JP2005064699A - Camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a camera which provides an effect of a hand shake correction function under all photograph conditions without raising manufacture cost of a whole device and enables a user to confirm the effect of hand shake correction. <P>SOLUTION: The camera is provided with a photo-optical system 11, an imaging device 12 receiving luminous flux made incident through the photo-optical system 11 and outputting image data, an actuator 21 for obtaining image data where influence of hand shake is reduced by controlling a position of the imaging device 12, a monitor 24 displaying photographed image data and a hand shake detection part 19 detecting a hand shake state of the camera. When the actuator 21 is operated and influence of hand shake is reduced, an image at that time, an image when the actuator 21 is not operated and image blurring levels in the respective images are displayed on the monitor 24. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a camera, and more particularly to a camera having a function of preventing camera shake.

  In general, camera shake is more likely to occur as the focal length of the photographic lens increases, and as the shutter speed decreases and the exposure time increases. Various cameras having a camera shake correction function for preventing such camera shake have been proposed.

  For example, Patent Documents 1 and 2 propose a camera that drives a part of a photographing optical system to prevent camera shake. FIG. 18 is a block diagram showing a typical configuration of such a camera. This camera includes a photographing optical system 200, a camera shake correction unit 201, an image sensor 202, a finder optical system 203, and a movable mirror mechanism 204.

  That is, when the light beam incident through the imaging optical system 200 is guided to the image sensor 202 side, the camera shake correction unit 201 provided in the imaging optical system 200 performs camera shake correction. As a result, the light beam incident via the photographing optical system 200 is always a light beam that has undergone camera shake correction. In this case, the effect of camera shake correction can be confirmed by the finder optical system 203. In such confirmation, the movable mirror mechanism 204 is set to a position indicated by reference numeral 205. On the other hand, when the light beam incident through the photographing optical system 200 is incident on the image sensor 202, the movable mirror mechanism 205 is retracted to a position indicated by reference numeral 206.

  In addition, a method of providing a camera shake correction unit on the camera body side without providing a camera shake correction unit on the imaging optical system side, that is, a method of performing camera shake correction by moving the image sensor in a plane orthogonal to the imaging optical axis, It is proposed in Document 3 and Patent Document 4. FIG. 19 is a block diagram showing a typical configuration of such a camera. In other words, this camera performs camera shake correction by driving the camera shake correction unit 207 and moving the image sensor 202 in a plane orthogonal to the photographing optical axis. In such a camera, it is possible to perform camera shake correction without providing a camera shake correction unit on the photographing optical system side, and the cost of the entire system is lower than when a camera shake correction unit is provided in the shooting optical system. Become.

Further, as proposed in Japanese Patent Application Laid-Open No. H10-228707, there is a technique that observes a subject by using an electronic viewfinder (Electric View Finder: EVF) as shown in FIG. 20 instead of the viewfinder optical system 203. In such a configuration, since the image is displayed on the EVF 208 based on the image signal output from the image sensor 202, the effect of camera shake correction can be confirmed on the EVF 208.
JP-A-6-118492 JP-A-6-250272 JP-A-8-223471 JP-A-5-22649 JP-A-6-46322

  However, in the method of providing the camera shake correction unit on the photographic optical system side, the benefits of the camera shake correction function can be used only when an interchangeable lens having a camera shake correction function is used. Therefore, in order to take a beautiful photograph free of camera shake in any shooting state, it is necessary to provide a camera shake correction unit on various interchangeable lenses, which increases the cost of the entire system.

  In addition, in the method of providing the camera shake correction unit on the image sensor side, the effect of camera shake correction cannot be confirmed by the finder optical system. Such a problem also occurs in a twin-lens type camera having a finder 209 in an optical system different from the photographing optical system as shown in FIG.

  Furthermore, the EVF cannot observe a high-quality finder image as compared with the optical finder, and consumes much power.

  The present invention has been made in view of the above circumstances, and the effect of the camera shake correction function can be obtained under any shooting conditions without increasing the manufacturing cost of the entire apparatus, and the effect of the camera shake correction by the user can be obtained. An object is to provide a camera that can be confirmed.

  In order to achieve the above object, a camera according to a first aspect of the present invention includes a photographing optical system, an imaging element that receives light flux incident through the photographing optical system and outputs image data, and the imaging element. A camera shake correction unit that obtains first image data in which the influence of camera shake is reduced by performing position control of the image sensor or processing image data from the image sensor, a monitor that displays the captured image data, A camera shake detection unit that detects a camera shake state of the camera, and a second case where the camera shake correction unit is not operated based on the first image data and the camera shake state detected by the camera shake detection unit. A first image blur level generated when the image forming unit for processing and forming the image data, and the camera shake correcting unit are operated, and a second image blur level generated when the camera shake correcting unit is not operated. And the first image data and the second image data are displayed on the monitor, and the first image data and the second image data are associated with each other. And a monitor control unit that controls the blur level and the second image blur level to be displayed on the monitor.

  According to the first aspect, the image blur level associated with the first image data when the camera shake correction unit is operated and the image associated with the second image data when the camera shake correction unit is not operated. Since the blur level is displayed on the monitor, the effects of camera shake correction are easier to understand.

  In order to achieve the above object, a camera according to a second aspect of the present invention includes a photographing optical system, an imaging element that receives a light beam incident through the photographing optical system and outputs image data, and photographing. A viewfinder for observing a subject to be corrected, and camera shake correction for obtaining first image data with reduced influence of camera shake by controlling the position of the image sensor or processing image data from the image sensor On the basis of a camera shake state detected by the first image data and the camera shake detection unit, a monitor that displays the captured image data, a camera shake detection unit that detects a camera shake state of the camera, A processing forming unit that processes and forms second image data when the camera shake correction unit is not operated, a first image blur level that is generated when the camera shake correction unit is operated, and the camera shake correction. A blur level generator for generating a second image blur level generated when the first image data is not operated, and the first image data and the second image data are displayed on the monitor, and the first image data and A monitor control unit that controls the first image blur level and the second image blur level to be displayed on the monitor in association with the second image data.

  According to the second aspect, the effect of camera shake correction can be confirmed even if the optical viewfinder is provided.

  In order to achieve the above object, a camera according to a third aspect of the present invention includes a photographing optical system, an imaging element that receives light flux incident through the photographing optical system and outputs image data, and A camera shake correction unit that obtains image data with reduced influence of camera shake by performing position control of the image sensor or processing image data from the image sensor, a monitor that displays the captured image data, A camera shake detection unit that detects the camera shake state of the camera, an image blur level of image data that is generated when the camera shake correction unit is operated, and image data that is generated when the camera shake correction unit is not operated. An image blur level generating unit that generates an image blur level and an image blur level of image data generated when the camera shake correcting unit is operated and the camera shake correcting unit are not operated. An image Burereberu image data generated if you and a monitor control unit that controls to display on the monitor.

