JP2008245056A - Photographing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a photographing device that increases the rate of photographing at an opportunity for photographing, immediately after a photographing. <P>SOLUTION: When a main CPU 110 determines that camera shake exceeds a prescribed level, after receiving the detection result from a camera-shake detection sensor 140, the CPU makes a camera-shake correction means 180 correct the camera shake, while it allows photographing of a plurality of pictures by instructing a clock generator 1121 via a photometry/ranging CPU 120. When the main CPU 110 determines that camera shake is lower than a prescribed level, it makes the camera-shake correction means 180 execute the camera-shake correction so as to immediately prepare for the next photographing by reducing the calculation time. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a photographic device that forms an image of a subject on an image sensor with a photographic optical system to generate an image representing the subject.

  Recently, it was reported that an image sensor capable of generating 300 frames per minute with 1.2 mega (1.2 million pixels) was successfully developed. When such an image sensor is used, since many images can be obtained per second, high-definition still image shooting can be obtained by adding pixels in the image for each frame to increase the S / N ratio. In addition, it is possible to correct blur by superimposing a plurality of images by performing a plurality of continuous shootings at a high speed (see, for example, Patent Document 1). In addition, when the above-described image sensor is used, as described in Patent Document 2, when the subject moves quickly, the photographing interval can be shortened to suppress camera shake or subject blur.

  By the way, conventionally, in an imaging apparatus, by detecting a camera shake by a camera shake detection sensor, the image pickup element is moved relative to at least one of the optical elements constituting the imaging optical system in accordance with the detected camera shake state. A technique for correcting camera shake (hereinafter referred to as optical camera shake correction) and high-speed continuous shooting during one frame to detect a motion vector from the motion of the image for each frame and superimpose the images according to the detected motion Techniques for correcting camera shake by combining them (hereinafter referred to as electronic camera shake correction) have been proposed (for example, Patent Documents 3 to 9). When this electronic blur correction is performed, a more remarkable effect can be obtained by using an image sensor having a high frame rate as described above.

  In addition, among the above-mentioned patent documents, for example, as disclosed in Patent Documents 8 and 9, there are those in which optical shake correction and electronic shake correction are used in combination according to the occurrence of camera shake. As described in Patent Document 8 and Patent Document 9, when optical blur correction and electronic blur correction are used in combination, the blur is suitably corrected regardless of the blur.

  Patent Document 8 proposes a technique for optically controlling the posture of a camera body so that the centers of a plurality of images are aligned by using both optical blur correction and electronic blur correction. No. 9 is a technique that uses optical blur correction and electronic blur correction together to perform optical blur correction when shooting each frame when shooting a plurality of frames, and to perform electronic blur correction when connecting each frame. Proposed.

  However, in the technique of Patent Document 9, electronic blur correction is always executed even in a situation where camera shake can be corrected by optical blur correction, so that the calculation time required for each photographing always becomes long. I have it. This problem is likely to occur even in Patent Document 8 where the distinction between optical blur correction and electronic blur correction is not clearly shown in the specification.

Despite the fact that electronic blur correction can be used to correct camera shake, if electronic blur correction is always used in combination and the computation time required for a single shot becomes longer, it will not be possible to take a picture immediately after taking a picture. End up.
JP-A-6-284327 JP 2006-135501 A JP 11-252445 A JP-A-5-14801 JP 2006-135501 A JP 2006-310969 A JP 2004-159051 A Japanese Patent Application Laid-Open No. 9-139981 JP 2002-27312 A

  SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide an imaging apparatus that increases the rate at which photography can be performed at a photo opportunity immediately after photography.

