JPH08171116A - Camera capable of confirming its shake - Google Patents

Abstract

PURPOSE: To provide a camera capable of confirming its shake which can give an actual feeling of camera shaking to a photographer, when the camera shaking occurs during exposure. CONSTITUTION: In the camera capable of correcting the camera shaking at the time of photographing by a gimbal mechanism 13, angular velocity sensors for X-axis and Y-axis 1 and 2 for detecting the camera shaking on two axes orthogonally crossing each other in the camera and an external data memory 15 storing information on the camera shaking detected by the angular velocity sensors for the X- and Y-axes 1 and 2 are provided and then, the gimbal mechanism 13 corrects the camera shaking occurring at present in accordance with the operation input of a replay switch 17 and driven by the camera shaking information stored in the external data memory 15, to reproduce a camera shaking state in the previous photographing. Thus, the camera capable of confirming its shaking can be provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera capable of confirming camera shake, and more particularly to a camera capable of camera shake confirmation capable of correcting camera shake during photographing.

[0002]

2. Description of the Related Art Hitherto, various cameras have been proposed as cameras capable of confirming the blurring that occurs in a camera capable of correcting the blurring during photographing.

As an example of such a camera, for example, in Japanese Unexamined Patent Application Publication No. 1-132219, the state of camera shake is superposed and displayed in a viewfinder so that the subject is observed and at the same time the camera shake is photographed. What can be visually confirmed by the person is described.

Further, Japanese Patent Laid-Open No. 55-84925 discloses a technical means for displaying whether or not a photograph is blurred due to camera shake. This display is performed especially after photographing, but also before photographing. Is able to.

[0005]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
With the one described in Japanese Patent No. 219, it is rather easy to observe the amount of blurring observed by the viewfinder simply by superimposing the trajectory of the blurring within a short time of exposure time (at the same time as the shooting). However, there is a problem in that the photographer does not actually feel that the image is blurred.

Further, in the above-mentioned Japanese Patent Laid-Open Publication No. 55-84925, the fact that a blur has occurred is mainly displayed after photographing, but how much the blur is and how it is blurred It is difficult to confirm that it is true.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a camera capable of confirming a blur when a blur occurs during exposure so that the photographer can feel the blur. There is.

[0008]

In order to achieve the above object, a camera capable of confirming a blur according to claim 1 of the present invention relates to two orthogonal axes of the camera in a camera capable of correcting a blur at the time of photographing. A pair of shake sensor means for detecting shake, a storage means for storing shake information detected by the shake sensor means, and a shake notification means for notifying the photographer of the shake information stored according to an operation input. Is equipped with.

A camera capable of confirming a blur according to a second aspect of the present invention is the camera according to the first aspect, wherein the blur notification means visually displays a trajectory of the blur in the viewfinder of the camera.

Further, in the camera capable of confirming the blur according to claim 3 of the present invention, the blur notifying means announces the presence of the blur of a predetermined value or more by a sound.

[0011]

In the camera capable of confirming the blur according to claim 1 of the present invention, the camera is capable of correcting the blur at the time of photographing, and the pair of blur sensor means detects and stores the blur about the two axes orthogonal to each other. The means stores the blur information detected by the blur sensor means, and the blur notification means notifies the photographer of the stored blur information in response to an operation input.

Further, in the camera capable of confirming the blur according to claim 2 of the present invention, the blur notifying means visually displays the trajectory of the blur in the viewfinder of the camera.

Further, in the camera capable of confirming blurring according to claim 3 of the present invention, the blurring notifying means notifies the presence of blurring of a predetermined value or more by sound.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 11 show a first embodiment of the present invention, and FIG. 1 is a block diagram showing the configuration of a camera capable of confirming blurring according to this embodiment.