  According to the third aspect, since the image blur level is displayed on the monitor, the effect of camera shake correction is more easily understood.

  In order to achieve the above object, a camera according to a fourth aspect of the present invention includes a photographing optical system, an imaging element that receives light flux incident through the photographing optical system and outputs image data, and A camera shake correction unit that obtains image data with reduced influence of camera shake by performing position control of the image sensor or processing image data from the image sensor, a monitor that displays the captured image data, A camera shake detection unit that detects a camera shake state, a camera shake level generation unit that generates an image blur level of image data that is generated when the camera shake correction unit is not operated, and the image blur level is displayed on the monitor. And a monitor control unit that performs control so as to be performed.

  According to the fourth aspect, since the image blur level is displayed on the monitor, the effect of the camera shake correction is easier to understand.

  In order to achieve the above object, a camera according to a fifth aspect of the present invention includes a photographing optical system, an imaging element that receives light flux incident through the photographing optical system and outputs image data, and A camera shake correction unit that obtains image data with reduced influence of camera shake by performing position control of the image sensor or processing image data from the image sensor, and a camera shake that detects a camera shake state of the camera. A detection unit, a recording unit that records captured image data, an image blur level of image data that is generated when the camera shake correction unit is operated, and image data that is generated when the camera shake correction unit is not operated The image blur level generating unit for generating the image blur level and the image blur level of the image data generated when the camera shake correcting unit is operated and the camera shake correcting unit are not operated. An image Burereberu image data generated if comprising a recording control unit that controls to record into the recording unit.

  According to the fifth aspect, by recording the image blur level in the recording unit, the image blur level can be displayed on the display member other than the monitor.

  In order to achieve the above object, a camera according to a sixth aspect of the present invention includes a photographing optical system, an imaging element that receives light flux incident through the photographing optical system and outputs image data, and A camera shake correction unit that obtains image data with reduced influence of camera shake by performing position control of the image sensor or processing image data from the image sensor, and a camera shake that detects a camera shake state of the camera. A detection unit, a recording unit that records captured image data, a blur level generation unit that generates an image blur level of image data that is generated when the camera shake correction unit is not operated, and the camera shake correction unit is operated. And a recording control unit that controls to record the image blur level of the image data generated in the absence of the recording in the recording unit.

  According to the sixth aspect, the image blur level can be displayed on the display member other than the monitor by recording the image blur level in the recording unit.

  In order to achieve the above object, according to the camera of the seventh aspect of the present invention, in the first to sixth aspects, the camera shake detection unit is a vibration detection sensor that detects a vibration state of the camera. is there.

  In order to achieve the above object, in the camera according to the eighth aspect of the present invention, in the seventh aspect, the vibration detection sensor is an angular velocity sensor or an acceleration sensor.

  According to these seventh and eighth aspects, the camera shake state can be detected by the vibration detection sensor that detects the vibration of the camera.

  In order to achieve the above object, in a camera according to a ninth aspect of the present invention, in the first to sixth aspects, detection of the camera shake state by the camera shake detection unit is obtained from the image sensor. This is performed based on the obtained image data.

  In order to achieve the above object, in the camera according to the tenth aspect of the present invention, in the ninth aspect, the image data includes at least two images obtained by the image sensor at different timings. It is data.

  According to these ninth and tenth aspects, the camera shake state can be detected based on the image data obtained by the image sensor.

  In order to achieve the above object, in the camera according to the eleventh aspect of the present invention, in the first to fourth aspects, the display of the image blur level by the monitor control unit is the magnitude of the detected image blur level. It is performed by analog display according to

  In order to achieve the above object, according to a twelfth aspect of the present invention, in the camera according to the eleventh aspect, the analog display corresponding to the magnitude of the detected image blur level is a blur locus of the image data. Corresponding display.

  According to these eleventh and twelfth aspects, the image blur level can be displayed by analog display according to the detected image blur level.

  In order to achieve the above object, in a camera according to a thirteenth aspect of the present invention, in the first to fourth aspects, the display of the image blur level by the monitor control unit is the magnitude of the detected image blur level. Is represented by character display.

  According to the thirteenth aspect, the image blur level can be displayed by displaying the detected image blur level as characters.

  According to the present invention, it is possible to provide a camera capable of obtaining the effect of the camera shake correction function under any shooting conditions without increasing the manufacturing cost of the entire apparatus and allowing the user to check the effect of the camera shake correction. can do.

  The present invention acquires image data with reduced effects of camera shake by performing position control of the image sensor or processing image data from the image sensor, and is in a state in which the effect of camera shake is not reduced. Image data is also acquired by detecting the camera shake state. Then, by displaying these two acquired image data on the monitor, it is possible to confirm whether or not there is an effect of camera shake correction even with a camera having an optical viewfinder. That is, even if the camera has an optical viewfinder, when the camera shake correction function is operated, the image data at that time is displayed on the monitor. Further, the image blur magnitude (image blur level) generated by the two image data at this time is detected and displayed on the monitor.

  Without such confirmation technology, the user cannot experience the added value of a camera with a function for correcting camera shake. In addition, the manufacturer may not be able to correctly recognize the surplus technology by compensating for the disadvantages such as cost and space necessary for camera shake correction, and the direction of the technology evolution may be stopped.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a block diagram illustrating a conceptual configuration of a camera according to Embodiment 1 of the present invention. That is, as shown in FIG. 1, the camera of the first embodiment includes a photographing optical system 11, a main imaging device (imaging device described in claims) 12, and an AD conversion unit 13 (the AD unit 13 in FIG. 1). The image signal processing unit 14, the recording unit 15, the light receiving lens 16, the sub imaging device 17, the AD conversion unit 18, the camera shake detection unit 19, the lens information recording unit 20, and the imaging device. A driving actuator (camera shake correction unit, hereinafter referred to as an actuator) 21, a processing forming unit 22, a monitor control unit 23, a monitor 24, and an arithmetic control unit 25 are configured.

  The photographing optical system 11 is composed of a plurality of optical lenses and the like, collects a reflected light beam from the subject, and forms a subject image on the main imaging device 12. The main image sensor 12 performs a photoelectric conversion process or the like on a subject image incident through the photographing optical system 11 to generate an image signal. The AD conversion unit 13 converts an analog image signal generated and output by the main imaging element 12 into a digital image signal of a predetermined format and outputs the digital image signal to the image signal processing unit 14.