The imaging device of the present invention that achieves the above-described problem is an imaging device that forms an image of a subject on an image sensor with a shooting optical system and generates an image representing the subject.
A camera shake detection sensor for detecting camera shake;
A camera shake level determination means for determining whether a camera shake detection result before photographing by the camera shake detection sensor is in a first camera shake state in which a camera shake detection result is equal to or lower than a predetermined level or a second camera shake state in which a predetermined level is exceeded;
When the determination result by the camera shake level determination means is the determination result that the first camera shake state is present, shooting is performed in the first shooting mode that generates a single shot image at the time of shooting. Photographing means for performing photographing in a second photographing mode for generating a plurality of consecutive photographed images when the judgment result by the hand shake level judging means is a judgment result indicating that the second camera shake state is present; ,
At the time of shooting, a first camera shake correction that causes the shooting unit to generate a shot image in which camera shake is corrected by relatively moving at least one of the optical elements constituting the shooting optical system and the imaging device. Means,
In response to the determination result that the camera shake level determination means is in the second camera shake state, relative shake is corrected for a plurality of captured images obtained by executing the second imaging mode. In this way, the image processing apparatus includes a second camera shake correction unit that generates a superimposed image in which camera shake is corrected by correcting and superimposing positions of the images.

  According to the photographing apparatus of the present invention, camera shake is corrected by the first camera shake correction means for performing optical camera shake correction in the first camera shake state, and electronic camera shake is in the second camera shake state. The camera shake is corrected by the second camera shake correcting means for performing the correction.

  Then, when the camera shake can be corrected by performing the optical camera shake correction with the first camera shake correction unit, the second camera shake correction unit does not need to perform electronic correction, and extra calculation is performed. As a result, the calculation time can be shortened.

  As a result, when the camera shake is corrected only by the first camera shake correction means, which is a light learning correction, it is possible to reliably perform shooting at a photo opportunity immediately after shooting.

  Further, when the first camera shake correction unit cannot correct the camera shake, the second camera shake correction unit corrects the camera shake electronically by calculation processing as necessary. At this time, the first camera shake correction means may be left operating.

Here, the photographing apparatus is a two-step shutter button that is half-pressed and fully pressed, and further includes a shutter button with a touch sensor that detects that a finger touches the shutter button,
The camera shake level determination means is in the first camera shake state based on a camera shake detection result between the timing when the finger touches the shutter button and the timing when the shutter button is half-pressed by the camera shake detection sensor. It is preferable to determine whether the camera is in the second camera shake state.

  Then, since the camera shake level is determined by the camera shake level determination unit immediately before shooting, the detection accuracy of whether the camera is in the first camera shake state or the second camera shake state is improved. In addition, power consumption is reduced by reducing the time for operating the camera shake detection sensor.

In order to obtain the same effect, the photographing apparatus includes a two-press shutter button that is half-pressed and fully pressed, and a finder that has an eyepiece sensor that detects that the eye is approaching,
Whether the camera shake level determination means is in the first camera shake state based on a camera shake detection result between the timing when the eye approaches the finder and the timing when the shutter button is half-pressed by the camera shake detection sensor. It may be determined whether the camera is in the second camera shake state.

  Further, it may be provided with a notification means for notifying the user of the determination result by the camera shake level determination means, and further obtained by the photographed image obtained by executing the first photographing mode and the second photographing mode. An aspect provided with recording means for recording information indicating whether the image is obtained in the first photographing mode or the second photographing mode in correspondence with the taken image. It is still better to be.

  As described above, it is possible to realize a photographing apparatus that increases the rate at which photographing can be performed immediately after the photographing.

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

  FIG. 1 is a diagram showing a digital camera which is an embodiment of a photographing apparatus of the present invention.

  FIG. 1 is a perspective view of a digital camera 100 according to an embodiment of the present invention. FIG. 1A shows a perspective view seen from above the front, and FIG. 1B shows a perspective view seen from above the back.

  As shown in FIG. 1A, a lens barrel 170 is provided at the center of the body of the digital camera 100 of this embodiment, and a viewfinder 105 is provided above the lens barrel 170. A shooting auxiliary light emission window 161 is provided on the side of the viewfinder 105.

  In addition, as shown in FIG. 1B, an operator group 101 for performing various operations when a user uses the digital camera 100 is provided on the back and top surfaces of the digital camera 100 of the present embodiment. Yes.