As shown in FIG. 1, the camera capable of confirming blurring according to the present embodiment has an X-axis angular velocity sensor 1 which is a blurring sensor means for detecting blurring around the X-axis of the camera, and similarly, a camera around the Y-axis. A band-pass filter (band-pass filter) that outputs only a signal component in a frequency range determined from the shake waveform input from the Y-axis angular velocity sensor 2 that is a shake sensor unit that detects a shake and the X-axis angular velocity sensor 1 ) (Hereinafter referred to as BPF) 3 and this B.P. P. F
As in the case of No. 3, B. B. which outputs only the signal component within the frequency range determined from the shake waveform input from the Y-axis angular velocity sensor 2. P. F4 and B. P. An analog-to-digital converter (hereinafter referred to as A / D) that converts the analog output from F3 and 4 to digital and outputs it
5, a digital-analog converter (hereinafter referred to as D / A) 6 for converting digital data into an analog signal by the inverse of A / D 5, and actuators 11 and 12 to be described later so as to eliminate blur on the film surface. Shake canceling circuits 7 and 8 for respectively outputting signals to B. P.
An adding circuit 9 for adding the output of F3 and the output of the shake canceling circuit 7 and outputting the sum; P. An adder circuit 10 for adding the output of F4 and the output of the shake cancellation circuit 8 and outputting
An actuator 11 such as a motor driven by a signal output from the adder circuit 9 and an actuator 1 such as a motor driven based on the output of the adder circuit 10.
2, a gimbal mechanism 13 having a lens rotated by these actuators 11 and 12, a recording circuit 14 for recording the digital data output from the A / D 5 in an external data memory, and an RA for recording the data.
An external data memory 15 as a storage means for M and the like, and a reproducing circuit 16 for reading data from the external data memory 15 and outputting it as digital data to the D / A 6.
And a replay switch 17 that is pressed when the photographer requests replay (redisplay of blurring) and a release switch 18 that is pressed when the photographer releases the shutter of the camera.
Based on the exposure start signal 19 output when the camera opens the shutter, the replay switch 17, the release switch 18, and the exposure start signal 19, the recording circuit 14,
It is configured to have a CPU 20 as an arithmetic processing means for outputting a control signal to the reproducing circuit 16 and the like and performing various arithmetic operations.

Next, the operation of such a camera capable of confirming the blur will be described.

First, the X-axis angular velocity sensor 1 is used to measure the X-axis of the camera.
When a shake around the axis is detected and output, B.I. P. F3
Is input to This B. P. At F3, the DC component (direct current component) is cut from the frequency output by the X-axis angular velocity sensor 1, and the noise is removed by further cutting the component having a frequency of 20 Hz or more, and the result is output as a camera shake signal. To do.

The output noise-free camera shake signal is input to the shake canceling circuit 7. In this shake cancellation circuit 7,
Finally, the lens of the gimbal mechanism 13 is moved to convert the signal so that the blur stops. More specifically, a shake signal is received, and how much signal should be sent to the actuator 11 to calculate how well the gimbal mechanism works to properly correct the shake. Then, the result is output.

The signal output from the blur cancellation circuit 7 is input to the adder circuit 9. On the other hand, the output of the D / A 6 is also input to the adder circuit 9. The adder circuit 9 outputs the result of adding the above two signals to an actuator 11 such as a motor.

The actuator 11 has a gimbal mechanism 13 in real time based on the output signal of the adder circuit 9.
Drive.

The gimbal mechanism 13 is rotatably driven around the X axis by the actuator 11 so that the shake around the X axis is corrected. The X-axis and Y-axis directions are the camera directions,
For example, the direction is as shown in FIG.

The operation about the Y axis is similar to the operation about the X axis described above. That is, in the operation of correcting the shake around the Y axis, the output of the Y-axis angular velocity sensor 2 is set to B.A. P.
Enter in F4, P. The output of F4 is input to the shake canceling circuit 8, and the adder circuit 10 inputs the output of the shake canceling circuit 8 and the output of D / A6 and outputs a signal obtained by adding both signals to the actuator 12.

The actuator 12 is driven based on the signal from the adder circuit 10, and the result is transmitted to the gimbal mechanism 13 to correct the shake around the Y axis.

Next, the operation of the camera capable of confirming the blurring will be described centering on the CPU 20. First, the CPU 20
If the exposure start signal 19 is input to the CPU 2,
0 outputs a signal to cause the recording circuit 14 to record the blur data.