  The image signal processing unit 14 performs predetermined image processing on the digital image signal converted by the AD conversion unit 13, for example, color correction, gradation correction, and γ (gamma) correction of an image to be represented by the image data. Make adjustments. The recording unit 15 includes various media that record image data in a predetermined form and the driving unit thereof, and records the image data generated by the image signal processing unit 14. The image signal processing unit 14 also outputs the generated image data to the processing and forming unit 22.

  In addition, the reflected light beam from the subject is condensed by the light receiving lens 16 and forms an image on the sub imaging element 17. The sub image sensor 17 performs photoelectric conversion processing or the like on the imaged subject image to generate an image signal, and then outputs the image signal to the AD converter 18. The AD conversion unit 18 converts the input image signal into a digital signal, and then outputs the digital signal to the camera shake detection unit 19.

  The camera shake detection unit 19 includes a plurality of image memories 19a (only three are shown in the figure), a comparison unit 19b, a movement direction calculation unit 19c, and a movement amount calculation unit 19d. That is, the image signal input from the AD conversion unit 18 is sequentially recorded in the image memory 19 a in the camera shake detection unit 19. This recording is repeated during exposure of the main image sensor 12, and as a result, an image signal as shown in FIG. 2 is recorded in the image memory 19a. However, since the sub-imaging element 17 does not capture an image with a sufficient exposure time, the obtained image signal has many noise components, and the image quality is inferior to the image signal acquired by the main imaging element 12. However, since it is possible to determine how the image has moved, the image signals recorded in these image memories can be compared in the comparison unit 19b.

  Based on the comparison result in the comparison unit 19b, the movement direction calculation unit 19c determines the movement direction of the main imaging element 12. Further, the movement amount calculation unit 19d calculates the movement amount of the main image sensor 12 from the comparison result in the comparison unit 19b and the lens information recorded in the lens information recording unit 20. Here, the lens information recorded in the lens information recording unit 20 is focal length information of the lenses constituting the photographing optical system 11. That is, when the lens constituting the photographic optical system 11 is a telephoto lens having a long focal length, the amount of movement of the main image sensor 12 is large because the amount of camera shake is large. On the other hand, in the case of a wide-angle lens with a short focal length, the amount of movement of the main image sensor 12 is small because the amount of camera shake is small.

  After calculating the moving direction and moving amount of the main image sensor 12 in this way, the camera shake detection unit 19 controls the actuator 21 to move the main image sensor 12 to reduce the influence of camera shake. That is, even when camera shake occurs during exposure, the main image sensor 12 is moved according to the generated camera shake, so that the light incident on each pixel of the main image sensor 12 is the same before and after the occurrence of camera shake. . As a result, the image signal acquired by the main image sensor 12 is an image signal in a state where the influence of camera shake is reduced.

  In addition, the movement amount calculation unit 19 d in the camera shake detection unit 19 outputs the calculation result to the process forming unit 22.

  The processing forming unit 22 processes the image data based on the image data input from the image signal processing unit 14 and the calculation result in the camera shake detection unit 19, and then outputs the processed image data to the monitor control unit 23. The monitor control unit 23 displays an image on a monitor 24 composed of, for example, an LCD (Liquid Crystal Display) based on the image data input from the processing forming unit 22.

  The above control is integratedly controlled by an arithmetic control unit 25 configured by, for example, a one-chip microcontroller such as a CPU (Central Processing Unit).

  Next, shooting control including a camera shake correction function in the camera of the first embodiment will be described in more detail. Here, this control is performed by a microcontroller (not shown) inside the arithmetic control unit 25 and the camera shake detection unit 19 according to a flowchart as shown in FIG.

First, the camera shake detection unit 19 starts reading the lens information recorded in the lens information recording unit 20 (step S1). Then, to start the hand shake detection by initiating image capture signal using the sub image pickup device 17 (step S2), and is recorded in the image memory 19a as an image signal I ₀ of the reference image signal taken ( Step S3).

Thereafter, exposure is started (step S4). Then, the image signal I ₁ is captured again using the sub-image sensor 17 (step S5), and the captured image signal I ₁ is compared with the reference image signal I ₀ recorded in the image memory 19a in step S3. The camera shake direction and the camera shake amount are calculated (step S6). Next, the movement direction and movement amount of the main image sensor 12 are determined based on the detected camera shake direction and camera shake amount (step S7), and the actuator 21 is driven according to these results to move the main image sensor 12. (Step S8).

  Next, the arithmetic control unit 25 determines whether or not to end the exposure (step S9). This is determined by whether or not a predetermined exposure time has elapsed. If it is determined in step S9 that the exposure is not yet finished, the process returns to step S5. That is, the control in steps S5 to S9 is repeatedly performed until the exposure is completed.

FIG. 4 is a timing chart in the control of step S3 to step S9. First, the reference image signal I ₀ is captured and recorded in the image memory (image memory 0) before the exposure starts. After exposure start, after the image signal I ₁ is recorded in the image memory (image memory 1-4) every time Delta] t, the reference image signal I ₀ shake direction and shake amount is performed compared with is calculated The Based on the calculation result, the position of the main image sensor 12 is controlled.

Here, the calculation of the camera shake direction and the camera shake amount by comparing the image signals will be described with reference to FIG. Although there are camera shake in the x direction and camera shake in the y direction, only the camera shake in the x direction is shown here for simplicity. That is, the shift direction and the shift amount (x _{1 to} x ₃ ) of the image signal I ₁ with respect to the reference image signal I ₀ are detected to calculate the shake direction and the shake amount. Then, the influence of camera shake is reduced by controlling the actuator 21 based on the calculation result to move the main image sensor 12.

  If there is camera shake in the y direction, the camera shake direction and the camera shake amount in the y direction are calculated in the same manner as in the x direction, and the main image sensor 12 is moved in the y direction based on the calculation result. It is only necessary to move to.

  Next, when it is determined in step S9 that the exposure is to be ended, the arithmetic control unit 25 ends the exposure by controlling a shutter (not shown) or the like (step S10), and starts reading the image signal and reads it. The image signal is digitized by the AD converter 13 (step S11). Then, after predetermined image processing is performed by the image signal processing unit 14 (step S12), image data is recorded in the recording unit 15 (step S13). Thereafter, the arithmetic control unit 25 controls the monitor control unit 23 to display the image recorded in the recording unit 15 on the monitor 24 (step S14).