  In addition to the power switch 101a for operating the digital camera 100, the operator group 101 includes a cross key 101b, a menu / OK key 101c, a cancel key 101d, a mode lever 101e, and the like. Depending on the mode lever 101e in the operator group 101, switching between the reproduction mode and the photographing mode, and further switching between the moving image mode and the still image mode in the photographing mode are performed. When the power switch 101a is turned on while the mode lever 101e is switched to the shooting mode, a through image is displayed on the LCD panel 150, and the release button 102 is pressed at a photo opportunity while viewing the through image. The subject is shot. When the mode lever 101e is switched to the reproduction side, the already captured image is reproduced and displayed on the LCD panel 150.

  As will be described in detail later, a camera shake detection sensor for detecting camera shake and a camera shake correction unit are provided in the digital camera 100 shown in FIG. 1, and the camera shake correction unit performs shooting based on the detection result of the camera shake detection sensor. The camera shake is corrected.

  Note that the release button 102 provided in the digital camera 100 of the present embodiment has two operation modes of half-press and full-press, and both photometry and distance measurement are performed in the photographing apparatus at the timing when the button is half-pressed. The aperture and shutter speed are set according to the photometric value, and after the focus lens is placed at the focus position that matches the measured subject distance, the shutter time is set according to the full-press operation. The shutter is driven and exposure is performed by the image sensor. In addition, the shutter provided in the digital camera of the present embodiment has two shutters, a mechanical shutter and an electronic shutter provided in the imaging device. The mechanical shutter is used when the shutter speed is long, and the mechanical shutter cannot be driven. An electronic shutter is used when the shutter speed becomes shorter. However, since there is a risk of smearing in still image shooting, a mechanical shutter is used as much as possible. In the through image, a mechanical shutter may be used, but an electronic shutter is mainly used.

  FIG. 2 is a configuration block diagram of an electrical system inside the digital camera 100 of FIG.

  The internal configuration and operation of the digital camera 100 will be briefly described with reference to FIG.

  In the digital camera 100 of the present embodiment, all processing is centrally controlled by the main CPU 110. However, the main CPU 110 and the photometry / ranging CPU 120 are configured to execute processing in association with photographing processing such as photometry processing, distance measurement processing, and exposure processing.

  The configuration and the operation of each part will be described with reference to FIG.

  First, the configuration around the main CPU 110 will be described.

  The operation signal from the operator group 101 shown in FIG. 1B is supplied to the input unit of the main CPU 110. When at least one of these operation signals is supplied, processing corresponding to the operation signal is performed. It is executed by the main CPU 110 as appropriate. The main CPU 110 has an EEPROM 110a, and since a program necessary for operating as the digital camera 100 is written in the EEPROM 110a, first, the power switch 101a (see FIG. 1) in the operator group 101 is turned on. Then, the main CPU 110 starts processing for controlling the operation of the entire digital camera in accordance with the program procedure in the EEPROM 110a. Note that power is always supplied from the power source 130 to the main CPU 110 and the EEPROM 110a.

  Here, the operation of the digital camera 100 after the power switch 101a (see FIG. 1) in the operator group 101 is turned on will be described with reference to FIG.

  When the power switch 101a in the operator group 101 is turned on, the main CPU 110 detects that the power switch 101a is turned on, and power is supplied from the power supply 130 to each block such as the photometry / ranging CPU 120. When the mode lever 101e is switched to the photographing side when the power supply 130 is turned on, first, the subject image formed on the image sensor 112 is thinned out at predetermined intervals and output as an image signal. A subject image based on the output image signal is displayed on the LCD panel 150 of the image display LCD 15. A timing signal is supplied to the image pickup device 112 from a clock generator (hereinafter referred to as CG) 1121, and the image signal is thinned out and output at predetermined intervals by the timing signal. That is, the electronic shutter included in the image sensor 112 is driven by the CG 1121 and photographing for creating a through image is performed at predetermined intervals. A timing signal is output from the CG 1121 based on an instruction from the main CPU 110, and the timing signal is supplied to the white balance γ processing unit 113 and the A / D unit 114 in the subsequent stage in addition to the image sensor 112. ing. Therefore, the image pickup device 112, the white balance γ processing unit 113, and the A / D unit 114 perform the processing of the image signals in order in synchronization with the timing signal. It is assumed that the image sensor 112 of the present embodiment uses an image sensor capable of generating 300 frames per second as described in the conventional example.