When the recording circuit 14 receives a signal from the CPU 20, the recording circuit 14 outputs the B. P. The shake data around the X axis and the shake data around the Y axis are input from the A / D 5 that has obtained the outputs of F3 and 4. Here, what is performed via the A / D 5 is that the shake data around the X axis and around the Y axis output as analog
This is because I want to record it as a digital value.

When the output of the A / D 5 is monitored, the recording circuit 14 causes the external data memory 15 including a RAM or the like to sequentially record the blur data. This data record is CP
The process is repeated until the recording end signal is output from U20.

Next, the reproducing circuit will be described. First,
Prior to the description, as the current state, it is assumed that the blur data that can be viewed by replay through the recording circuit 14 is stored in the external data memory 15.

When the reproduction signal of the shake data is sent from the CPU 20, the reproduction circuit 16 receives the external data memory 15
Both the shake data about the X axis and the shake data about the Y axis recorded as described above are input.

Then, the reproducing circuit 16 outputs the input result to the D / A 6. The D / A 6 outputs the input shake data around the X axis and the shake data around the Y axis to the adder circuits 9 and 10, respectively.

Here, the adder circuits 9 and 1 are connected via the D / A 6.
In the reproduction circuit 16, the data read out from the external data memory 15 is digital, whereas in the addition circuits 9 and 10, analog conversion is performed, so that such conversion is necessary. Because.

Next, the case where the replay switch 17 is pressed will be described in more detail. Here again, it is assumed that the shake data to be replayed by the recording circuit 14 is stored in the external data memory 15.

First, FIG. 2 is a sectional view of the single-lens reflex type camera 32 taken along the optical axis.

As shown in the figure, the light flux from the subject passes through the lens group 33 and the gimbal mechanism 13 when not exposed.
After passing through, the light is reflected upward by the quick return mirror 34, further reflected backward by the mirror 35, and then guided to the eye of the photographer through a finder optical system (not shown).

On the other hand, at the time of exposure, the quick return mirror 34 is flipped up so that the subject light flux reaches the film 36 to expose the subject image.

If the camera 32 is held by hand, for example, and the camera shakes, and the camera is not shake-corrected by the gimbal mechanism 13, the subject naturally appears to be blurred through the viewfinder.

For example, as shown in FIGS. 3 and 4, the displacement of the generated blur is displaced by x in the X-axis direction and is not displaced in the Y-axis direction at all from time 0 to time t. To do.

At this time, as shown in FIG. 6, if there is a point light source 39 at the center, it is possible to confirm in the finder 38 that the point light source 39 moves by x in the X direction. Of course, as shown in FIG. 5, it is a time when the gimbal mechanism 13 is not moved to perform the shake correction.

Next, in order to see how much blurring has occurred in the previous photographing in the state where such blurring is currently occurring, the recorded blur data is reproduced and the adding circuit 9, Consider the case where 10 is entered.

For example, if the recorded shake data in the X-axis direction and the shake data in the Y-axis direction are as shown in FIGS. 9 and 10, respectively, simply by reproducing these data, the adder circuit 9 will be described. , 10 is added, and in this case, the blur currently occurring (that is,
In the above case, the blurring recorded as the blurring in the X direction as shown in FIG. 6) is combined and is displayed on the finder.

Therefore, the blur seen in the viewfinder is
At present, it is difficult to judge whether it is a hand-held blur or a blur recorded at the previous shooting. In this way, it is necessary to correct the shake that is currently occurring in the hand.

Therefore, as shown in FIGS. 7 and 8, the gimbal mechanism 13 is rotated only around the Y axis to correct the camera shake in the X direction that is currently occurring, and then the recorded shake data is recorded. Are added by the adder circuits 9 and 10.
As a result, the gimbal mechanism 13 is driven only on the basis of the recorded blur data, and it becomes possible to confirm only the previous blur state with the finder.

In this way, by driving the gimbal mechanism 13 for correcting the blur based on only the recorded blur data, it can be used as a means for confirming the blur after photographing.

Next, the operation of this embodiment will be described with reference to FIG. First, the CPU 20 determines whether or not the power switch is off, that is, whether or not the power of the camera is turned off (step S1), and if the power of the camera is off, the process ends.

