updating new image data by discarding old image data is performed.

  Next, based on such an idea, the photographing operation of the camera in one embodiment of the present invention will be described with reference to the flowchart of FIG. The operation of this camera is mainly performed by controlling the MPU 11 in the camera.

  First, in order to capture the state of the subject 30 at high speed and display it on the display unit 21 that also serves as a camera finder, in step S1, the data of the image sensor 15 is in 60 fps (speed of 30 frames per second) mode. Are read out. Next, in step S2, it is determined whether the displayed image is in the 60 fps mode. Here, if it is 60 fps mode, it will transfer to step S4 and the temporarily stored image data will be cleared. In step S5, the image read in the 60 fps mode is displayed on the display unit 21. Then, in subsequent step S6, it is determined whether or not photographing is executed.

  Here, if the photographing (release) operation is not yet started, the process proceeds to step S7. Next, in step S7, it is determined whether or not a zoom operation has been performed. If the zoom operation is not performed, the process proceeds to step S2. If the zoom operation is performed, the process proceeds to step S8.

  In step S8, it is determined whether the zoom operation to be performed is on the telephoto side or the wide-angle side. Here, if it is operated to the telephoto side, the process proceeds to step S9, and if it is operated to the wide angle side, the process proceeds to step S10, and zoom control is performed accordingly. In step S11, it is determined whether or not the zoom range of the zoom lens 13 is out of the electronic zoom area. This is determined by the MPU 11 based on the position of the zoom lens 13 or the like, for example.

  As a result, if it is determined in step S11 that the electronic zoom region has been entered, the process proceeds to step S12, where an image in the 30 fps mode is selected, and an image in the range determined according to the electronic zoom state is temporarily set. Temporarily stored in the storage unit 19. Since the image acquisition in this mode is enlarged and displayed from a state where the pixels are not so coarse, the appearance at the time of display is improved as described above. Next, in step S13, for example, if the image data size is too large in the 30 fps mode as in step S12, the image corresponding to the display unit 21 cannot be displayed. The size is adjusted. Thereafter, the process proceeds to step S2.

  On the other hand, if it is determined in step S11 that the region is not the electronic zoom region, the process proceeds to step S14. In the optical zoom region, even a 60 fps image with coarse pixels looks fine on the display unit 21, so an image in the 60 fps mode is selected in step S 12. Thereafter, the process proceeds to step S2.

  In step S2, it is determined again whether the display image is in the 60 fps mode. Here, when the 60 fps mode is selected, the process proceeds to step S4. However, when the electronic zoom is performed, since the image is the 30 fps mode at step S12, the process proceeds to step S3 and the display is switched. Is called. Thereafter, an image in any mode is displayed on the display unit 21 in step S5.

  Next, if a release operation is executed in step S6, the process proceeds to step S15, and image reading in the 4 fps mode is performed. This enables recording with high image quality. Next, in step S16, it is determined whether or not it is an electronic zoom area. Here, in the electronic zoom state, it is only necessary to cut out and record an image of a designated range, not an image of the entire area. Therefore, in the electronic zoom area, the process proceeds to step S17, where a predetermined range of reading is designated. Of course, in step S16, since the range is not designated in cases other than the electronic zoom, step S17 is skipped.

  When the reading of the predetermined range is designated, or when it is determined in step S16 that the electronic zoom is not performed, the process proceeds to step S18 and the image processing circuit 18 performs image processing and compression processing. In step S 19, the compressed image data is recorded on the medium 25 via the recording control unit 24.

  Since the monitor image equivalent in the 30 fps mode is always stored by the temporary storage in step S12, even if a time lag occurs until the step execution in step S15, the monitor image equivalent can be obtained later. I have to.