  In this way, the image sensor 112, the white balance γ processing unit 113, and the A / D unit 114 perform processing of image signals in order in synchronization with the timing signal from the CG 1121, and the A / D unit 114 performs analog image signal processing. Is converted into a digital image signal, the image signal that has been subjected to white balance adjustment, gamma correction, and shooting sensitivity adjustment is supplied to the YC processing unit 116 at the subsequent stage. When the image signal is supplied from the A / D unit 114 to the YC processing unit 116, it is necessary to match the processing timings of both the A / D unit 114 and the YC processing unit 116. The RGB signal as the image signal is transferred to the YC processing unit 116 after adjusting the processing timing of the preceding stage (A / D unit 114 and the like) and the processing timing of the subsequent stage (YC processing unit 116). The YC processing unit 116 converts the RGB signal into a YC signal, and then the converted YC signal is supplied to the image display LCD 15 via the bus 121 and the Y signal is supplied to the main CPU 110.

  The image display LCD 15 to which the YC signal is supplied has a YC → RGB conversion unit 151 that converts the YC signal into an RGB signal. The YC → RGB conversion unit 151 converts the YC signal into an RGB signal again. The converted RGB signal is supplied to the driver 152, and the driver 152 displays a color image (subject image) based on the RGB signal on the LCD panel 150 of the image display LCD 15.

  In the main CPU 110 to which the Y signal is supplied, photometry is performed based on the Y signal, the photometric value is supplied to the photometry / ranging CPU 120, and the aperture diameter is continuously changed and set by the photometry / ranging CPU 120. The exposure necessary for obtaining a through image with appropriate brightness is adjusted by setting the shutter speed of the electronic shutter provided in the image sensor 112 and the like. Further, the main CPU 110 detects the contrast from the Y signal and continuously adjusts the focus. The focus position obtained by the focus adjustment is notified to the photometry / ranging CPU 120 and the focus is measured by the photometry / ranging CPU 120. The lens 1111 is also arranged at the in-focus position.

  The image sensor 112, the white balance γ processing unit 113, the A / D unit 114, the buffer memory 115, and the like operate in synchronization with the timing signal output from the CG 1121, and are generated by the image sensor 112 at predetermined intervals. Since the image signal is processed, the subject in the direction in which the photographing lens is directed is always displayed as the subject image on the display panel 150 of the image display LCD 15. When the release button 102 is pressed at a shutter chance while visually recognizing the displayed subject image, an electronic shutter is set in the image sensor 112 starting from the pressing timing of the release button 102, and subject light is emitted to the image sensor 112. After the image is formed and a predetermined shutter time elapses and the mechanical shutter is closed and driven, all image signals based on the subject light imaged on the image sensor 112 are output as RGB signals. The RGB signals are supplied to the YC processing unit 116 via the bus 121 under the control of the main CPU 110 and converted into YC signals by the YC processing unit 116. Further, the image signal of the YC signal is supplied to the compression / expansion unit 117 via the bus 121 and compressed by the compression / expansion unit 117, and the compressed image signal is recorded on the memory card 119 together with the header as an image file. . In the compression / decompression unit 117, the still image is compressed by a compression method based on the JPEG standard, and an image file is recorded on the memory card 119. Compression information, shooting information, and the like are written in the header of the image file. When the mode lever 101e of the digital camera 100 is switched to the playback side, the header of the file is first read from the memory card 119, After the compressed image signal in the file is decompressed by the compression / decompression unit 117 based on the compression information in the header and restored to the original, the image display LCD 15 side via the bus 121 under the control of the main CPU 110 And the subject image based on the image signal is displayed on the LCD panel 150.

