JP3424468B2 - Image stabilizer and camera - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blur correction device and a camera for optically correcting blur of a subject image.

[0002]

2. Description of the Related Art Generally, a blur correction device is provided with a blur correction lens whose optical axis can be changed, and the blur direction and blur amount of a subject image based on the blur of the device (hereinafter, such information is referred to as blur information). ) Is provided,
Based on the blur information detected by the sensor, the optical axis of the blur correction lens is changed to cancel the blur of the subject image. Further, in a camera equipped with a shake correction device, the shake information detected by the sensor is displayed on a display unit in the viewfinder or a display unit provided on the camera body so that the camera shake state can be visually confirmed. There is.

For example, Japanese Unexamined Patent Publication No. 7-218958 discloses a camera that calculates the amount of camera shake based on the output of an angular acceleration detection sensor and displays the calculation result on a shake state indicator composed of an LED. In this camera, the blinking speed of the LED is changed according to the amount of camera shake, and the state of camera shake can be confirmed by this blinking speed.

Further, Japanese Unexamined Patent Publication No. 5-313241 discloses a blurring display device which detects a blurring direction and a blurring amount by an angular acceleration sensor and displays the detection result as a vector. This blurring display device has a display unit in which a plurality of LEDs are arranged in a matrix, and turns on a predetermined number of LEDs arranged in a direction corresponding to the detected blurring direction according to the blurring amount. This allows blurring to be displayed as a vector.

Further, Japanese Patent Application Laid-Open No. 6-18973 discloses that
While the camera is preparing to press the shutter button halfway, the amount of camera shake is detected, and the result of this detection is displayed on the display that shows the shooting information such as shutter speed, focal length, exposure control value, and exposure correction value. A correction camera is shown.
In this camera shake correction camera, the display section of the shooting information is composed of a scale indicating the shooting information and a segment group provided corresponding to this scale, and by using this segment group, the detected camera shake blur level is level. It is supposed to be displayed.

[0006]

By the way, the display of the detected amount of blurring is significant for judging the necessity of the blurring prevention measure, but it actually occurs in a camera having a blurring correction function, for example. If it is possible to confirm how much the blurring is corrected by the blurring correction function, it is possible to take a suitable blurring prevention measure according to the blurring amount, which is more meaningful.

However, each of the above-mentioned conventional blur display devices displays the actual blurring state by displaying the blurring amount detection value, and when the blurring correction function corrects the blurring. There is no proposal to display a predicted value of the remaining blur correction amount of a subject image.

The present invention has been made in view of the above problem, and provides a camera and a camera capable of confirming the camera shake correction effect of the camera shake correction function.

[0009]

According to a first aspect of the present invention, there is provided a blur correction device which detects information relating to a blur of a subject image and optically corrects the blur of the subject image based on the detection result. Computation means for computing the predicted value of the remaining blur correction amount of the subject image after the blur correction using the detected information on the blur of the subject image, and blur correction for displaying the calculated predicted value of the remaining blur correction amount of the subject image. The remaining amount display means is provided .

According to a fourth aspect of the invention, the blur of the subject image is
Information related to
In a camera that optically corrects the blurring of the body image,
Using the information on the blur of the subject image
Calculating the predicted value of the remaining blur correction amount of the subject image after correction
And the predicted value of the remaining shake correction amount that has been calculated.
It is provided with a blur correction remaining amount display means for displaying.
And

According to the structure of claim 1 or claim 4,
For example, the information regarding the blur of the subject image (the blur direction and the blur amount in each blur direction) is detected, and the blur of the subject image is optically corrected based on the detection result. In this blur correction process, the predicted value of the remaining blur correction amount of the subject image after the optical blur correction is calculated using the information about the blur, and the calculation result is displayed. The user can confirm the effect of the shake correction by displaying the predicted value of the remaining shake correction amount.

According to a second aspect of the present invention, the blur correction device further includes blur information display means for displaying information on the detected blur of the subject image .
It

The invention according to claim 5 is the same as that according to claim 4.
This relates to the blur of the detected subject image in the camera.
It has a blur information display means for displaying information
And

According to the second or fifth aspect of the invention , in addition to the display of the predicted value of the shake correction remaining amount after the shake correction, information on the detected shake is displayed. This allows the user to confirm the actual blurring state and the state after optical blur correction.

It should be noted that according to claim 3 or 6,
As is clear, it is considered that the blur correction remaining amount display means and the blur information display means both serve as one display section.
Yes.

According to the third or sixth aspect of the invention , the blurring information and the predicted value of the blurring correction remaining amount after the blurring correction are displayed by one display unit. As a result, the state of camera shake actually occurring and the state after optical shake correction can be simultaneously compared and confirmed.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION A blur correction device according to the present invention will be described by taking a camera equipped with the blur correction device as an example.

FIG. 1 is a front perspective view showing the external appearance of a camera equipped with a blur correction device according to the present invention, and FIG. 2 is a rear view of the camera.

The camera 1 has a blur correction function capable of correcting blur of a photographed image due to camera blur and photographing. The camera 1 has a taking lens 3 composed of a zoom lens in the front center of the camera body 2, and inside the taking lens 3, an optical system for blur correction described later is provided. A lens shutter formed by combining a plurality of shutter blades is provided in the lens system of the taking lens 3.

The taking lens 3 on the front of the camera body 2
A distance measuring window 5 is provided on the upper part of the, and a light measuring window 4 is provided on the left side of the distance measuring window 5. Further, a viewfinder objective window 6 is provided on the right side of the distance measuring window 5, and a zoom interlocking type built-in flash 7 is further provided on the right side thereof.

At the rear position of the photometric window 4 of the camera body 2,
A photometric circuit having a light receiving element made of SPC or the like is provided, and the light receiving element receives light from the subject to detect the brightness of the subject. Further, at the rear position of the distance measuring window 5 of the camera body 2, a phase difference detection type distance measuring circuit having a light receiving element composed of a pair of line image sensors is provided, and the light from the subject is received by the light receiving element. The distance to the subject is detected.

A finder optical system for guiding a subject light image to a finder eyepiece window 10 provided on the rear surface of the camera body 2 is provided behind the finder objective window 6 of the camera body 2. In the finder optical system,
CCD for detecting information (camera direction and camera shake amount information) regarding camera shake of the subject light image on the exposure surface
A sensor including an area sensor is provided. Also,
The viewfinder optical system is provided with a field of view frame and a display unit for displaying information regarding blur correction of a subject optical image (hereinafter referred to as a blur image) that is blurred by the camera.

FIG. 3 is a diagram showing an example of the display section in the finder.

The display section is provided at the bottom of the field frame K and at both left and right sides, and AF (automatic adjustment), AE (automatic exposure adjustment) and flash are provided in the display area A1 provided at the bottom of the field frame K. Information regarding light emission is displayed, information regarding the presence or absence of blur correction is displayed in the display area A2 on the right side of the field frame K, and display areas A3 and A4 provided in the lower left corner of the field frame K will be described later. The blur amount of the blur image detected by the blur amount detection circuit (hereinafter, referred to as blur amount detection value) and the blur correction remaining amount after blur correction (the difference between the blur amount before blur correction and the blur amount reduced by blur correction). ) The predicted value is displayed.