When the power of the camera is turned on, the CPU 20 determines whether the replay switch 17 has been pressed and turned on (step S2).

If the replay switch 17 is not turned on, the CPU 20 determines whether or not the exposure of the camera is started by the exposure start signal 19 (step S).
3) If the exposure has not started, the above step S1
Return to

On the other hand, when the exposure is started, the output from the D / A 6 is cut in the adder circuits 9 and 10 of FIG. 1 in order to perform the blur correction during the exposure. That is, the D
The CPU 20 transmits a signal for outputting "0" to the reproducing circuit 16 so that zero is output from / A6 (step S4).

Then, in order to record the blurring data during exposure in the external data memory 15, the CPU 20
A signal for recording is output to the recording circuit 14 (step S5).

Next, the CPU 20 determines whether or not the exposure is completed (step S6), and if the exposure is not completed, waits until the exposure is completed.

When it is confirmed in step S6 that the exposure has been completed, the CPU 20 sends a recording end signal to the recording circuit 14 (step S7) in order to end the recording of the blur data (step S7), and then in step S1. Return.

When the replay switch 17 is pressed in step S2, it is determined whether or not the shake data for replay is recorded in the external data memory 15 (step S8).

When the blur data is not recorded, the character "NO" meaning that there is no blur data is displayed on the display (step S9), and the process goes to step S3.

In addition, in step S8, if the blur data is recorded, the blur data is displayed in response to the request for replay. Therefore, during this period, the exposure is not performed, so the CPU 20 A release lock signal is output so as to lock the release switch 18 of the camera (step S10).

Then, since the blurring is displayed by replay, the character "OK" is displayed on the display unit prior to the display of the blurring (step S11).

Subsequently, in order to reproduce the blur data recorded in the external data memory 15, the CPU 20
A reproduction request signal is transmitted to the reproduction circuit 16 (step S1).
2).

Reproducing circuit 16 which has received this reproducing request signal
Reproduces and sends the shake data, corrects the shake that is currently occurring by driving the gimbal mechanism 13 as described above, and drives the gimbal mechanism 13 by the reproduced shake data to obtain the previous shake. Reproduce the blur when shooting.

Then, the CPU 20 determines whether or not the reproduction of the blur data has been completed (step S13). If the reproduction has not been completed, the CPU 20 waits until the reproduction is completed.

When the reproduction is completed, the replay operation is completed. Therefore, in order to accept the operation of the camera again, the release lock of the camera performed in step S10 is released (step S1).
4). After that, the process returns to step S1 to perform a series of operations.

According to the first embodiment described above, when the replay switch is pressed, based on the blur data taken last time, in the viewfinder or the like, the blurring condition during photography is the same as when it actually moves. As it is reproduced as it is,
You can check the blur intuitively.

Furthermore, since it is possible to confirm the size of the blur after the exposure, it is possible to make a post-confirmation by determining whether or not the photographed image is a blurred photograph. If the photograph is a blurred photograph, it can be confirmed again. You can give the opportunity to take a picture again.

Next, FIGS. 12 to 14 show a second embodiment of the present invention, and FIG. 12 is a block diagram showing a part of the structure of a camera capable of confirming blur. Note that, in FIG. 12, the portions similar to those in FIG. 1 are not shown.

In the second embodiment, as shown in FIG. 12, the blurring data stored in the external data memory 15 is input to the blurring amount calculating means 30, and the blurring notifying means based on the calculation result. The shake amount display means 31 is configured to notify the photographer of the shake. The blur amount display means 31 is controlled by the CPU 20.

The shake amount calculation means 30 and the shake amount display means 31 as described above perform the following operations.

That is, the blur amount calculating means 30 first
The blur data recorded in the external data memory 15 such as a RAM is read, and the data is converted and output so that the blur amount can be displayed on the blur amount display means 31.

The shake amount display means 31 inputs the output of the shake amount calculation means 30 and displays the result. Specifically, when the display request signal is output from the CPU 20, the blur display unit 31 inputs and displays the blur amount to be displayed from the blur amount calculation unit 30.