  Here, the digital camera 100 of the present embodiment is provided with a camera shake correction unit 180. When a camera shake occurs at the time of shooting, the camera shake correction unit 180 detects the camera shake detected by the camera shake detection sensor 140. Camera shake is corrected. The image stabilization unit 180 includes an image stabilization control unit 181, an image stabilization driver 182 that operates in response to an instruction from the image stabilization control unit 181, an image stabilization lens 183 that is driven by the image stabilization driver 182, A lens position detection unit 184 that detects a lens position during movement of the camera shake correction lens 183 is provided, and is controlled under the control of the main CPU 110 according to the state of camera shake detected by the camera shake detection sensor 140. The camera shake correction unit 180 performs camera shake correction.

  Further, in the present embodiment, the main CPU 110 has a function of correcting blurring by performing image superimposition of images for each frame by addition processing. In this example, the camera shake detection result by the camera shake detection sensor 140 exceeds a predetermined value and cannot be corrected by the camera shake correction unit 180. In the second camera shake state according to the present invention, the camera shake correction unit is used. The camera shake is corrected by 180 and the image is added by the main CPU 110 to correct the camera shake. In other words, in this example, when the main CPU 110 determines that the level of camera shake exceeds a predetermined level, the light learning correction and the electronic camera shake correction described in the conventional example are used in combination and are equal to or less than a predetermined value. If it is determined, the light is learned and correction is performed.

  In the present embodiment, an example of the camera shake level determination unit according to the present invention is configured by the main CPU 110, and an example of the first camera shake correction unit according to the present invention is configured by the main CPU 110 and the camera shake correction unit 180. An example of the second blur correction means is composed of the main CPU 110, the photometry / ranging CPU 120, and the CG 1121.

  Here, the main CPU 110 and the photometry / ranging CPU 120 perform the photographing process, and the processing contents of the optical blur correction performed by the camera shake correction unit 180 based on the instruction of the main CPU 110 during the photographing process and the main CPU 110 itself perform. The processing contents of electronic blur correction will be described.

  First, the photographing process will be described.

  FIG. 3A is a flowchart showing the procedure of the photographing process executed jointly by the main CPU 110 and the photometry / ranging CPU 120. The process of the flow in FIG. 3A is started when the shutter button 102 is half-pressed.

  When the shutter button 102 is half-pressed, an AE process (a process for adjusting exposure by adjusting a diaphragm or the like according to a photometric result) is executed in step S301, and an AF process (focus lens is focused) in the next step S302. Execute processing to arrange at the position.

  In the next step, exposure is started, and when a predetermined shutter time elapses, the mechanical shutter is closed to complete the exposure (step S303). Proceeding to the next step S304, the CG 1121 is instructed in step S304, a read signal is supplied to the image sensor 112, and an image signal is output from the image sensor 112.

  In the next step S305, the CG 1121 is instructed to supply the timing signal to the A / D unit 114, thereby causing the A / D unit 114 to perform A / D conversion in synchronization with the timing signal. In step S306, the image signal converted into the digital signal is supplied from the buffer memory 115 to the YC processing unit 116 via the bus 121, and causes the YC processing unit 116 to start signal processing. When the signal processing in the YC processing unit 116 is completed, in the next step S307, the image signal for one frame is supplied to the compression / decompression unit 117 via the bus and the compression / decompression unit 117 performs the compression process. Then, the compressed image signal is recorded in the memory card 119, and the processing of this flow is finished.

  Here, details of the exposure processing in step S303 will be described with reference to FIG.

  FIG. 3B is a flowchart showing details of the exposure step S303 shown in FIG.

  Through the processing of this flow, the main CPU 110 performs shooting processing as well as camera shake correction processing based on the camera shake detection result until the shutter button 102 is half-pressed by the camera shake detection sensor 140 based on the cooperation of the photometry / ranging CPU 120. To run. In addition, the code | symbol S1 in a figure shows half press.