In the display area A2, LED displays P1 and P
2, P3 and symbol mark displays SP1, SP2 are provided. The LED display P1 is a display indicating that the shake correction mode described later is set, and the LED display P2 is a display indicating that the shake correction mode is released. Further, the LED display P3 is a display indicating that the shake correction is impossible, and the symbol mark displays SP1 and SP2 are
Each is a display showing the cause of the blurring correction not possible. That is, the symbol mark display SP1 indicates that the blurring amount is excessive and the blurring correction cannot be effectively performed, and the symbol mark display SP2 indicates that the voltage of the power supply battery is too low to perform the blurring correction operation. . The information regarding the presence / absence of blur correction is displayed on these LED displays P1, P2, P3.
And the symbol mark displays SP1 and SP2 are turned on.

A plurality of LEDs are provided in the display areas A3 and A4.
There is provided a level display section in which the lines are arranged in a line. The display area A3 is for displaying the blur amount detection value in the X direction and the blur correction remaining amount as a level.
Indicates the level of the shake amount detection value and the shake correction remaining amount in the Y direction.

The level display section provided in the display areas A3 and A4 has three areas L1, L2 and L2 as shown in FIG.
Each area L1, L2, L3 is divided into L3 and is displayed in yellow, green and red, respectively.

The area L1 is an area in which the amount of blur is so small that the blur correction is not required. When the peak value of the displayed blur amount detection value is in the area L1, it indicates that the influence of the camera shake currently occurring on the photographing is small enough not to cause a problem, and the peak of the remaining blur correction amount displayed is displayed. When the value is in the region L1, it indicates that the blur correction suppresses the blur of the subject light image to the extent that it does not adversely affect the photography.

The region L2 is a medium region in which the amount of blur requires blur correction and is capable of blur correction. When the peak value of the displayed blur amount detection value is in the area L2, it indicates that the influence of the camera shake currently occurring on the photographing is large enough to cause a problem, and the blur amount is corrected by performing the shake correction. When the peak value of the remaining blur correction amount displayed is in the region L2, the blur of the subject light image adversely affects the photography even when the blur correction is performed. Indicates that camera shake countermeasures are necessary.

The area L3 is an area in which the amount of blur is too large to compensate the blur. When the peak value of the displayed blur amount detection value is in the region L3, it indicates that the blur amount of the camera shake that is currently occurring is too large and the blur correction cannot be normally performed. This display also serves as a warning display that the photographer needs to take measures against camera shake such as fixing the camera, changing the exposure control value, or flashing. The peak value of the displayed blur amount detection value is in the region L.
In the case of 3, the optical blur correction is not performed in the exposure control, so the calculation of the residual blur correction amount and its display are not performed. Therefore, normally, the peak value of the displayed residual blur correction amount is within the range. Never enter L3.

For example, as shown in FIG. 5A, the blur amount detection value and the blur correction remaining amount are equal to a plurality of L's corresponding to the blur amount.
The level is displayed by turning on the ED dot P4. Note that, as shown in FIG. 7B, the peak value may be displayed by turning on only one LED dot P5 corresponding to the peak value of the blur amount. In this case, the blur amount detection value and the blur correction remaining amount may be displayed separately, but they may be displayed simultaneously as shown in FIG. This has an advantage that the effect of blur correction can be easily confirmed.

In FIGS. 5 and 6, the white LE is shown.
The D dot indicates the extinguished state, and the dotted LED dot indicates the lit state. In FIG. 6, the peak value of the blur correction remaining amount is displayed by the LED dot P6, and the peak value of the blur amount detection value is displayed by the LED dot P7.

Further, as shown in FIG. 7, the level display of the display areas A3 and A4 has a two-stage configuration, in which the blur amount detection value is displayed in the upper stage and the blur correction remaining amount is displayed in the lower stage. Good. Also in this case, the level display shown in FIG. 8A and the peak value display shown in FIG. 8B can be performed.
According to this display method, it is easy to compare the blur amount detection value and the blur correction remaining amount, and the blur correction effect can be confirmed quickly. In addition, in FIG. 8, the white LED dot is
The light-off state is shown, and the dotted LED dots show the light-on state.

In the present embodiment, the level display portion is formed by arranging a plurality of LED dots in a linear shape, but it may be arranged in a circular shape. In the circular level display unit, the magnitudes of the blurring amount detection value and the blurring correction remaining amount are determined by the tip of the turned-on LED dot group or the angular position of the LED dot displaying the peak value. This display method can be applied when there is no band-shaped display space.

Further, in this embodiment, the blur amount detection value and the blur correction remaining amount are displayed quantitatively, but to the photographer, how much the quantitative value specifically affects the photographing. Since it is more meaningful, the blur amount detection value and the blur correction remaining amount may be converted into a blur image state and qualitatively displayed.

As a method of displaying the state of the blurred image, for example, a method of displaying by the clarity of the outline of a symbol mark such as a figure or a character can be considered. For example, the LCD display unit 11 (see FIG. 2) is provided with a blur image status display unit, and the dot display density of the symbol mark is changed in accordance with the blur amount detection value and the blur correction remaining amount to make the outline of the mark clear. The degree of change or the two symbol marks of the same shape are displayed on the LCD display unit 11, and the display position of one symbol mark with respect to the other symbol mark is changed according to the blur amount detection value and the blur amount of the blur correction remaining amount. You may make it shift.

Alternatively, the thickness of the line of the symbol mark is made variable, and the thickness of the line of the symbol mark is increased as the blurring of the blurred image increases, and the degree of unclearness of the contour line of the blurred image is imaged. You may allow it.

In these cases, for example, the shape of the symbol mark is made rectangular, the thickness of the vertical line is changed according to the blur amount in the X direction, and the thickness of the horizontal line is changed according to the blur amount in the Y direction. By doing so, it is possible to display the state of the blurred image in both directions.

Returning to FIG. 1, a grip portion 2a is provided on the left side of the camera body 2, and a shutter button 8 is provided on the upper surface of the camera body 2 and above the grip portion 2a. The shutter button 8 is an operation member of an S1 switch (see FIG. 9) that is turned on by half-pressing and an S2 switch (see FIG. 9) that is turned on by full-pressing. The S1 switch is a switch for instructing shooting preparation. When the S1 switch is turned on, the subject brightness is detected by the photometric circuit, and the exposure control value (aperture value and shutter speed control value) is based on the detection result. Is calculated. The distance measuring circuit detects the subject distance, and AF control is performed based on the detection result. Further, it is checked whether or not the power source battery can be subjected to shake correction (hereinafter referred to as battery check), and the check result is displayed in the display area A2.

A blur correction mode setting button 9 for setting the blur correction mode is provided on the right side of the upper surface of the camera body 2. The blur correction mode is a mode in which a blur image is corrected and photographed when camera shake occurs. The reason why the blur correction mode is selectively set by the photographer is that there is a case in which a blur image may be intentionally photographed aiming at the blur effect.

When the shake correction mode setting button 9 is operated, the shake correction switch SB (see FIG. 9) is turned on,
The operation information is input to the control unit 20 (see FIG. 9) that centrally controls the shooting operation of the camera. When the camera is activated, the blur correction mode is initially set to "OFF", and the blur correction mode is alternately switched between "ON" and "OFF" each time an ON signal of the blur correction switch SB is input. LED display P corresponding to the display in the viewfinder
1 and P2 are turned on.

A finder eyepiece window 10 is provided on the upper left side of the rear surface of the camera body 2, and a display section 11 made of an LCD is provided substantially at the center. The LCD display unit 11 displays various kinds of information (exposure control value, battery capacity, flash emission, shooting mode, film sensitivity, presence / absence of shake correction, etc.) regarding shooting by the camera. This LCD
Operation buttons 12 for selecting a shooting mode (a mode such as self-timer shooting and continuous shooting), a flash emission mode, whether or not to reduce red-eye reduction, and a shooting scene are provided below the display unit 11. A main switch 13 is provided above the LCD display unit 11. Also,
A zoom switch 14 is provided on the upper right side of the rear surface of the camera body 2, and the zoom ratio of the taking lens 3 is changed by operating the zoom switch 14.