  As described above, according to the present embodiment, as shown in FIG. 9, when zooming is not performed and when optical zooming is performed (not in the electronic zoom mode), a high-definition image 31 using pixels in the entire screen is used. At the time of electronic zoom shooting, as shown in FIGS. 10A and 10B, an image 32 corresponding to a display image with an emphasis on timing (temporarily stored in step 10 of the flowchart of FIG. 8 and step S19). 2) and the high-definition image 33 cut out from the image in the 4 fps mode are recorded, so that the user can select and use them according to their preference. For example, the image 32 shown in FIG. 10 is sufficient for viewing on the display unit 21 provided in the camera, but if considering printing out on a sheet of a size equivalent to the L plate, the image 32 is high. A detailed image 33 is better.

  Further, in a situation where it is desired to see the photographing result immediately after photographing, display control may be performed as shown in the flowchart of FIG.

  Hereinafter, with reference to the flowchart of FIG. 11, the operation of the reproduction process in the camera of this embodiment will be described.

  When this routine is entered, it is first determined in step S21 whether or not two images have been acquired during electronic zoom. If two images have been acquired, the process proceeds to step S22. If not, the process proceeds to step S25. In step S <b> 22, the acquired two images are compared by the image comparison unit 23. As a result, in step S23, the difference between the two images is determined.

  Here, if there is a large difference between the two images due to the movement of the subject or the like, the process proceeds to step S24 so that the two images are compared and displayed. At this time, only the central part of the screen is displayed in parallel on the display unit 21 as shown in FIG. 12 (image 35). Thereafter, the routine is exited.

  On the other hand, if it is determined in step S23 that there is no difference between the two images, or if the two images are not acquired in step S21, the image in the 4 fps mode is preferentially used in step S25. Is displayed. Thereafter, the routine is exited.

  In the above-described flowchart, if there is a difference between the two acquired images, they are displayed in parallel on the display unit 21, but only the selected one is displayed so that the user can select the desired one. Others may not be displayed.

  In the flowchart of FIG. 8 described above, the 30 fps mode is always used at the time of electronic zooming, but the present invention is not limited to this. For example, the mode may be changed according to the movement of the subject.

  FIG. 13 is a flowchart for explaining the operation of the monitor image display during the electronic zoom.

  When this routine is entered, first, in step S31, the movement of the subject is determined. Here, in the case of a subject whose movement of the subject is large (compared to a predetermined value), that is, a fast-moving subject, the process may move to step S32 so that 60 fps mode display with more emphasis on motion may be employed. The movement of the subject may be determined by comparing the image data obtained as needed by the image comparison unit 23. As a result, when it is desired to shoot a fast subject at just the right timing, it is possible to shoot without missing that timing.

  On the other hand, in step S31, if the subject movement is small (compared to a predetermined value), that is, a subject with little movement (for example, a human face during speech), the process proceeds to step S33 and 30 fps. The mode is adopted, and resizing is performed in the subsequent step S34. As a result, it is possible to shoot while confirming the facial expression with a finer monitor image.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention.

  Further, the above-described embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some constituent requirements are deleted from all the constituent requirements shown in the embodiment, the problem described in the column of the problem to be solved by the invention can be solved, and the effect described in the column of the effect of the invention Can be extracted as an invention.

1 is a block diagram illustrating a basic configuration of a digital camera according to an embodiment of the present invention. It is the figure which showed the example of a display of the image by the image data reading mode of general CCD, (a) showed the image of 4 fps mode, (b) showed the image of 30 fps mode, (c) showed the image of 60 fps mode. FIG. (A) shows a monitor image in 60 fps mode, (b) shows a captured image in 4 fps mode, and shows an example of switching from a 60 fps mode image to a 4 fps mode image by a release. It is the figure which showed the example of the electronic zoom which cuts out only a part of 4 fps mode, seeing the image of 60 fps mode. (A) shows a monitor image in which a part of a 60 fps mode image is enlarged by electronic zoom, and (b) shows a captured image obtained by cutting out a part of a 4 fps mode image. FIG. 4 is a diagram for explaining a method employed in the digital camera of the present invention to create a monitor image using a 30 fps mode image during electronic zooming and to cut out from full pixels during shooting. (A) is the figure which showed the monitor display image just before a release, (b) is the figure which showed the example of the high-definition captured image in 4 fps mode. It is a flowchart for demonstrating imaging | photography operation | movement of the camera in one Embodiment of this invention. It is the figure which showed the example of the high definition image 31 using the pixel of the whole screen screen at the time of not performing zoom and at the time of optical zoom. An example of an image obtained by photographing in the electronic zoom mode is shown, (a) is a diagram showing an example of a timing priority image, and (b) is a diagram showing an example of a pixel number priority image. . It is a flowchart for demonstrating the operation | movement of the display process at the time of reproduction | regeneration in the camera of one Embodiment of this invention. It is the figure which showed the example of both the image displays in step S24 of the flowchart of FIG. It is a flowchart for demonstrating operation | movement of the monitor display process at the time of the electronic zoom in the camera of one Embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Main CPU (MPU), 12 ... Zoom control part, 13 ... Zoom lens (photographing lens), 15 ... Image pick-up element, 16 ... Analog front end part (AFE), 18 ... Image processing circuit, 19 ... Temporary memory | storage part, DESCRIPTION OF SYMBOLS 20 ... Display control part, 21 ... Display part, 23 ... Image comparison part, 24 ... Recording control part, 25 ... Media, 28a, 28b, 28c ... Multiple switches, 30 ... Subject.