  First, in step S3031, it is determined whether or not the camera shake angle detected by the camera shake detection sensor 140 exceeds a predetermined angle (0.5 degrees) before being half-pressed. If it is determined in step S3031 that the angle exceeds the predetermined angle (0.5 degrees), the process proceeds to step S3033 as the second camera shake state according to the present invention, and the clock generator 1121 is instructed to 1 / A plurality of continuous images are captured at a shutter speed of f. The shooting process in step S3033 is the second shooting mode process according to the present invention. Further, the process proceeds to step S3034. In step S3034, a process of adding a plurality of images obtained in step S3033 is performed. When the exposure ends in step S3036, the mechanical shutter is closed and driven in step S3037, and the process of this flow ends.

  If it is determined in step S3031 that the camera shake angle detected by the camera shake detection sensor 140 is equal to or smaller than a predetermined angle (0.5 degrees), the process proceeds to step S3032, and in step S3032, this time the frequency of camera shake is detected. Is determined to exceed a predetermined frequency (20 Hz).

  If it is determined in step S3032 that the camera shake frequency exceeds the predetermined frequency (20 Hz), the process proceeds to step S3033 as the second camera shake state, and the processing from step S3033 to step S3037 is executed. If it is determined in step S3032 that the camera shake frequency is equal to or lower than the predetermined frequency, the imaging device 120 is instructed to the CG 1121 while the camera shake correction unit 180 corrects camera shake in step S3035, assuming that the first camera shake state is present. In addition, a shutter speed that is two steps slower than 1 / f is set, and the shooting sensitivity corresponding to the shutter speed is set in the white balance γ processing unit 113 to perform single shooting. The shooting process in step S3035 is the first shooting mode according to the present invention. When exposure is completed in step S3036, the mechanical shutter is closed and driven in step S3037, and the processing of this flow is completed.

  In other words, in the present embodiment, an example of the photographing unit referred to in the present invention includes the main CPU 110, the photometry / ranging CPU 120, and the CG 1121.

  Thus, based on the determination result of the main CPU 110 that constitutes an example of the level determination unit according to the present invention, the first camera shake correction unit 180 is configured to correct camera shake, and only when a predetermined level is exceeded. When the main CPU 110 that constitutes an example of the second camera shake correction unit 180 is configured to correct camera shake, when it is possible to perform camera shake correction only by light learning correction, the calculation time is shortened compared to the conventional art. It becomes possible to take a picture at a photo opportunity immediately after taking a picture.

  In other words, an imaging apparatus is realized that increases the rate at which imaging can be performed on a photo opportunity immediately after imaging.

  Here, in the first embodiment, the example in which the camera shake correction is performed based on the detection result of the camera shake detection sensor 140 from the time when the power is turned on until the timing when the shutter button 102 is half-pressed is shown. If the state is detected from the time the power is turned on until it is half-pressed, useless processing increases, the accuracy of camera shake detection decreases, and power consumption increases.

  Therefore, for example, assuming that a touch sensor is mounted on the shutter button 102 and shooting is to be performed when the photographer touches the shutter button, a configuration in which only a shake state immediately before shooting is detected can detect blur. In addition to being increased, the processing is performed more efficiently than in the first embodiment, and the power consumption is reduced.

  4 and 5 are diagrams for explaining the second embodiment in which the processing efficiency is improved as compared with the first embodiment.

  The configuration of FIG. 4 is the same as that of FIG. 2 except that the shutter button 102 is changed to a shutter button 102A with a touch sensor (here, electrostatic sensor 1021).

  Further, the processing in FIG. 5 is based on the camera shake detection result from the timing at which the processing at step S3031 and step S3032 in FIG. 3B touches the shutter button 102 to the timing at which the shutter button 102 is half-pressed. Except for the change to (S3031A, S3032A), the process is the same as the process of FIG.

  As shown in FIG. 4, when the shutter button 102A with an electrostatic sensor is provided, the main CPU 110 can detect the shake state of the photographing apparatus immediately before photographing. Shortening can be achieved.