Further, a battery storage chamber 15 is provided at the right end of the camera body 2, and the power source battery E is set in the battery storage chamber 15. Power supply battery E is flash light, AE / A
It is a power supply source for various control operations such as F and exposure, and is also a power supply source for detecting information regarding camera shake and driving an optical system for shake correction.

FIG. 9 is a block diagram of a camera equipped with the shake correction device according to the present invention.

In the figure, the control unit 20 controls the AF, A
E is a microcomputer that centrally controls a series of photographing operations of the camera 1 such as exposure control and blur correction. The control unit 20 includes a shake correction control value calculation unit 201 that calculates drive control values for the shake correction lens 32 in the X direction and the shake correction lens 33 in the Y direction for performing shake correction, and the shake correction lens 3
A blur correction remaining amount calculation unit 202 that calculates a predicted value of the blur correction remaining amount of the subject light image on the exposure surface when the blur correction is performed by 2 and 33, and data and calculation results necessary for performing these calculations are stored. And a memory 203,
Display areas A3 and A4 of the display unit 361 in the finder
It has a function of displaying the current camera shake state and the camera shake state (predicted value) improved by the shake correction function.

In the exposure control, the control unit 20 causes the shake correction control value calculation unit 201 to perform this operation every time the shake amounts ξx and ξy in the X and Y directions detected by the shake amount detection circuit 31 described later are input. The drive control values of the blur correction lenses 32 and 33 for performing blur correction are calculated based on the detection results, and the X direction drive control value is supplied to the control circuit 34 of the X direction blur correction motor and the Y direction drive control. The value is output to the control circuit 35 of the Y-direction blurring correction motor to optically correct the blurring of the subject light image on the exposure surface.

The control unit 20 also detects the blurring amount ξ in the X and Y directions detected by the blurring amount detection circuit 31 during the preparation for photographing, for example, when the shutter button 9 is half pressed.
Each time x, ξy is input, this detection value is output to the display control circuit 36 to display the current camera shake state, while the shake correction remaining amount calculation unit 202 detects this detection value by a preset arithmetic expression. Image stabilization lens 32,3
The predicted value of the blur of the subject light image on the exposed surface (the predicted value of the residual blur correction amount) when the blur correction is performed by 3 is calculated,
The calculation result is output to the display control circuit 36 and the blur correction effect is displayed on the display unit 361 in the finder.

The details of the calculation of the remaining blur correction amount and the display of the blur amount before and after the blur correction will be described later.

The photometry circuit 21 is a circuit for detecting the subject brightness, and the distance measurement circuit 22 is a circuit for detecting the subject distance. The control unit 20 sets the exposure control value based on the detected subject brightness and also sets the AF control value of the taking lens 3 based on the detected subject distance.

The FL light emission control circuit 23 is a circuit for controlling the light emission of the built-in flash 7. The FL light emission control circuit 23 causes the built-in flash 7 to emit a predetermined light emission amount based on the light emission amount input from the control unit 20 at a predetermined light emission timing input from the control unit 20. When the red-eye reduction mode is set, the built-in flash 7 flashes a predetermined number of times immediately before the start of exposure control.

The Z motor control circuit 24 is a circuit for controlling the drive of the zoom lens 25 in the taking lens 3. A drive signal generated by the control unit 20 based on the operation direction and operation amount of the zoom switch 14 is input to the Z motor control circuit 24, and the Z motor control circuit 24 controls the drive of the zoom lens 25 based on this drive signal. . The AF motor control circuit 26 is a circuit that controls driving of the focus lens 27 in the taking lens 3. The AF motor control circuit 26 controls the drive of the focus lens 27 based on the AF control value input from the control unit 20 to automatically adjust the focus of the taking lens 3.

The diaphragm / shutter control circuit 28 is a circuit for controlling the aperture diameter and opening / closing drive of the lens shutter 29. The aperture / shutter control circuit 28 sets the maximum aperture diameter of the lens shutter 29 based on the exposure control value input from the control unit 20, and sets the lens shutter 2 at a predetermined timing.
Open / close operation 9 is performed.

The power source battery E is the main power source of the camera 1 housed in the battery housing chamber 15, and the voltage detection circuit 3
Reference numeral 0 is a circuit that detects the voltage of the power supply battery E. The voltage detection circuit 30 includes, for example, two high-resistance series circuits connected in parallel to the power supply battery E, detects the voltage of the power supply battery E by resistance division, and inputs the detected value to the control unit 20.

The control unit 20 checks the battery of the power supply battery E by the detection voltage input from the voltage detection circuit 30 at the time of start-up or at the start of the shooting preparation operation by the S1 switch, and determines whether or not the shooting control is possible. Further, when the shake correction mode is set by the shake correction mode setting button 9, when the shake correction switches SB and S1 are turned on, the battery check of the power supply battery E is performed by the detection voltage input from the voltage detection circuit 30. Then, it is determined whether or not the optical blur correction is possible.

When the maximum level of the battery voltage is Vmax, the minimum level of stable driving of the shake correction lens is VB, and the minimum level of the battery voltage capable of photographing is Vmin, the control unit is set when the shake correction mode is set. 20 is the detection voltage V
Is VB <V ≦ Vmax, the blur amount is detected by the blur amount detection circuit 31, and the determination result of whether or not the blur correction is possible based on the detection result is displayed. Perform image stabilization. On the other hand, if the detected voltage V is Vmin <V ≦ VB, only the determination result as to whether or not the blur correction is possible based on the detection result of the blur amount is displayed, and the optical blur correction is not performed.

The blur amount detection circuit 31 detects the blur amount of a photographed image on the exposure surface due to camera blur. As described later, the blur correction lens is composed of a pair of lenses 32 and 33 (hereinafter, referred to as blur correction lens) that are respectively displaceable in the X direction and the Y direction orthogonal to each other. The blur amount is detected in each of the X direction and the Y direction. The detected blur amount is input to the control unit 20, and the drive control values of the blur correction lenses 32 and 33 are calculated based on the blur amount.

FIG. 10 is a block diagram of the blur amount detection circuit.

In this embodiment, the battery voltage V is Vmin <
Even in the range of V ≦ VB, only the blur amount detection is performed. Therefore, in consideration of saving power consumption, the blur amount detection circuit 31 is configured by using the CCD area sensor. The blur amount detection circuit 31 shown in the figure is basically the same as the circuit disclosed in, for example, Japanese Patent Laid-Open No. 3-192228. Therefore, a detailed description will be omitted here, and a brief description will be given.

The shake amount detection circuit 31 includes an image pickup section 31A having a CCD area sensor 311, a correlation value calculation section 31B for calculating contrast values Cx and Cy in the X and Y directions and a correlation value C from the picked-up image, and this correlation. Value calculator 31
The shake amount calculator 31C calculates the shake amounts in the X and Y directions based on the calculation result in B.

The image pickup section 31A includes a CCD area sensor 31.
1, a signal processing circuit 312, an A / D converter 313, and an image memory 314. The CCD area sensor 311 is a sensor in the finder optical system described above, and is an image sensor that converts a subject light image into an electrical signal and captures the electrical signal. The CCD area sensor 311 is a color sensor,
It may be either a monochrome sensor. The signal processing circuit 312 performs signal processing such as level correction and noise removal of the light reception signal of each pixel output from the CCD area sensor 311. The A / D converter 313 converts the light receiving signal (analog signal) of each pixel into a digital signal (hereinafter referred to as pixel data).