Next, the calculation performed by the blur amount calculating means 30 will be described. External data memory 15
Outputs the outputs of the X-axis and Y-axis angular velocity sensors 1 and 2 shown in FIG. 1 as they are, the external data memory 1
The shake amount calculating means 30 which has received the output of 5 performs a calculation for converting to the displacement of shake.

The calculation to restore this displacement is performed by the following equation. X = θv · f (1) where X is displacement, θv is angular velocity, and f is focal length.

Based on the data indicating the displacement of the blur calculated by using the equation (1), the blur amount display means 31 displays it so that the movement amount actually moved during the exposure can be confirmed.

Next, the blur amount display means 31 of this embodiment
Is, for example, a transmissive LC provided in the finder 21.
As shown in FIG. 13D, various images can be displayed by superimposing an image as shown in FIG. 13 on the subject image.

That is, FIG. 13 shows a state in which the trajectory of the blur is superimposed in the finder 21. As shown in the figure, a trajectory S of blurring starting from point P and ending at point Q is superimposed on the viewfinder 21.

By displaying the trajectory of the blur in the finder 21 in a superimposed manner as described above, it is possible to simultaneously confirm the blur in real time while observing the subject.

This display is displayed by the finder 21 as described above.
The display panel 2 such as an LCD provided on the back cover 27 of the camera 25, as shown in FIG.
It does not matter if it is displayed in 8. A release button 26 having the release switch 18 (see FIG. 1) therein is provided on the upper surface of the camera 25.

Recording and displaying of blur data may be performed before exposure or after exposure, and the present invention is not limited to this.

According to the second embodiment as described above, the same effect as that of the first embodiment can be obtained, and the blur at the time of photographing can be displayed by the locus, so that the photographer can easily make the blur. It has the advantage that it can be confirmed in real time.

FIG. 15 shows a third embodiment of the present invention. In the third embodiment, as shown in FIG. 15, the blurring amount is further displayed graphically.

That is, as shown in the figure, in the shake amount display means 22 of the third embodiment, the horizontal axis indicates time and the vertical axis indicates the shake amount, and the shake amount increases with time. It can be confirmed.

Further, in the third embodiment, since the blurring limit line is displayed by a dotted line or the like, it is possible to easily confirm how long time the blurring has not occurred.

The blur amount display means 2 of the third embodiment
Similarly to the second embodiment described above, 2 may also be a means such as a transmissive LCD provided in the finder and capable of superimposing, or a display panel provided on the back cover or the like.

According to the third embodiment as described above, the same effect as that of the second embodiment described above is obtained, and it is easy to understand the change in the amount of blurring with time. You can check if you have exceeded the time.

FIG. 16 shows a fourth embodiment of the present invention. In the fourth embodiment, LE is used as the blur amount display means.
The D array 23 is used.

This LED array 23 has, for example, 6 Ls.
The EDs are arranged in a vertical row.

In such an LED array 23, first, when the amount of blur is relatively small, as shown in FIG. 16A, only one LED located at the bottom is turned on.

When the amount of blurring becomes large,
As shown in FIG. 16B, depending on the amount of blurring,
Increase the number of LEDs to be lit.

With such a digital display, it is possible to confirm the magnitude of the blur stepwise and instantaneously, and to give a necessary warning to the photographer.

The LED array may be installed in the viewfinder so that it can be observed at the same time as the subject. However, the present invention is not limited to this, and it can be visually confirmed from the exterior surface of the camera, the back cover, or the like. You may provide in a position.

Although an LED array composed of a plurality of LEDs is used here, such an LED array is used.
The same warning can be issued without using the array, for example, by changing the lighting speed with one LED.

According to the fourth embodiment, the same effect as the second and third embodiments can be obtained, and the blurring can be displayed stepwise by digital display.

FIG. 17 shows a fifth embodiment of the present invention. In the fifth embodiment, a sound generation means such as a speaker is used to give a warning about the magnitude of the blur.

That is, as shown in FIG. 17, the speaker 2
4 is provided in the camera, and a sound for warning the magnitude of the blur is generated from the speaker 24.

As the generated warning sound, for example, a sound may be given, or the magnitude of the blur may be notified by the strength of the voice. It may be done by PCV, etc.,
It is not limited to this.