  As described above, when the shake state immediately before and during the shooting is detected as in the second embodiment, the rate at which shooting can be performed reliably in the photo opportunity of the first embodiment is increased. In addition to this, it is possible to obtain an effect that the blur detection accuracy is improved and the power consumption is reduced as compared with the first embodiment.

  Here, when photographing, the photographer may not only touch the shutter button 102 but also peek through the viewfinder 105 to perform framing.

  6 and 7 are diagrams for explaining the third embodiment.

  The configuration in FIG. 6 is the same as the configuration in FIG. 2 except that an eyepiece sensor 1051 for detecting that the eye is approaching is added to the eyepiece portion of the finder 105 shown in FIG. Also, the processing in steps S3031 and S3032 in FIG. 3 is changed to processing (S3031B, S3032B) based on the camera shake detection result from the timing when the eye approaches the viewfinder to the timing when the shutter button is half-pressed. Except for the above, the processing is exactly the same as the processing of FIG.

  6 and 7, in the same way as the second embodiment, in addition to the effect of increasing the rate at which shooting can be performed reliably in the photo opportunity of the first embodiment, the detection accuracy of the blur is also increased. It is possible to increase the power consumption while reducing the power consumption.

  In the present embodiment, the camera shake correction unit that is the first camera shake correction unit is always operated, and when a camera shake exceeding a certain value occurs, the CPU 110 that constitutes the second camera shake correction unit performs image addition. Although the camera shake correction is performed, the present invention does not depend on this, but the second camera shake correction unit corrects the camera shake when the predetermined value is exceeded, and the camera shake correction unit 180 performs the camera shake when the predetermined value is not exceeded. The first blur correction unit and the second blur correction unit may be switched according to the blur amount.

  By the way, when the user is notified by a display whether the camera shake correction is an electronic camera shake correction or an optical camera shake correction, since the user has performed the electronic camera shake correction at the time of the last shooting, for example, the shutter immediately thereafter You can know that you couldn't take a picture at the chance.

  FIGS. 8 and 9 are diagrams for explaining processing in a case where the user is notified of which of the optical camera shake correction and the electronic camera shake correction has been performed.

  The processing is the same as that in FIG. 3 except that the display processing in steps S3032A and S3032B is added.

  When the main CPU 110 and the photometry / ranging CPU 120 cooperate to execute a photographing process, an optical image stabilization (or electronic image stabilization) is displayed on the LCD panel 150 as shown in FIG.

  When displayed on the LCD panel in this way, the user can know the reason why the user could not take a picture when the next picture was taken following the previous picture.

  Further, when which camera shake correction was performed at the time of shooting is displayed on the LCD panel, the user can analyze an image defect while checking the situation at the time of shooting.

  FIG. 10 shows whether the captured image obtained by executing the first imaging mode and the captured image obtained by executing the second imaging mode are images acquired by the first imaging mode or the second image. It is a figure explaining the process which added the process which records the information showing whether it is the image acquired by imaging | photography mode.

  The process in FIG. 10 is exactly the same as the process in FIGS. 3A and 3B except that step S309 is added. FIG. 11 is a diagram showing a memory allocation indicating a place where information is recorded in the image file in the process of step S309.

  When the process of step S309 of FIG. 10 is executed, information is recorded in the tag area of FIG. 11, and information based on the information is displayed on the LCD panel during reproduction. Then, the user can analyze the cause of the image defect by looking at the information on the LCD panel.