The image memory 314 is a memory for storing image data (a group of pixel data forming an image) taken in by the CCD area sensor 311. Image memory 3
Reference numeral 14 denotes a standard part memory 314a having a storage capacity of one image data and a reference part memory 314b having the same storage capacity as the standard part memory 314a.
The image data of the reference image for blur amount detection (the image captured first in the blur amount detection process) is stored in the reference image memory 314b. Image data of a plurality of picked-up images periodically picked up in the detection process) are sequentially stored in an updated manner.

The correlation value calculator 31B is composed of a calculation circuit 315 for calculating the contrast values Cx and Cy in the X and Y directions and the correlation value C, and a memory 316 for storing the calculation result of the calculation circuit 315. Correlation value calculator 31
In calculating the correlation value C, B divides the captured image G into a plurality of small block images G (1) to G (n) as shown in FIG. 11, and divides each of the divided images G (1) to G ( Contrast values Cx (I) and Cy (I) in the X direction (horizontal direction) and Y direction (vertical direction) for each n)
(I = 1, 2, ... N) is calculated. Then, a predetermined number m (<n) of divided images for calculating the correlation value C in the X direction and the Y direction from these contrast values Cx (I) and Cy (I) are extracted. For example, for each of the 48 divided images G (1) to G (48), four divided images for the blur amount calculation in the X direction and the Y direction are extracted. Extraction of such divided images
This is a process for extracting a high-contrast portion of the captured image and detecting the blur amount with high precision using the partial image.

The contrast value Cx (I) in the X direction
Compares the reference image stored in the reference unit memory 314a with the reference image stored in the reference unit memory 314b shifted by one pixel pitch in the X direction, and determines the density difference (absolute value) at each pixel position. It is the total. Since the contrast value Cx increases as the density change of the captured image in the X direction increases, the contrast value Cx (I) is calculated for the image G (I) of each block, and the contrast value Cx is calculated.
By extracting a block having a large (I), a partial image having a large contrast in the X direction is extracted.

The calculation of the contrast value Cx (I) is performed using the image GR captured first at the start of blur detection. That is, the image data captured at the beginning of the blur detection is the standard portion memory 314a and the reference portion memory 314b.
Since the pixel data g (i, j) of each pixel position (i, j) is read from the reference unit memory 314a, the pixel position (i, j) is read from the reference unit memory 314b.
The pixel data g (i, j + 1) at the position (i, j + 1) which is shifted by one pixel in the X direction is read out, and both pixel data g (i, j), g
absolute value of level difference Δgx of (i, j + 1) | Δgx | = | g (i,
j) −g (i, j + 1) |

As for the contrast value Cy in the Y direction, the contrast value Cy (I) is calculated for the image G (I) of each block in the same manner as the contrast value Cx (I) in the X direction, and the contrast value Cy (I By extracting a block having a large), a partial image having a large contrast in the Y direction is extracted.

The correlation value C is determined by what direction and how much the image GS after a predetermined time t has passed with respect to the image GR at the beginning of the blurring amount, that is, the blurring direction and the blurring of the photographed image during the time t. This is data for calculating the amount. As for the deviation of the image GS from the image GR, an image GS ′ obtained by shifting the image GS by a predetermined amount (for example, one pixel pitch) in the X direction and the Y direction is compared with the image GR, and an image GS ′ that best matches the two images is obtained. It is calculated by

The correlation value C indicates the degree of coincidence between each image GS 'and the image GR, and is defined by the integrated value of the density difference (absolute value) at each pixel position, like the calculation of the contrast values Cx and Cy. To be done. As described above, among the captured images,
M divided images G (r) with high contrast extracted
Since the correlation value C is calculated only for (r = 1, 2, ... M), if the correlation value calculated for each divided image is C (r) (r = 1, 2, ... M). , The correlation value C is C
= C (1) + C (2) + ... C (m)

The correlation value C for an image GS 'shifted by k pixel pitch in the X direction and h pixel pitch in the Y direction is C (k,
h) and k = h = 0, ± 1, ± 2, 25 correlation values C (k, h) are obtained. C (0,0) is a correlation value when the image GR and the image GS are compared, and if there is no camera shake, the image GS is the same as the image GR, so C (0,0) = 0. Become.

On the other hand, if C (k, h) = 0, then assuming that the pixel pitch in the X direction is Px and the pixel pitch in the Y direction is Py, the image GS is k pixel pitches in the X direction and h in the Y direction. Since the image GS ′ shifted by the pixel pitch is the same as the image GR, the image GS ′ is diagonally inclined to the image GR by P (=
It can be seen that camera shake is caused by √ (Px2 + Py2)).

Therefore, 25 correlation values C (k, h) (k = h = 0, ± 1, ± 2) are calculated for the image GS,
By obtaining the shift position where the correlation value C (k, h) becomes the minimum, the blur direction and the blur amount of camera blur are calculated. In this case, when the minimum value of the correlation value C (k, h) is estimated to be at the intermediate position between pixels, the position is calculated by interpolation calculation, and the accurate blur amount (ξ
x, ξy) is calculated.

The arithmetic circuit 315 determines the contrast value C
Subtraction circuit 315a for calculating x (I), Cy (I) and correlation value C (k, h), absolute value circuit 315b, addition circuit 3
15c and a register 315d. Subtraction circuit 3
Reference numeral 15a denotes the pixel data g (i, j) of the standard image and the pixel data g of the reference image in the calculation of the contrast value Cx (I).
The level difference Δgx = g (i, j) −g (i, j + 1) from (i, j + 1) is
In the calculation of the contrast value Cy (I), the pixel data g (i, j) of the standard image and the pixel data g (i + 1,
j) and the level difference Δgy = g (i + 1, j) −g (i, j). In the calculation of the correlation value C (k, h), the pixel data g (i, j) of the standard image GR and the reference image G
Pixel data g (i + k, j +) of an image GS ′ obtained by shifting S in the X and Y directions by k pixel pitch and h pixel pitch, respectively.
The difference in level with h) is calculated as Δg = g (i + k, j + h) −g (i, j).

The absolute value circuit 315b is for calculating the absolute value of the level differences Δgx, Δgy, and Δg. The adder circuit 315c and the register 315d integrate the absolute values of Δgx, Δgy, and Δg at each pixel position to accumulate the contrast values Cx (I), Cy (I) and the correlation value C (k,
h) is calculated.

The memory 316 stores the contrast values Cx (I) and Cy in the X and Y directions calculated by the calculation circuit 315.
(I) and the correlation value C (k, h) are stored.

The blur amount calculator 31C reads the contrast values Cx (I) and Cy (I) in the X and Y directions from the memory 316 and extracts the divided images for the correlation value calculation. Further, the correlation value C calculated for each of the extracted divided images
An interpolation calculation is performed on (k, h) to obtain a correlation value C (k,
h) is the minimum shift position (X coordinate ξx, Y coordinate ξ
By calculating y), the blur direction and the blur amount are calculated. Information about this camera shake (blur direction and amount)
Is input to the control unit 20.

Returning to FIG. 9, the shake correction lens 32 is a shake correction lens for correcting shake in the X direction, and the shake correction lens 33 is a shake correction lens for correcting shake in the Y direction. Further, the shake correction motor control circuit 34
Is a circuit that controls the drive of the motor 341 that drives the shake correction lens 32, and is a shake correction motor control circuit 35.
Is a circuit that controls the drive of the motor 351 that drives the shake correction lens 33.