Since the fifth embodiment is an auditory warning, it may be carried out at the same time as each of the above-mentioned embodiments in which a visual notice is given.

According to the fifth embodiment, the same effects as those of the above-mentioned second to fourth embodiments are obtained, and
It is possible to make the photographer feel the blurring auditorily.

[Additional Notes] According to the above-described embodiment of the present invention as described in detail above, the following constitution can be obtained.

(1) In a camera equipped with a blur prevention function, a blur detecting means for detecting blur, a storage means for storing blur at the time of photographing, and an operation for confirming blur information stored in the storage means. A camera capable of confirming blurring, comprising: means for controlling blurring data stored in the storage means when there is an input to the operating means; and control means for controlling so as to notify the photographer of the blurring data.

(2) The camera capable of confirming blurring described in appendix 1 is characterized by further comprising display means for displaying the blurring data stored in the storage means.

(3) The camera capable of confirming blurring according to appendix 1 is characterized by further comprising reproducing means for reproducing the blurring data stored in the storage means.

(4) The camera capable of confirming blurring according to appendix 1, wherein the control means controls the start or stop of the blurring data storage operation based on the exposure signal of the camera.

(5) The camera capable of confirming blurring according to appendix 1, wherein the control means performs blurring correction and controls so as to notify the photographer of the stored blurring data.

[0098]

As described above, according to the camera capable of confirming the blur of the present invention, when the blur occurs during the exposure, it is possible for the photographer to feel the blur.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a camera capable of confirming blurring according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the optical axis of the camera capable of confirming blurring according to the first embodiment.

FIG. 3 is a diagram showing an example of changes in blurring in the X direction in the first embodiment.

FIG. 4 is a diagram showing an example of changes in blurring in the Y direction in the first embodiment.

FIG. 5 is a front view showing a state where the lens is stopped in the gimbal mechanism of the first embodiment.

FIG. 6 is a diagram showing a display in the finder when the camera is shaken in the X direction in the first embodiment.

FIG. 7 is a front view showing a state where the lens is driven around the Y axis in the gimbal mechanism of the first embodiment.

FIG. 8 is a view showing a display in a finder when a shake in the X direction is corrected in the first embodiment.

FIG. 9 is a diagram showing a temporal change of the blurring in the X direction stored in the external data memory of the first embodiment.

FIG. 10 is a diagram showing a temporal change of the shake in the Y direction stored in the external data memory according to the first embodiment.

FIG. 11 is a flowchart showing the operation of the CPU of the first embodiment.

FIG. 12 is a block diagram showing a part of a camera capable of confirming blurring according to a second embodiment of the present invention.

FIG. 13 is a diagram showing a state in which a trajectory of blurring is superimposed on the viewfinder of the second embodiment.

FIG. 14 is a perspective view showing a camera in which a back cover is provided with a display panel for displaying a blur amount in the second embodiment.

FIG. 15 is a diagram showing a method of displaying a blur amount according to the third embodiment of the present invention.

FIG. 16 is a diagram showing an LED array as a blur amount display means in a fourth embodiment of the present invention.

FIG. 17 is a diagram showing a speaker as a means for warning a blur amount in the fifth embodiment of the present invention.

[Explanation of symbols]

 1 ... X-axis angular velocity sensor (shake sensor means) 2 ... Y-axis angular velocity sensor (shake sensor means) 13 ... Gimbal mechanism 15 ... External data memory (storage means) 17 ... Replay switch 20 ... CPU 30 ... Shake amount calculation means 31 ... Shake amount display means (shake notification means)

Claims (3)

[Claims] 1. A camera capable of compensating for a blur at the time of photographing, and a pair of blur sensor means for detecting blur about two axes orthogonal to the camera, and a memory means for storing blur information detected by the blur sensor means. And a camera shake confirmation device for notifying the photographer of the stored camera shake information according to an operation input. 2. The camera capable of confirming blurring according to claim 1, wherein the blurring notifying means visually displays a trajectory of the blurring in a viewfinder of the camera. 3. The camera capable of confirming blurring according to claim 1, wherein the blurring notifying means notifies the presence of blurring of a predetermined value or more by sound.