  This image is an image when the camera shake correction function is operated. In the first embodiment, the following determination is performed in order to make the user understand the effect of the camera shake correction function more. That is, the arithmetic control unit 25 determines whether to display an image when the camera shake correction function is not operated (step S15). This determination may be performed by determining a switch operation state (not shown) of the user. If it is determined in this determination that image display is not performed, the control of this flowchart is terminated. On the other hand, in the determination in step S15, display processing that will be described in detail later is performed (step 16). As a result of this display processing, for example, image display as indicated by reference numerals 24a and 24b in FIG. 5 is performed.

FIG. 6 is a block diagram when the technique of the first embodiment is applied to a general digital camera.
That is, the camera shown in FIG. 6 photoelectrically converts an object image formed by the photographing optical system using an image sensor such as a CCD, and an electrical signal (image signal) obtained by the photoelectric conversion is predetermined. In a predetermined form. Here, in the example of FIG. 6, a so-called compact type electronic camera in which the configuration between the photographing optical system and the image sensor is relatively simple will be described as an example.

  Here, some cameras having a camera shake correction function reduce the influence of camera shake by moving the photographing optical system 11, but in such a system, when a specific lens is used. However, the effects of camera shake can only be corrected. For this reason, the example of FIG. 6 also employs a method of correcting the camera shake by moving the image sensor 12 (hereinafter, the main image sensor is simply referred to as an image sensor).

In the following description, only the parts different from FIG. 1 will be described, and the same parts as those in FIG.
In FIG. 6, the image signal processing unit 14 is illustrated including the processing forming unit 22 of FIG. Further, the image signal processing unit 14 outputs a digital image signal subjected to image processing to the contrast detection unit 26. The contrast detection unit 26 detects the contrast signal of the subject from the output of the image signal processing unit 14 and outputs it to the calculation control unit 25.

  The arithmetic control unit 25 moves the photographing optical system 11 in the direction along the optical axis via the lens driving unit 27 while determining the contrast signal detected by the contrast detection unit 26. The arithmetic control unit 25 detects the position of the photographing optical system 11 with the lens position detection unit 28, and determines the camera based on the relationship between the in-focus position of the photographing optical system 11 and the lens position detected by the lens position detection unit 28. A distance L from 1 to the subject 110 (hereinafter referred to as subject distance L) is calculated.

  Further, when the camera 1 has a distance measuring unit 29 as shown in FIG. 6, from the camera 1 to the subject 110 based on the subject image incident through the optical system different from the photographing optical system 11. The distance L can be obtained.

That is, the subject image incident through the pair of light receiving lenses 30a and 30b in the distance measuring unit 29 is formed on the pair of sensor arrays 31a and 31b. The outputs of the pair of sensor arrays 31 a and 31 b are digitized by the AD conversion unit 32 and then output to the arithmetic control unit 25. The arithmetic control unit 25 compares the two image signals input from the AD conversion unit 32 and calculates the triangulation distance from the relative position difference x between the detection positions of the two image signals, the lens parallax B, and the focal length f. The principle, ie
L = Bf / x
The subject distance L is calculated based on the above. Based on the subject distance L, focus control for autofocus and light amount control of the flash unit 33 can be performed. Based on this, the arithmetic control unit 25 controls the strobe control unit 34 to control the strobe unit 33 to emit auxiliary illumination light.

  In FIG. 6, a vibration detection sensor 35 and an image sensor movement control unit 36 are provided instead of the camera shake detection unit 19. The vibration detection sensor 35 includes, for example, a well-known angular velocity sensor, an acceleration sensor, or the like, and detects the vibration amount of the camera 1, that is, the camera shake amount. Then, the detection result is output to the image sensor movement control unit 36. The imaging element movement control unit 36 determines the movement direction and movement amount of the imaging element 12 from the detection result of the vibration detection sensor 35 and the lens information recorded in the lens information recording unit 20, and sets the determined movement direction and movement amount to the determined movement direction and movement amount. Based on this, the actuator 21 is controlled to move the image sensor 12.

  The user can also observe the subject through the optical viewfinder 37. Here, from such an optical viewfinder 37, it is difficult to know the effect of the above-described camera shake correction function. Therefore, when the camera shake correction function is operated, the image after the camera shake correction function is operated is displayed on the monitor instead of the optical viewfinder 37.

  The switch 38 is a switch group for causing the arithmetic control unit 25 to start various controls.

  Next, a camera shake correction technique different from the technique of reducing the influence of camera shake by moving the image sensor described above will be described with reference to FIG. That is, in FIG. 7, camera shake correction is performed based on electrical processing. Such camera shake correction is performed according to the timing chart of FIG. That is, when the subject 110 is photographed via the photographing optical system 11, the output of the image sensor 12 is sequentially guided to the integrating unit 42 using the switch switching control unit 40 and the switch 41.

  Here, as described with reference to the timing chart of FIG. 4, the switching of the switch is performed in a short time so as not to be affected by camera shake. As a result, the integration unit 42 outputs an analog image signal that is not affected by camera shake. The image signals are sequentially read out using the switch 43. As a result, digital image signals that are not affected by camera shake are sequentially recorded in the image memory 44.

  As a result, as shown in FIG. 9, a plurality of image signals can be obtained by one shooting. Image signals obtained from the image sensor 12 at these different timings are input to the comparison unit 45. The comparison unit 45 deletes an image signal that is significantly different from the other image signals from among the input image signals, selects an image signal having a high degree of coincidence, and inputs it to the synthesis unit 46. The synthesizer 46 synthesizes the input image signals and cancels random noise. This improves the S / N of the signal. The image signal thus obtained is input to the image signal processing unit 14.

  The image signal processing unit 14 performs image processing similar to that described above, and then causes the recording unit 15 to record image data.

  Even in such a camera shake correction method, it is impossible to know the effect of camera shake correction using an optical viewfinder. However, as in the first embodiment, based on the image data after the camera shake correction and the camera shake information, the image forming data when the camera shake correction function is not operated in the processing forming unit 22 is formed in a pseudo manner. If the image is displayed on the monitor 24, the effect of the camera shake correction function can be easily seen.

  FIG. 10 is a block configuration diagram of an electric circuit when the technique of Embodiment 1 of the present invention is applied to a single-lens reflex camera. Note that a part of the configuration of the camera is the same as that of the camera shown in FIG. Therefore, the same components are denoted by the same reference numerals, and detailed description thereof is omitted. In the example of FIG. 10, camera shake correction is performed by moving the image sensor 12 by the actuator 21, but it goes without saying that the method described in FIG. 7 may be applied.