FIG. 12 is an exploded perspective view showing the structure of an optical system for blur correction.

An optical system for blur correction is provided at the tip of the taking lens 3. Lens holder 3 for taking lens 3
An annular recess 37a is provided at the front end of 7, and the shake correction lens 32 in the X direction and the shake correction lens 33 in the Y direction are respectively provided in the recess 37a in the X axis direction (in the plane orthogonal to the optical axis L). It is provided so as to be movable in the lateral direction of the camera body 2 and in the Y-axis direction (longitudinal direction of the camera body 2).

The X-direction blur correction lens 32 is provided with a cylindrical pin hole 381 and a tooth 382 facing each other on the peripheral edge, and a light projecting lens position detection light is provided in the vicinity of the pin hole 381. An annular holding frame 38 provided with an element 40
Held in. The Y-direction blur correction lens 33 is also held by a holding frame 39 having the same structure as the holding frame 38.

As shown in the figure, assuming the XY coordinates with the optical axis L as the origin, the concave portion 37a has + Y inside the concave portion 37a.
A pin 42 is provided at a proper position on the shaft, and the pin 42 is loosely fitted in the pin hole 381 of the holding frame 38 to mount the X-direction shake correction lens 32 in the recess 37a so as to be displaceable in the X-axis direction. ing. Further, a pin 43 is provided so as to project at a proper position on the + X axis in the recess 37a, and the pin 43 is loosely fitted in the pin hole 391 of the holding frame 39 to allow the shake correction lens 33 in the Y direction.
Are mounted in the recess 37a so as to be displaceable in the Y-axis direction.

In the lens holder 37, a drive gear 44 fixed to the drive shaft is projected at a proper position on the -Y axis in the concave portion 37a, and a motor 341 is arranged therein. The drive gear 44 holds the holding frame 38. Is meshed with the tooth portion 382 of the. Further, the drive gear 45 fixed to the drive shaft is projected at a proper position on the −X axis in the concave portion 37 a to dispose the motor 351. The drive gear 45 is meshed with the tooth portion 392 of the holding frame 39. .
Further, a light receiving element 46 is provided on the bottom surface of the concave portion 37a at a position facing the light projecting element 40 of the blur correction lens 32, and a light receiving element 47 is provided at a position facing the light projecting element 41 of the blur correcting lens 33. .

Shake correction lens 32 and shake correction lens 3
The lens 3 is mounted in the recess 37 so that it can be displaced in the X direction and the Y direction with the blur correction lens 32 inside, and is fixed by a retainer ring 48 so as not to protrude from the recess 37.

In the above structure, when the motor 341 is driven to rotate in the forward or reverse direction, the blur correction lens 32 rotates about the pin 42 in the clockwise or counterclockwise direction by a small angle, whereby the blur correction lens 32. The optical axis Lx is displaced in the ± X direction on the X axis with respect to the optical axis L, and shake correction in the X direction is performed. A light image having a striped pattern is projected from the light projecting element 40 toward the light receiving element 46, and position information (for example, from a reference position) of the shake correction lens 32 is determined by the light receiving position of the light image having the striped pattern on the light receiving element 46. The amount of displacement of the blur correction lens 32 is accurately controlled by feeding back this position information to the blur correction motor control circuit 34 of the motor 341.

Similarly, when the motor 351 is rotationally driven in the forward direction or the reverse direction, the shake correction lens 33 rotates about the pin 43 clockwise or counterclockwise by a small angle.
As a result, the optical axis Ly of the blur correction lens 33 is displaced in the ± Y direction on the Y axis with respect to the optical axis L, and blur correction in the Y direction is performed. A light image having a striped pattern is projected from the light projecting element 41 toward the light receiving element 47, and position information of the blur correction lens 33 is detected by the light receiving position of the light image having the striped pattern on the light receiving element 47. By feeding back the position information to the shake correction motor control circuit 35 of the motor 351, the displacement amount of the shake correction lens 33 is accurately controlled.

Returning to FIG. 9, the display control circuit 36 is a circuit for controlling the display of the display section 361 (see FIG. 3) provided in the finder. The display control circuit 36 includes the control unit 2
A predetermined display is performed in the display area A2 of the display unit 361 based on the control signal input from 0, the display data of the presence / absence of the shake correction and the availability of the shake correction. In addition, the display control circuit 36
Converts the data of the blur amount detection value and the blur correction remaining amount input from the control unit 20 into data of a predetermined level display, and the data is displayed in the display areas A3 and A4 of the display unit 361.
To display.

The switch SFL is a switch for detecting the operation of the operation button 12 for setting the flash emission mode, the switch SA is a switch for detecting the operation of the operation button 12 for setting the presence of the eye reduction, and the switch SB is a blur correction. This is a switch for detecting the operation of the mode setting button 9. The S1 switch and the S2 switch are switches for detecting a half-pressed state and a full-pressed state of the shutter button 8, respectively. The detection signals of the switches SFL, SA, SB, S1 switch and S2 switch are input to the control unit 20.

Next, a method of calculating the remaining shake correction amount (predicted value) after the shake correction in the shake correction remaining amount calculation unit 202 will be described. For the sake of convenience, the remaining shake correction amount in the X direction will be described.

FIG. 13 shows the X of the subject light image on the exposure surface.
It is a figure which shows the detected value of the amount of blurring of a direction. In the figure,
The horizontal axis represents the number of sampling times n, and the vertical axis represents the blur amount detection value D (n).

The basic principle for optically reducing the blur of the subject light image on the exposed surface is to detect the blur amount detection value D for the nth time.
(n) is the (n-2) th blurring amount detection value D (n-2) and (n-
1) Deviation ΔD (n-1) (= from the blur amount detection value D (n-1) at the first time
D (n-1) -D (n-2)) is assumed to be a value D (n) 'which is a deviation from the blur amount detection value D (n-1), and the (n-1) th blur amount detection is performed. Sometimes the image formation position of the subject light image on the exposure surface
By performing blur correction that shifts by ΔD (n-1), n
The deviation ΔD (n) between the blur amount detection value D (n) of the first time and the blur amount detection value D (n-1) of the (n−1) th time is reduced.

In FIG. 13, P1 is the n-th blurring amount detection value D (n) when there is no blurring correction, and P2 is
Is the blur amount detection value D (n) ′ assumed as the nth detection value at the time of detecting the (n−1) th blur amount. D (n) '= D
In the case of (n), if the blur correction of -ΔD (n-1) is performed at the (n-1) th time, the blur amount predicted value D (n) "predicted as the detected value at the nth time becomes D (n −1), no error occurs, but normally, the n-th blur amount detection value D (n) does not match the detection value D (n) ′, and as shown in FIG. If ′> D (n), the shake amount predicted value D (n) ″ at the nth time after shake correction
Is P3, and the error is (D (n) '-D (n)).

FIG. 14 is a diagram showing an example of a blur amount detection value (predicted value) when the blur correction is performed based on the above-described blur correction principle.

In the figure, the curved line is the blurring waveform of the subject light image when the blurring correction is not performed, and the curve is the blurring waveform of the subject light image estimated when the blurring correction is performed.

The blur amount detected by the blur amount detecting circuit 31 is detected by using the subject optical image on the image pickup surface of the CCD area sensor 311 which is not optically corrected for blur, and therefore the photographing lens 3 is used. Even if the shake correction is performed, the amount of shake is the amount without the shake correction.
Therefore, the curve shows the blur amount detection value D (n) detected by the blur amount detecting circuit 31.