Claims (7)

An image pickup device having at least a first read mode for reading image data corresponding to all pixels of the image pickup device and a second read mode for adding and reading image data of a plurality of pixels in the image pickup device, and displaying the image data In a camera having an electronic zoom mode as a photographing mode, and a display means for recording, and a recording means for recording image data read from the image sensor on a recording medium.
When the shooting mode is the electronic zoom mode, the readout image in the second readout mode is displayed as a monitor image, and stored in a memory in a circular update,
In response to the release operation, the first image data stored in the memory is recorded on the recording medium together with the second image data obtained by cutting out part of the image data read in the first reading mode. A camera characterized by that.   When displaying the recorded image, if the shooting mode is the electronic zoom mode, the recorded first image data and second image data are read and compared, and if there is a difference between the two, The camera according to claim 1, wherein the two images are displayed on the display unit in parallel. The photographing mode is the electronic zoom mode, when the motion of the object is smaller than a predetermined value, and displaying on the display means reading out Shi image by the second read mode as the monitor image image The camera according to claim 1. In a camera having an electronic zoom mode for electrically enlarging a subject image,
An image pickup device having at least a first read mode for reading image data corresponding to all pixels of the image pickup device and a second read mode for reading out image data of a plurality of pixels among all the pixels;
Display means for displaying image data;
Display control means for displaying image data in the second readout mode on the display means as a monitor image when the photographing mode is an electronic zoom mode;
Recording means for recording the image data on a recording medium;
When the shooting mode is an electronic zoom mode, storage means for storing the image data in the second readout mode by cyclic updating during monitor image display;
When the photographing mode is the electronic zoom mode, the first image data stored in the storage means can be obtained by cutting out part of the image data read in the first read mode in response to the release operation. Recording control means for controlling the recording means to record together with the second image data;
A camera comprising:   When displaying the recorded image, the display control means reads and compares the recorded first image data and second image data when the shooting mode is the electronic zoom mode, 5. The camera according to claim 4, wherein if there is a difference between the two, the two images are displayed in parallel on the display means.   The display control means displays an image corresponding to the image data read in the second readout mode on the display means when the photographing mode is the electronic zoom mode and the movement of the subject is smaller than a predetermined value. The camera according to claim 4. An image sensor having at least a first read mode for reading image data corresponding to all pixels of the image sensor and a second read mode for adding and reading image data of a plurality of pixels in the image sensor, and reading from the image sensor Display means for displaying the received image data, recording means for recording the image data read from the image sensor on a recording medium, and temporary storage means for storing the image data read from the image sensor by circular update. ,
And displays on the display means the read image according to the second readout mode as monitor image image, is stored in a circulating updated on the temporary storage means a read image according to the second read mode as the first image data,
In response to the release operation, the recording medium together with the second image data obtained by cutting out a part of the image data read out in the first reading mode from the first image data stored in the temporary storage means Or a display for comparison with the display means.

Images