  That is, the camera 1 includes a movable mirror 51, a finder optical system (screen 52, pentagonal roof prism (hereinafter abbreviated as a pentaprism) 53), an eyepiece lens 54, and the like in addition to the configuration shown in FIG. ), Finder photometric sensor 55, photometric unit 56, sub mirror 57, field lens 58, optical path bending mirror 59, re-imaging lens 60, sensor array 61, shutter curtain 62, photometric optical system 63, an in-body photometric sensor 64, and a light control unit 65.

  The movable mirror 51 is disposed in a space between the shutter curtain 62 and the photographing optical system 11 so as to be retracted from the optical path of the photographing optical system 11 (hereinafter referred to as a retracted position 51a) and on the optical path of the photographing optical system 11. It is configured to be rotatable between a position where it is moved (hereinafter referred to as a normal position 51b). Here, when the movable mirror 51 is disposed at the normal position 51b, the movable mirror 51 is fixed in an inclined state with respect to the optical axis of the photographing optical system 11 by about 45 degrees. In this state, the reflecting surface of the movable mirror 51 is set to face the viewfinder optical system.

  That is, when the movable mirror 51 is at the normal position 51b, the light beam incident through the photographing optical system 11 is reflected by the movable mirror 51 and guided to the finder optical system. In the finder optical system, the incident light beam is formed as an optical image on the screen 52 and the image formed is guided to the pentaprism 53. The pentaprism 53 guides the image transmitted through the screen 52 in the direction of the eyepiece 54 (that is, behind the camera 1), and at the same time, inverts the left and right of the image. The eyepiece 54 enlarges the incident image. As a result, the photographer 111 can observe the subject.

  Further, an in-finder photometric sensor 55 is provided in the vicinity of the pentaprism 53. The in-finder photometric sensor 55 receives a part of the light beam incident on the pentaprism 53 and outputs a predetermined electric signal to the photometric unit 56. Here, the finder photometric sensor 55 is formed so as to be able to perform a photometric operation in a predetermined light receiving area in the photographing screen as shown in FIG. That is, the finder photometric sensor 55 includes a light receiving unit 55a that measures a predetermined area near the center and a light receiving unit 55b that measures a predetermined area near the peripheral edge, and can detect, for example, a backlight condition. It is configured.

  The photometric unit 56 performs a photometric operation based on the electrical signal input from the finder photometric sensor 55 to detect the brightness of the subject. Based on the detection result of the photometry unit 56, the arithmetic control unit 25 controls the strobe control unit 34.

  In addition, a part of the movable mirror 51, for example, a region in the vicinity of the substantially central portion is configured by a semi-transmissive mirror so that a part of the light beam from the photographing optical system 11 can be transmitted. A sub mirror 57 is disposed at a portion facing the region formed by the semi-transmissive mirror.

  That is, the sub mirror 57 is pivotally supported so that one end thereof is rotatable in a predetermined direction with respect to the back side of the movable mirror 51, that is, the surface facing the imaging element 12. The reflecting surface of the sub mirror 57 is disposed so as to face the above-described semi-transmissive mirror region of the movable mirror 51. In other words, the sub mirror 57 is arranged so as to form a predetermined angle as shown in FIG. 10 with respect to the movable mirror 51 when the movable mirror 51 is arranged at the normal position 51b. The sub mirror 57 is disposed at a predetermined position that is substantially parallel to the movable mirror 51 when the movable mirror 51 is disposed at the retracted position 51 a. As a result, the movable mirror 51 moves to the retreat position 51 a and at the same time, the sub mirror 57 retreats from the optical path of the photographing optical system 11.

  That is, when the movable mirror 51 and the sub mirror 57 are in the normal position, a part of the incident light beam transmitted through the photographing optical system 11 is reflected by the sub mirror 57 after passing through the semi-transmissive mirror region of the movable mirror 51. The reflected light beam is transmitted through the field lens 58, and further, the optical path is bent in a predetermined direction by the optical path bending mirror 59, and then transmitted through the re-imaging lens 60. Then, a pair of subject images are formed on the light receiving surface of the sensor array 61. The sensor array 61 converts the received subject image into an electrical signal and outputs it to the arithmetic control unit 25. In response to this, the arithmetic control unit 25 performs a predetermined focusing process.

  Here, this focusing process may be a TTL phase difference detection method that is generally applied. This TTL phase difference detection method will be briefly described. In this method, the arithmetic control unit 25 controls the lens driving unit 27 to monitor the output of the sensor array 61 while moving the photographing optical system 11 in the lens optical axis direction, and outputs from the sensor array 61. When the pair of subject images are in a predetermined positional relationship, it is determined that the subject is in focus, and at that time, driving of the photographing optical system 11 is stopped.

  Also, as described above, the shutter curtain 62 is disposed in the vicinity of the light receiving surface side of the image sensor 12. That is, the image sensor 12 is configured to receive the light beam from the photographing optical system 11 only during the period when the shutter curtain 62 is in the open state. Here, as a configuration of the shutter curtain itself, a configuration generally used in a conventional single-lens reflex camera is applied. The configuration of the shutter curtain 62 will be briefly described with reference to the schematic diagram of FIG.

  As shown in FIG. 12, the shutter curtain 62 includes two curtain members, a front curtain 62a and a rear curtain 62b. In the normal state, the front curtain 62a is disposed in front of the light receiving surface of the image sensor 12, and the light receiving surface of the image sensor 12 is shielded.

  Here, when the exposure operation is executed, first, the movable mirror 51 and the sub mirror 57 are moved to a predetermined retracted position 51a. In this state, the front curtain 62a starts to move in the arrow Y1 direction. Subsequently, after a predetermined time, the trailing curtain 62b starts to move in the Y2 direction (the same direction as Y1). Therefore, a predetermined gap is generated between the front curtain 62a and the rear curtain 62b. The exposure time to the image sensor 12 can be adjusted by adjusting the size of the gap, that is, by adjusting the time for the front curtain 62a and the rear curtain 62b to start moving.

  Further, a predetermined pattern is formed on the surface of the front curtain 62a so that the light beam reflected by the surface of the front curtain 62a has a standard reflectance. That is, the light beam reflected by the surface of the front curtain 62 a is received by the in-body photometric sensor 64 through the photometric optical system 63. The in-body photometric sensor 64 converts the incident light beam into an electrical signal and outputs it to the light control unit 65. The light control unit 65 measures the amount of incident light from the subject 110 and performs predetermined light control based on the electrical signal output from the in-body photometric sensor 64.