On the other hand, since the blur amount of the subject optical image after the blur correction cannot be measured, the curve calculates the blur amount estimated when the blur correction is performed based on the above-mentioned blur correction principle. It is a thing. The curve is 2
This is a case where the blur correction is performed from the time when the blur amount is detected for the first time, and the blur correction is applied so as to cancel the deviation ΔD (n-1) at the time when the blur amount is detected for the (n-1) th time.
This is the case where (n-1) is shake-corrected without loss.

As shown in the figure, the blurring waveform estimated when the blurring correction is performed is the waveform of the differential coefficient of the curve which fluctuates around the position where the blurring correction is started.

By the way, when the blur of the subject light image is optically corrected, a loss occurs due to the response characteristics of the correcting lenses 32 and 33. Therefore, the deviation ΔD (n-1) is set to the blur correction control value F (n ) Is input to the blur correction motor control circuits 34 and 35 of the motors 341 and 351, the blur amount of the subject light image to be actually corrected (hereinafter, referred to as blur correction amount) F.
(n) 'is smaller than ΔD (n-1). Therefore, in reality, the shake waveform after shake correction does not show the curve shown in FIG.

The loss component E (n) is generally proportional to the square of the shake correction control value ΔD (n-1) that is input, so E (n) =
Assuming ΔD (n-1) 2 / α (α; coefficient), the actual blur correction amount F (n) ′ is F (n) ′ = F (n) −E (n) = ΔD (n−1) ) -ΔD (n-1) 2 / α. Therefore, the blur correction amount F (n) ′ and the deviation Δ
In order to reduce the difference from D (n-1), it is necessary to set the shake correction control value F (n) in consideration of the above loss E (n). Now, assuming that the deviation ΔD (n-1) is added to the loss E (n) times k to set the blur correction control value F (n), the blur correction amount F (n) 'is ) Becomes the formula.

[0097]

[Equation 1]

In the above equation (1), the second term is the loss component. Further, the coefficient α is a coefficient peculiar to the shake correction mechanism provided in the camera 1, and an appropriate value is set by an experiment or the like. The coefficient k is a coefficient that determines the feedback amount for compensating the mechanical loss, but is usually set to 1 or less so that the blur correction amount does not become excessive when the amplitude of the blur suddenly decreases. Is set.

The shake correction control value F for each sampling
When (n) is calculated and shake correction is performed with this shake correction control value F (n), the shake detection value for the nth time (that is, the shake correction remaining amount) D (n) ″ has no shake correction. In this case, the blur amount detection value D (n) and the blur correction amount integrated value S (n) up to the nth time
(= F (2) '+ F (3)' ... + F (n-1) '+ F (n)' = S (n-
1) + F (n) ') is estimated to be the error, so the following (3)
It can be calculated by a formula.

[0100]

[Equation 2]

Therefore, when the shake correction is performed with the shake correction control value F (n) expressed by the above formula (2), the shake correction residual amount D (n) ″ is calculated by the above formula (3). The calculation result is displayed in the display areas A3 and A4 of the display unit 361.

FIG. 15 is a diagram showing a simulation result of the blur correction remaining amount (predicted value) calculated by the above-described calculation method.

In the figure, the blur waveform of the subject light image due to camera blur is a sine wave, and the blur amount detection value D (n) without blur correction is D (n) = 100.sin (n ). Further, the simulation is performed with k = 0.8 and α = 50 and a sampling cycle of 1 °. Further, the curve indicated by the solid line indicates the blur amount detection value D (n) when there is no blur correction, the curve indicated by the alternate long and short dash line indicates the blur correction amount integrated value S (n), and the curve indicated by the dotted line indicates the blur correction. Remaining amount D (n) ″
Is shown. It should be noted that the reason why the blurring waveform is a sine wave is that the blurring waveform in a minute exposure time can be approximated to a sine wave.

Next, the display processing of the camera shake amount detection value and the camera shake correction remaining amount of the camera provided with the camera shake correction device according to the present invention will be described with reference to the flowcharts of FIGS.

FIG. 16 is a flowchart showing the first embodiment of the display processing of the blur amount detection value and the blur correction remaining amount. In the first embodiment, the shake correction mode setting button 9
When the shake correction mode is set by, the shake amount detection value D (n) detected by the shake amount detection circuit 31 is displayed on the display unit regardless of whether or not there is an instruction to prepare for shooting by half-pressing the shutter button 8. When the preparation for photographing is instructed by pressing the shutter button 8 halfway, the remaining amount of shake correction D (n) ″ is displayed on the display unit 361.
Are displayed in the display areas A3 and A4.

When the main switch 13 is pressed to turn on the abbreviated power switch SM and the camera 1 is started, it is determined whether or not the shake correction mode is set by the shake correction mode setting button 9 (# 2).

If the shake correction mode is set (# 2
YES), the subject brightness is detected by the photometric circuit 21 (# 4), and the detection of the amount of blur of the subject optical image is started by the blur amount detection circuit 31 in consideration of the detection result (# 6). Blur detection value D (n) detected in the cycle
Is the display area A3, A of the display unit 361 in the viewfinder.
No. 4 is displayed (# 8). On the other hand, if the shake correction mode is not set (NO in # 2), the above steps # 4 to
# 8 is skipped, and the blur amount detection and blur amount detection value D
(n) is not displayed.

Subsequently, it is judged whether or not the S1 switch is in the ON state by half-pressing the shutter button 8 (# 10), and if the S1 switch is in the OFF state (# 10).
If NO in step 10), the process returns to step # 2, and the detection of the blur amount and the display of the blur amount detection value D (n) are continued according to the setting state of the blur correction mode until the S1 switch is turned on (# 2). ~ # 10 loop).

When the S1 switch is turned on (# 10
YES), the photometric circuit 21 detects the subject brightness,
The exposure control value is set based on the subject brightness (# 12), the subject distance is detected by the distance measuring circuit 22, and the AF control value of the taking lens 3 is calculated based on the subject distance (# 14).

Subsequently, it is judged whether or not the shake correction mode is set (# 16). When the shake correction mode is set (YES in # 16), the control unit 20 detects the shake amount detection value D ( The remaining blur correction amount D (n) ″ is calculated by a predetermined arithmetic expression using (n) (# 18), and the remaining blur correction amount D (n) ″ is displayed in the display areas A3 and A4 of the display unit 361 in the viewfinder. Is displayed on the screen (# 20). On the other hand, if the blur correction mode is not set (NO in # 16), steps # 18 and # 20 are skipped, and the blur correction remaining amount D (n) ″ is not calculated and the calculation result is not displayed. .

Subsequently, it is determined whether or not the S2 switch is in the on state by fully pressing the shutter button 8 (# 22), and if the S2 switch is in the on state (YES in # 24), Then, the process proceeds to step # 26, and the exposure control process is performed. On the other hand, if the S2 switch is off (NO in # 24), it is determined whether or not the S1 switch continues to be on (# 24), and if the S1 switch is off (NO in # 24). ), Step # 4
If the S1 switch continues to be turned on ((#
(YES in step 24), the process returns to step # 16, and the remaining shake correction amount D (n) ″ is calculated according to the setting state of the shake correction mode until the S2 switch is turned on or the S1 switch is turned off. And the display of the calculation result is continued (loop of # 16 to # 24).