It is a figure which shows the digital camera which is one Embodiment of the imaging device of this invention. FIG. 2 is a configuration block diagram of an electrical system inside the digital camera 100 of FIG. 1. 4 is a flowchart showing a procedure of photographing processing executed jointly by both the main CPU 110 and the photometry / ranging CPU 120. It is a flowchart which shows the detail of step S303 of exposure shown to Fig.3 (a). It is a figure explaining 2nd Embodiment in which the efficiency improvement of the process was achieved rather than 1st Embodiment. It is a figure explaining 2nd Embodiment in which the efficiency improvement of the process was achieved rather than 1st Embodiment. It is a figure explaining 3rd Embodiment. It is a figure explaining 3rd Embodiment. It is a figure explaining the process at the time of making it a structure which notifies a user that camera shake correction was performed by either of optical camera shake correction and electronic camera shake correction. It is a figure explaining the process at the time of making it a structure which notifies a user that camera shake correction was performed by either of optical camera shake correction and electronic camera shake correction. Corresponding to the photographed image obtained by execution of the first photographing mode and the photographed image obtained by the second photographing mode, the image is obtained by the first photographing mode or obtained by the second photographing mode. It is a figure explaining the process which added the process which records the information showing whether it is a given image. It is a figure which shows the memory allocation which shows the place where information is recorded in an image file by the process of step S309.

Explanation of symbols

100 Digital Camera 101 Control Group 102 102A Shutter Button 105 Viewfinder 110 Main CPU
110a EEPROM
112 CCD solid-state imaging device 113 White balance γ processing unit 114 A / D unit 115 Buffer memory 116 YC processing unit 117 Compression / decompression unit 118 I / F
119 Memory card 120 Metering / ranging CPU
150 LCD panel 140 Camera shake detection sensor 180 Camera shake correction means 181 Camera shake correction control unit 182 Camera shake correction driver 183 Camera shake correction lens 184 Lens position detection unit

Claims (5)

In a photographing apparatus that forms an image of a subject on an image sensor with a photographing optical system and generates an image representing the subject,
A camera shake detection sensor for detecting camera shake;
A camera shake level determination means for determining whether a camera shake detection result before photographing by the camera shake detection sensor is in a first camera shake state in which the result is equal to or lower than a predetermined level or in a second camera shake state in which the predetermined level is exceeded;
When the determination result by the camera shake level determination means is a determination result that the first camera shake state is present, shooting is performed in the first shooting mode that generates a single shot image at the time of shooting. Photographing means for executing photographing in a second photographing mode for generating a plurality of continuous photographed images when the judgment result by the camera shake level judging means is a judgment result that the second camera shake state is present; ,
At the time of shooting, a first camera shake correction that causes the shooting unit to generate a shot image in which camera shake is corrected by relatively moving at least one of the optical elements constituting the shooting optical system and the imaging device. Means,
In response to the determination result that the camera shake level determination means is in the second camera shake state, relative shake is corrected for a plurality of captured images obtained by executing the second imaging mode. An image capturing apparatus comprising: a second camera shake correction unit that generates a superimposed image in which camera shake is corrected by correcting and superimposing positions of images as described above. The photographing apparatus is a two-step pressed shutter button consisting of half-press and full-press, and further includes a shutter button with a touch sensor that detects that a finger touches the shutter button,
The camera shake level determination means is in the first camera shake state based on a camera shake detection result between a timing at which a finger touches the shutter button and a timing at which the shutter button is half-pressed by the camera shake detection sensor. 2. The photographing apparatus according to claim 1, wherein the photographing apparatus is configured to determine whether the camera is in the second camera shake state. The photographing apparatus includes a two-step shutter button that is half-pressed and fully-pressed, and a finder that has an eye sensor that detects that the eye is approaching,
Whether the camera shake level determination means is in the first camera shake state based on a camera shake detection result between the timing when the eye approaches the finder and the timing when the shutter button is half-pressed by the camera shake detection sensor. The photographing apparatus according to claim 1, wherein the photographing apparatus is configured to determine whether the second camera shake state is present.   The photographing apparatus according to claim 1, further comprising a notification unit that notifies a user of a determination result by the hand movement level determination unit. Corresponding to the photographed image obtained by execution of the first photographing mode and the photographed image obtained by the second photographing mode, the image is obtained by the first photographing mode or the second photographing mode. 2. The photographing apparatus according to claim 1, further comprising recording means for recording information indicating whether the image is obtained in the photographing mode.

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