  In such a single-lens reflex camera, the quick return mirror including the movable mirror 51 and the sub mirror 57 is retracted from the optical path of the photographing optical system 11 during photographing. For this reason, when camera shake correction is performed by electrical processing, or when camera shake correction is performed by moving the image sensor 12 by the actuator 21, the result of camera shake correction is observed through the viewfinder optical system. I can't.

  Therefore, when the camera shake correction function is operated in such a configuration, the result is displayed on the monitor.

  Next, a display process when displaying the effect of the camera shake correction function on the monitor in step S16 in FIG. 3 will be described.

  When displaying the effect of camera shake correction, for example, as shown in FIG. 5, an image when the camera shake correction function is not operated and an image when the camera shake correction function is operated are simultaneously displayed. If such a display is performed, the user can understand the value of the camera shake correction function of the camera, and can improve his / her photographing technique. For example, while taking into consideration camera shake, a camera without camera shake correction can be used to take a picture without camera shake. It is also possible to determine whether a camera with a camera shake correction function or a camera without a camera shake correction function is suitable for the user by taking a picture when purchasing the camera and viewing this image.

  However, since the size of the monitor mounted on the camera is limited, the effect of the camera shake correction function may not be confirmed on the camera monitor depending on the size of the camera shake.

  In other words, image blur that was not noticeable when confirmed on the monitor of the camera may become noticeable during photo printing.

  In the first embodiment, in order to solve such a problem, image data when the camera shake correction function is operated (hereinafter referred to as first image data) and an image blur level generated in the first image are obtained. Corresponding information is displayed on the monitor 24. Further, image data when the camera shake correction function is not operated (hereinafter referred to as second image data) and an image blur level that is considered to have occurred in the second image are displayed on the monitor 24. Such display control will be described with reference to FIG.

  That is, in the flowchart of FIG. 13, first, the calculation control unit 25 forms second image data in a pseudo manner based on the image data generated by the image signal processing unit 14 and the calculation result in the camera shake detection unit 19. (Step S100). In addition, the arithmetic control unit 25 creates image blur level data when the camera shake correction is not performed from the camera shake amount detected by the camera shake detection unit 19, that is, second image blur level data (step S101).

  Next, the arithmetic control unit 25 uses the camera shake amount detected by the camera shake detection unit 19 and the control information of the actuator 21 at this time to obtain image shake level data when the camera shake correction function is operated, that is, first image data. Image blur level data is created (step S102).

  Details of the control in steps S101 and S102 will be described. FIG. 14A and FIG. 14B show temporal changes in image blur at the time of shooting. In these figures, when there is no camera shake, the image on the surface of the image sensor corresponding to one point on the subject is a point image, but when there is a camera shake, the image is not converted into a point image. The image shakes as the camera shakes on the surface. Here, this phenomenon in which the point image shakes, that is, a phenomenon in which an image blurs in one-to-one correspondence with camera shake is called image blur. Here, FIG. 14A shows a temporal change of image blur with respect to the X direction when a plane orthogonal to the photographing optical axis is taken as an XY plane. On the other hand, FIG. 14B shows a temporal change in image blur in the Y direction.

In these figures, the exposure start time is t ₀ and the exposure end time is t _c . In FIG. 14A, a curve 300 is image blur corresponding to camera shake during exposure in the X-axis direction, and is an image blur when the camera shake correction function is not operated. This image blur gradually increases from time t ₀ as a base point, and reaches a maximum image blur amount of 68 μm on the plus side at time t _px . Thereafter, the image blur is gradually reduced, the maximum value -38μm the negative side in the exposed end time t _c.

  Here, the curve 300 is an image blur when the camera shake correction function is not operated to the last. Actually, the actuator 21 is driven according to the camera shake information detected by the camera shake detection unit 19 to drive the image sensor 12. The correction is performed by moving in the XY plane. Here, the time variation of the position of the image sensor 12 in the X-axis direction when the image sensor 12 is moved by the actuator 21 to prevent image blur caused by camera shake is indicated by a dashed line curve 301.

  Camera shake correction reduces the effects of image blur by moving the image sensor 12 in the direction in which the image blur occurs, and the photo looks as if image blur has not occurred. The goal is to shoot. That is, if the curve 300 and the curve 301 are completely coincident with each other, the image blur is completely canceled, and a photograph without image blur can be taken.

  However, the curve 300 and the curve 301 in FIG. That is, when the image pickup device 12 is moved by the actuator 21, a mechanical response delay occurs, which is a cause of the mismatch between the curve 300 and the curve 301 as indicated by reference numerals 301a and 301c in FIG. Become. Further, the actuator 21 has a limited movement range, and if the camera shake exceeds the maximum movement range of the actuator 21, the actuator 21 cannot follow any more. In such a case, a mismatch occurs between the curve 300 and the curve 301 as indicated by reference numeral 301b in FIG.

  For these reasons, the image blur due to the occurrence of camera shake cannot be completely corrected, and the difference between the curve 300 and the curve 301, that is, the image blur in the X-axis direction as indicated by the curve 302 occurs.

  On the other hand, the same applies to the Y-axis direction. Here, as in the case of FIG. 14A, the image blur when the camera shake correction function is not operated is a curve 310 in FIG. 14B, and the image sensor 12 is moved by the actuator 21. A time variation of the position of the image sensor 12 is a curve 311. Also in this case, there is a mismatch between the curve 310 and the curve 311 due to the mechanical response delay indicated by reference numerals 311a and 311c, and a mismatch between the curve 310 and the curve 311 due to the limitation of the movement range of the actuator 27 indicated by reference numeral 311b. Arise.

  As a result, the image blur due to the occurrence of camera shake cannot be completely corrected, and a difference between the curve 310 and the curve 311, that is, an image blur in the Y-axis direction as indicated by the curve 312 occurs.

  When these are arranged, the temporal fluctuation of the image blur level (first image blur level) that occurs when the camera shake correction function is operated becomes a curve 302 in the X-axis direction and a curve 312 in the Y-axis direction. That is, when image blurring is considered in the XY plane, the curve 302 and the curve 312 are synthesized in the XY plane. Further, the temporal fluctuation of the image blur level (second image blur level) when the camera shake correction function is not operated becomes a curve 300 in the X-axis direction and a curve 310 in the Y-axis direction. That is, when image blurring is considered in the XY plane, the curve 300 and the curve 310 are synthesized in the XY plane.

  Here, the description returns to FIG. That is, after creating the image blur level data in step S102, the arithmetic control unit 25 performs image comparison display on the monitor 24 (step S103). In this image comparison display, first, the first image blur level display 321 associated with the first image data 320 when the camera shake correction function is operated is visually displayed on the monitor 24 as shown in FIG. To display automatically.