When the process proceeds to step # 26, step #
A of the taking lens 3 based on the AF control value set in 14.
F control is performed. Subsequently, the setting state of the shake correction mode is determined (# 28), and when the shake correction mode is held (YES in # 28), the shake correction operation is started (# 30). That is, the shake correction lens 32 in the X direction is driven in the X direction based on the shake amount ξx of the captured image in the X direction detected by the shake amount detection circuit 31.
The shake correction lens 33 in the Y direction is driven in the Y direction based on the shake amount ξy of the captured image in the Y direction, and the shake amounts ξx and ξy of the subject light image on the exposure surface are canceled. And
When the shake correction lenses 32 and 33 are stably driven to enable shake correction shooting (# 32), the lens shutter 29 is driven to shoot (# 34).

When the shake correction mode is canceled (NO in # 28), steps # 30 and # 32 are skipped, and shooting is performed without performing the shake correction operation (# 34). Then, the shake correction operation is stopped (#
36), after the film is wound up by one frame (# 3
8) Then, the process returns to step # 2 for the next shooting.

FIG. 17 is a flow chart showing a second embodiment of the display processing of the blur amount detection value and the blur correction remaining amount. In the flowchart shown in FIG. 17, step # 16 is deleted from the flowchart of FIG. 16, and the calculation and display processing of the remaining shake correction amount D (n) ″ in step # 18 and step # 20 is performed in step # 31-1, # 31-2
Is moved between step # 30 and step # 32.

In the second embodiment, when the shake correction mode is set by the shake correction mode setting button 9,
Regardless of whether or not there is a shooting preparation instruction by half-pressing the shutter button 8, the blur amount detection value D (n) detected by the blur amount detecting circuit 31 is displayed on the display areas A3 and A of the display unit 361.
4 is displayed, and when the shooting is instructed by fully pressing the shutter button 8, the remaining amount of shake correction D (n) ″ is displayed on the display unit 36.
It is displayed in the first display area A3, A4. Second
The second embodiment is different from the first embodiment in that the blur correction remaining amount D (n) ″ is displayed during shooting preparation, whereas the blur correction remaining amount D (n) ″ is displayed during shooting.

In the first embodiment, it is possible to confirm the predicted value of the blur correction effect with respect to the camera blur state by pressing the S1 switch halfway (preparing for shooting). Although it can be surely determined whether or not it depends on the function, in the second embodiment,
Since the predicted value of the blur correction effect is displayed during shooting, there is an advantage that it is possible to accurately confirm the influence of camera shake on the current photograph (that is, the image quality deterioration due to camera shake).

FIG. 18 is a flow chart showing the third embodiment of the display processing of the blur amount detection value and the blur correction remaining amount. The flowchart shown in FIG. 18 is obtained by moving the processes of steps # 10 to # 14 to steps # 1-1 to # 1-3 before step # 2 in the flowchart of FIG.

In the third embodiment, when the preparation for photographing is instructed by half-pressing the shutter button 8, the blur amount detection value D (n) detected by the blur amount detecting circuit 31 is displayed on the display unit 361. When the images are displayed in the areas A3 and A4 and the photographing is instructed by the full-press operation of the shutter button 8, the remaining blur correction amount D (n) ″ is displayed in the display areas A3 and A4 of the display unit 361.
Is to be displayed. In the third embodiment, regardless of the operation of the shutter button 8, if the shake correction mode is set, the shake amount detection value D (n) is displayed. The difference is that the blur amount detection value D (n) is not displayed unless the push operation is performed.

In the third embodiment, the blur amount detection value D (n)
Is not detected and displayed unnecessarily after the shooting state and the display thereof are set in the shooting mode, which contributes to power saving.

FIG. 19 is a flow chart showing the fourth embodiment of the display processing of the blur amount detection value and the blur correction remaining amount. The flowchart shown in FIG. 19 is the same as the flowchart of FIG. 18 except that the processes of steps # 31-1 and # 31-2 are changed to steps # 9-1 and # 9-2.
Between step # 22 and step # 22.

In the fourth embodiment, when the preparation for photographing is instructed by half-pressing the shutter button 8, the blur amount detection value D (n) detected by the blur amount detecting circuit 31 is displayed on the display unit 361. The remaining amount of shake correction D (n) ″ is displayed in the areas A3 and A4, and the display area A of the display unit 361 is displayed.
3 and A4. In the fourth embodiment, S1
With the switch half-pressed (while shooting is in progress), you can compare and confirm the camera shake state and the predicted value of the shake correction effect on it, so you can reliably judge the effect of the shake correction function. There is.

By the way, in flash photography in the red-eye reduction mode, the built-in flash 7 for reducing red-eye is used.
There is a certain time lag from when the shutter button 8 gives a release instruction by the pre-emission and the time when the opening / closing operation of the lens shutter 29 is actually started. In this case, if the shake correction is further performed, the remaining shake correction amount D (n) ″
The time lag is further increased due to the calculation and the display thereof and the stabilization of the drive of the shake correction lenses 32 and 33, and it becomes difficult to match the photographing timing. Therefore, in the camera 1, as shown in FIG. 20, the shake correction operation and the calculation of the shake correction remaining amount D (n) ″ are started at the same time when the preflash of the built-in flash 7 is started.
It is designed to stabilize the shake correction during the pre-flash of.

21 and 22 are flowcharts of control relating to blur correction processing in flash photography in the red eye reduction mode.

In flash photography in the red-eye reduction mode, when the camera 1 is activated and the S1 switch is turned on (YES in # 40), is the blur compensation mode set by the blur compensation mode setting button 9 subsequently? It is determined whether or not (# 42).

If the shake correction mode is set (# 4
2 is YES), the subject brightness is detected by the photometry circuit 21 (# 44), and the blur amount detection circuit 31 starts detecting the blur amount of the subject light image in consideration of the detection result (# 46). The blur amount detection value D (n) detected in a predetermined cycle is displayed in the display area A of the display unit 361 in the viewfinder.
3 and A4 are displayed (# 48). On the other hand, if the shake correction mode is not set (NO in # 42), steps # 44 to # 48 are skipped, and the shake amount detection and the shake amount detection value D (n) are not displayed.

Subsequently, the photometric circuit 21 detects the subject brightness, the exposure control value is set based on the subject brightness (# 50), the range finding circuit 22 detects the subject distance, and based on the subject distance. AF of taking lens 3
The control value is calculated (# 52). Subsequently, it is determined whether or not the built-in flash 7 is required to emit light based on the result of photometry and the flash emission mode setting state (# 54). If flash emission is required (YES in # 54), the flash emission amount is determined. Is calculated (# 56), and then the release standby state is set (loop of # 58 and # 60). On the other hand, if the flash emission is unnecessary (YES in # 54), # 56 is skipped and the release standby state is set (loop of # 58 and # 60).

When the S1 switch is turned off in the release standby state (NO in # 60), the process returns to step # 40, and when the S2 switch is turned on (YE in # 58).
S), AF control of the taking lens 3 is performed based on the AF control value set in step # 52 (# 62). Subsequently, it is determined whether or not pre-light emission is necessary to prevent red eye (# 6
4) If pre-flash is required (YES in # 64), pre-flash of the built-in flash 7 is started (# 66), and if pre-flash is not required (NO in # 64), step # 66.
Skipping and skipping the preflash of the built-in flash 7.

Subsequently, it is judged whether or not the shake correction mode is set (# 68). If the shake correction mode is set (YES in # 68), the shake correction operation is started (# 68). 70), the control unit 20 uses the shake amount detection value D (n) to calculate a shake correction remaining amount D by a predetermined arithmetic expression.
(n) ″ is calculated (# 72), and this shake correction remaining amount D
(n) ″ is the display area A of the display unit 361 in the viewfinder.
3 and A4 (# 74). Next, when the shake correction lenses 32 and 33 are stably driven and shake correction photography is possible (# 76), and when the preflash of the built-in flash 7 is completed (# 78), the opening operation of the lens shutter 29 is started. (# 80).