  As the first image blur level display 321, first, an image in which an image blur generated when the camera shake correction function corresponding to the first image data 320 is operated is expressed by an analog display corresponding to the size of the image blur. Displayed as a blur locus 322. The image blur locus 322 is obtained from the curves 302 and 312 by calculation. Further, the first image blur level display 321 displays circle displays 323 and 324 which are indices indicating the magnitude of the image blur together with the locus 322.

  Here, the circle display 323 is a display in which the magnitude of image blur due to camera shake is 25 μm. That is, the image blur level when the image blur locus 322 fits within the circle display 323 is a level that is hardly recognized by human eyes.

  The circle display 324 is a display indicating that the size of camera shake is 50 μm. The image blur level when the image blur locus 322 is in the range between the circle display 323 and the circle display 324 is a level at which a slight influence of the image blur is seen when the photo print is made. This level is a level at which camera shake (image blur) may or may not be noticed by a person. Further, the image blur level when the image blur locus 322 is outside the circle display 323, that is, when the image blur is larger than 50 μm, is a level in which camera shake (image blur) is clearly noticeable when a photo print is made.

  Here, when the image blur locus 322 is within the circle display 323 as shown in FIG. 15A, the image blur locus 322 is displayed in, for example, green because there is almost no influence of camera shake (image blur). . In addition, as shown in FIG. 15B, when the image blur locus 322 protrudes outside the circle display 324, camera shake (image blur) is clearly noticeable when the photo print is made. The image blur locus is displayed in red, for example. Further, as shown in FIG. 15C, when the image blur locus 322 is intermediate between FIGS. 15A and 15B, the image blur locus 322 is displayed in yellow, for example.

  In step S103, after performing such display, the arithmetic control unit 25 determines whether or not an image changeover switch (not shown) is in an ON state (step S104). If it is determined in step S104 that the image changeover switch is not in the ON state, the image comparison display is continued. On the other hand, when it is determined that the image changeover switch is in the ON state, the arithmetic control unit 25 determines whether or not the image changeover switch has been turned on for 2 seconds or longer, that is, a so-called long press (step S105). If it is determined in step S105 that no long press has been performed, the image display is switched (step S106).

  As the switching of the image display, for example, when the image of FIG. 15A is displayed on the monitor 24, the image of FIG. 15B is displayed. The image in FIG. 15B is switched so as to visually display the second image data 330 when the camera shake correction function is not operated and the second image blur level corresponding to this image. On the other hand, when the image of FIG. 15B is displayed, the image is switched to the image of FIG. Here, as the display shown in FIG. 15B, the second image data 330, the image blur locus 322 and the circle displays 323 and 324 described in FIG. 15A are displayed. Here, the image blur locus 322 in FIG. 15B is calculated from the curves 300 and 310.

  In this way, every time a screen changeover switch (not shown) is turned ON / OFF, the image display shown in FIG. 15A and the image display shown in FIG. 15B are alternately switched.

  If it is determined in step S105 that the image changeover switch has been pressed for a long time, both the first image blur level data and the second image blur level data are recorded in the recording unit 15, and FIG. Return to the flowchart.

  As described above, since the image blur level data is recorded in the recording unit 15, the user can confirm the effect of the camera shake correction function on a monitor other than the camera after shooting. For example, if the image blur level data recorded in the recording unit 15 is transferred to a personal computer (PC) or the like, it can be confirmed in detail on a PC monitor or the like. Further, by transferring the image blur level data to the PC, it is possible to statistically check the camera shake state in many images after shooting. By performing such an analysis, the user can always check the state of camera shake in his / her photography. For example, if the result of this check indicates that camera shake is large, a learning effect can be expected in which attention is paid so as not to cause camera shake during the next shooting.

  Further, as a modification of such image blur level display, the display mode of the image comparison display in step S103 may be modified as shown in FIG. In this modification, the first image data 350 when the camera shake correction function is operated and the second image data 352 when the camera shake correction function is not operated are displayed side by side, and these image data are displayed below the image data. The first image blur level 351 is displayed in association with the first image data 350, and the second image blur level 353 is displayed in association with the second image data 352 in a bar display. In this case, the length of the bar display corresponds to the size of the image blur. Even in this case, the color of the bar display may be changed according to the size of the image blur.

  Further, the display mode of the image comparison display may be modified as shown in FIG. In this modification, the first image data 350 when the camera shake correction function is operated and the second image data 352 when the camera shake correction function is not operated are displayed side by side, and the left shoulders of these image data display units are displayed. A number corresponding to image blur is displayed on the screen. For example, “1” indicated by reference numeral 354 indicates a case where the image blur is less than 25 μm, and “3” indicated by reference numeral 355 indicates a case where the image blur is 50 μm or more.

  Further, the followability of the actuator 21 is very good, and there is no fear of follow-up delay due to camera shake (image blur). Furthermore, the movement range of the actuator 21 is very large, and the camera shake exceeding the movement range of the actuator 21. When (screen blur) cannot be considered, the image blur level when the camera shake correction function is operated may be regarded as zero. In this way, when a very complete camera shake correction mechanism can be realized, it is not necessary to display the first image blur level corresponding to the first image data on the monitor 24, and only the second image blur level is displayed. You can do that. In this case, it is not necessary to record the first image blur level data in step S107, and only the second image blur level data may be recorded.

  Although the present invention has been described based on the above embodiments, the present invention is not limited to the above-described embodiments, and various modifications and applications are naturally possible within the scope of the gist of the present invention. For example, in the first embodiment, an example in which the technology of the present invention is applied to a digital camera is described. However, the technology of the present invention is a composite product having a camera function, for example, a mobile phone with a camera function, with a camera function. The present invention can also be applied to a personal digital assistant (PDA), a portable computer with a camera, and the like.

  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 is described in the column of the effect of the invention. When an effect is obtained, a configuration from which this configuration requirement is deleted can be extracted as an invention.