On the other hand, if the shake correction mode is not set (NO in # 68), the above steps # 70 to # 76 are skipped, and the shake correction operation and the shake correction remaining amount D (n) "are performed.
Is not displayed and the calculation result is not displayed.
When the preflash of the built-in flash 7 is completed (# 78),
The opening operation of the lens shutter 29 is started (# 80).

Then, if flash light emission is required (YES in # 82), the main flash 7 is mainly emitted at a predetermined timing (# 84), and then the lens shutter 29 is closed (#). 86), whereby the exposure control ends.

Subsequently, the blur correction operation is stopped and the lens positions of the blur correction lenses 32 and 33 are reset (# 88), and after the film is wound up by one frame (# 88).
90) and returns to step # 2 to perform the next shooting.

As described above, since the shake correction operation is started at the same time as the preflash of the built-in flash 7 is started and the shake correction operation is stabilized during the preflash, the exposure control is immediately performed at the end of the preflash. Therefore, the time lag from the release instruction to the start of exposure control can be reduced as much as possible.

[0133]

As described above, according to the present invention,
In a blur correction device or a camera that detects information on the blur of the subject image and optically corrects the blur of the subject image based on the detection result, the information after the blur correction is performed by using the information on the detected blur of the subject image. Since the predicted value of the blur correction remaining amount of the subject image is calculated and the calculation result is displayed, the effect of the blur correction function on the blur can be visually recognized. As a result, it is possible to easily determine whether or not the anti-shake measure is necessary, and it is possible to surely take an appropriate anti-shake measure as necessary.

Further, in addition to the display of the predicted value of the remaining amount of blur correction after the blur correction, the information on the blur of the detected subject image is also displayed. Therefore, by comparing the two, the blur correction effect can be further improved. You can see clearly.

Further, since the predicted value of the residual blur correction amount after the blur correction and the information regarding the blur are displayed by using one display unit, the display member can be reduced and the residual blur correction can be performed. It becomes easier to compare the predicted value of the amount with the information on the blur, and it becomes easier to grasp the blur correction effect.

[Brief description of drawings]

FIG. 1 is a front perspective view showing the outer appearance of a camera including a shake correction device according to the present invention.

FIG. 2 is a rear view showing the outer appearance of a camera provided with the shake correction device according to the present invention.

FIG. 3 is a diagram showing an example of a display unit in a finder.

FIG. 4 is a diagram showing a configuration of level display.

FIG. 5 is a diagram showing a method of displaying a blur amount detection value and a blur correction remaining amount, in which (a) shows a level display of the blur amount;
(B) is a diagram in which the blur amount is displayed as a peak value.

FIG. 6 is a diagram in which a blur amount detection value and a blur correction remaining amount are simultaneously displayed as peak values in the same display area.

FIG. 7 is a diagram showing another configuration of level display.

8A and 8B are views showing a method of displaying a blur amount detection value and a blur correction remaining amount in another level display, wherein FIG. 8A is a diagram showing a blur amount in a level, and FIG. 8B is a diagram showing a blur amount as a peak value. Is.

FIG. 9 is a block configuration diagram of a camera including a shake correction device according to the present invention.

FIG. 10 is a block configuration diagram of a blur amount detection circuit.

FIG. 11 is a diagram showing a divided image of small blocks provided in a captured image.

FIG. 12 is an exploded perspective view showing the structure of an optical system for blur correction.

FIG. 13 is a diagram for explaining a basic principle of optically reducing blur of a subject light image on an exposure surface.

FIG. 14 is a diagram showing an example of a blur amount detection value (predicted value) when blur correction is performed based on the blur correction principle.

FIG. 15 is a diagram showing a simulation result of a remaining amount of shake correction after shake correction.

FIG. 16 is a flowchart showing a first embodiment of a display process of a blur amount detection value and a blur correction remaining amount of a camera equipped with the blur correction device according to the present invention.

FIG. 17 is a flow chart showing a second embodiment of a display process of a blur amount detection value and a blur correction remaining amount of a camera equipped with the blur correction device according to the present invention.

FIG. 18 is a flowchart showing a second embodiment of a display process of a blur amount detection value and a blur correction remaining amount of a camera equipped with the blur correction device according to the present invention.

FIG. 19 is a flowchart showing a second embodiment of a display process of a blur amount detection value and a blur correction remaining amount of a camera including a blur correction device according to the present invention.

FIG. 20 is a time chart showing a blur correction process in flash photography in a red-eye reduction mode of a camera equipped with the blur correction device according to the present invention.

FIG. 21 is a flowchart of control relating to blur correction processing in flash photography in a red-eye reduction mode of a camera including the blur correction device according to the present invention.

FIG. 22 is a flowchart of control relating to blur correction processing in flash photography in a red-eye reduction mode of a camera equipped with the blur correction device according to the present invention.

[Explanation of symbols]

1 camera 2 camera body 3 taking lens 4 metering window 5 ranging window 6 viewfinder objective window 7 built-in flash 8 shutter button 9 image stabilization mode setting button 10 viewfinder eyepiece window 11 LCD display 12 operation button 13 main switch 14 zoom switch 15 battery Storage room 20 Control unit 201 Shake correction control value calculation unit 202 Shake correction remaining amount calculation unit (calculation means) 203 Memory 21 Photometric circuit 22 Distance measuring circuit 23 FL emission control circuit 24 Z motor control circuit 25 Zoom lens 26 AF motor control circuit 27 Focus Lens 28 Aperture / Shutter Control Circuit 29 Lens Shutter 30 Voltage Detection Circuit 31 Blur Amount Detection Circuits 32, 33 Blur Correction Lenses 34, 35 Blur Correction Motor Control Circuits 341, 351 Motor 36 Display Control Circuit 361 Display Section Quantity display means Shake information display means) 37 lens holder 39 holding frame 40, 41 light emitting devices 42 and 43 pins 44, 45 driven gear 46, 47 light-receiving element 48 pressing ring E power battery SFL, SA, SB, S1, S2 Switch

─────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-7-120801 (JP, A) JP-A-2-126251 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) G03B 5/00 G02B 27/64 G03B 17/18 G03B 17/20

Claims (6)

(57) [Claims] 1. Information about blurring of a subject image is detected,
In a blur correction device that optically corrects the blur of the subject image based on the detection result, a predicted value of the remaining blur compensation amount of the subject image after the blur correction is performed by using information about the detected blur of the subject image. Computing means for computing
An image stabilization device, comprising: an image stabilization remaining amount display means for displaying a calculated predicted value of the image stabilization remaining amount. 2. The blur correction device according to claim 1,
A blur correction device comprising blur information display means for displaying information on the detected blur of the subject image. 3. The blur correction device according to claim 2,
A blur correction device, wherein the blur correction remaining amount display means and the blur information display means both function as one display unit. 4. Information regarding blurring of a subject image is detected,
Based on this detection result, the optical correction of the blur of the subject image is performed.
In a camera that performs positive correction, the detected subject image
Using the information about blurring,
A calculation means for calculating the predicted value of the remaining shake correction amount
Remaining blur compensation amount that displays the estimated remaining blur compensation amount
A camera provided with a display means. 5. The camera according to claim 4, wherein
Blur information that displays information related to the blur of the subject image
A camera provided with information display means. 6. The camera according to claim 5, wherein:
The correction remaining amount display means and the blur information display means are
A camera characterized in that it also serves as a display section.