It is a block diagram which shows the notional structure of the camera which concerns on Example 1 of this invention. It is an example of the image signal imaged in an image sensor. It is a flowchart shown about the control at the time of imaging | photography of the camera which concerns on Example 1 of this invention. 3 is a timing chart during camera shake shooting of the camera according to Embodiment 1 of the present invention. It is a figure which shows the example of a display of the image displayed on a monitor. It is a block diagram at the time of applying the technique of Example 1 of this invention to a compact camera. It is a block diagram which shows the structure of the modification of a camera shake prevention function. It is a timing chart at the time of camera shake prevention in a modification. It is a figure for demonstrating the image composition process in a modification. It is a block diagram at the time of applying the technique of Example 1 of this invention to a single-lens reflex camera. It is a figure for demonstrating the photometry area | region of the photometry sensor in a finder. It is a figure for demonstrating the structure of a shutter curtain. It is a flowchart which shows the control at the time of displaying the effect of the camera-shake correction function in Example 1 of this invention. It is a figure which shows the time change of an image blur. It is a figure which shows the example of a display at the time of displaying the effect of a camera-shake correction function. It is a figure which shows the 1st modification of the example of a display at the time of displaying the effect of a camera shake correction function. It is a figure which shows the 2nd modification of the example of a display at the time of displaying the effect of a camera-shake correction function. It is a figure which shows the 1st example of the camera which has the camera-shake correction function of a prior art example. It is a figure which shows the 2nd example of the camera which has the camera-shake correction function of a prior art example. It is a figure which shows the 3rd example of the camera which has the camera-shake correction function of a prior art example. It is a figure which shows the 4th example of the camera which has the camera-shake correction function of a prior art example.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Camera, 11 ... Imaging optical system, 12 ... Main image pick-up element (image pick-up element), 13, 18 ... AD conversion part, 14 ... Image signal processing part, 15 ... Recording part, 16 ... Light receiving lens, 17 ... Sub image pick-up element , 19: Camera shake detection unit, 19a, 44 ... Image memory, 19b, 45 ... Comparison unit, 19c ... Movement direction calculation unit, 19d ... Movement amount calculation unit, 20 ... Lens information recording unit, 21 ... Actuator for driving image sensor , 22 ... processing forming unit, 23 ... monitor control unit, 24 ... monitor, 25 ... calculation control unit, 35 ... vibration detection sensor, 36 ... image sensor movement control unit

Claims (13)

Photographic optics,
An image sensor that receives light flux incident through the photographing optical system and outputs image data;
A camera shake correction unit that obtains first image data with reduced influence of camera shake by performing position control of the image sensor or processing image data from the image sensor;
A monitor that displays the captured image data;
A camera shake detection unit for detecting a camera shake state of the camera;
Based on the first image data and the camera shake state detected by the camera shake detection unit, a process forming unit that processes and forms the second image data when the camera shake correction unit is not operated,
A blur level generator for generating a first image blur level generated when the camera shake correction unit is operated and a second image blur level generated when the camera shake correction unit is not operated;
The first image data and the second image data are displayed on the monitor, and the first image blur level and the second image blur level are respectively associated with the first image data and the second image data. A monitor control unit for controlling to display on the monitor;
A camera comprising: Photographic optics,
An image sensor that receives light flux incident through the photographing optical system and outputs image data;
A viewfinder for observing the subject to be photographed,
A camera shake correction unit that obtains first image data with reduced influence of camera shake by performing position control of the image sensor or processing image data from the image sensor;
A monitor that displays the captured image data;
A camera shake detection unit for detecting a camera shake state of the camera;
Based on the first image data and the camera shake state detected by the camera shake detection unit, a process forming unit that processes and forms the second image data when the camera shake correction unit is not operated,
A blur level generator for generating a first image blur level generated when the camera shake correction unit is operated and a second image blur level generated when the camera shake correction unit is not operated;
The first image data and the second image data are displayed on the monitor, and the first image blur level and the second image blur level are respectively associated with the first image data and the second image data. A monitor control unit for controlling to display on the monitor;
A camera comprising: Photographic optics,
An image sensor that receives light flux incident through the photographing optical system and outputs image data;
A camera shake correction unit that obtains image data with reduced influence of camera shake by performing position control of the image sensor or processing image data from the image sensor;
A monitor that displays the captured image data;
A camera shake detection unit for detecting a camera shake state of the camera;
A blur level generator that generates an image blur level of image data generated when the camera shake correction unit is operated and an image blur level of image data generated when the camera shake correction unit is not operated;
Control is performed so that the image blur level of image data generated when the camera shake correction unit is operated and the image blur level of image data generated when the camera shake correction unit is not operated are displayed on the monitor. A monitor control unit;
A camera comprising: Photographic optics,
An image sensor that receives light flux incident through the photographing optical system and outputs image data;
A camera shake correction unit that obtains image data with reduced influence of camera shake by performing position control of the image sensor or processing image data from the image sensor;
A monitor that displays the captured image data;
A camera shake detection unit for detecting a camera shake state of the camera;
A blur level generating unit that generates an image blur level of image data generated when the camera shake correction unit is not operated;
A monitor control unit for controlling the image blur level to be displayed on the monitor;
A camera comprising: Photographic optics,
An image sensor that receives light flux incident through the photographing optical system and outputs image data;
A camera shake correction unit that obtains image data with reduced influence of camera shake by performing position control of the image sensor or processing image data from the image sensor;
A camera shake detection unit for detecting a camera shake state of the camera;
A recording unit for recording captured image data;
A blur level generator that generates an image blur level of image data generated when the camera shake correction unit is operated and an image blur level of image data generated when the camera shake correction unit is not operated;
Control is performed so that the image blur level of image data generated when the camera shake correction unit is operated and the image blur level of image data generated when the camera shake correction unit is not operated are recorded in the recording unit. A recording control unit;
A camera comprising: Photographic optics,
An image sensor that receives light flux incident through the photographing optical system and outputs image data;
A camera shake correction unit that obtains image data with reduced influence of camera shake by performing position control of the image sensor or processing image data from the image sensor;
A camera shake detection unit for detecting a camera shake state of the camera;
A recording unit for recording captured image data;
A blur level generating unit that generates an image blur level of image data generated when the camera shake correction unit is not operated;
A recording control unit for controlling the image blur level of image data generated when the camera shake correction unit is not operated to be recorded in the recording unit;
A camera comprising:   The camera according to claim 1, wherein the camera shake detection unit is a vibration detection sensor that detects a vibration state of the camera.   The camera according to claim 7, wherein the vibration detection sensor is an angular velocity sensor or an acceleration sensor.   The camera according to any one of claims 1 to 6, wherein the camera shake detection unit detects the camera shake state based on image data obtained from the image sensor.   The camera according to claim 9, wherein the image data is at least two or more image data obtained by the image sensor at different timings.   5. The camera according to claim 1, wherein the display of the image blur level by the monitor control unit is performed by an analog display corresponding to the magnitude of the detected image blur level.   12. The camera according to claim 11, wherein the analog display corresponding to the detected image blur level is a display corresponding to a blur locus of image data.   5. The camera according to claim 1, wherein the display of the image blur level by the monitor control unit is performed by expressing the detected image blur level in a character display.

Images