JP3402760B2 - Imaging equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention includes a shake correction device.
The present invention relates to an image capturing device .

[0002]

2. Description of the Related Art FIG. 10 shows an example of the main configuration of a conventional shake correction apparatus and a photographing apparatus equipped with the apparatus.

In FIG. 10 (a), reference numeral 1 denotes an angular velocity detecting means including an angular velocity sensor such as a vibration gyro, which is attached to a shake correction device provided in a camera or the like. Reference numeral 2 denotes a DC cut filter that cuts off the DC component of the angular velocity signal output from the angular velocity detection means 1 and passes only the AC component, that is, the vibration component. As the DC cut filter 2, a high-pass that cuts off the signal in an arbitrary band. A filter (hereinafter referred to as HPF) may be used. Three
Is an amplifier that amplifies the angular velocity signal output from the DC cut filter 2 to an appropriate sensitivity.

Reference numeral 4 is an A / D converter for converting the angular velocity signal output from the amplifier 3 into a digital signal, 5 is an HPF having a function capable of varying in an arbitrary band, and 6 is a predetermined frequency extracted by the HPF 5. An integrating circuit for integrating the signal of the component and outputting an angular displacement signal in the frequency component, 7
Is a phase and gain correction circuit that corrects the integrated signal of the angular velocity signal output from the integration circuit 6, that is, the phase and gain of the angular displacement signal. Reference numeral 11 indicates the operating state such as pan / tilt of the photographing device from the angular velocity signal and the angular displacement signal. An operating state determination means for determining and controlling the characteristics of the HPF 5 and the phase and gain correction circuit 7 in accordance with the operating state, 8 converts the output from the phase and gain correction circuit 7 into an analog signal or a pulse output such as PWM. It is a D / A converter that outputs.

The above-mentioned A / D converter 4, HPF 5, integrating circuit 6, phase and gain correction circuit 7, operating state judging means 1
1 and the D / A converter 8 are configured by, for example, a microcomputer (hereinafter, referred to as a microcomputer) COM1.

Reference numeral 9 is a drive circuit for driving so as to suppress an image correction means, which will be described later, based on a displacement signal output from the microcomputer COM1. Reference numeral 10 denotes an image correction means, for example, an optical correction means for displacing the optical optical axis to cancel the shake, or an electronic for electronically shifting the image reading position from the memory storing the image to cancel the shake. Correction means are used.

In FIG. 10B, reference numeral 15 is a taking lens system, 16 is an image pickup device such as a CCD for photoelectrically converting a subject image formed on an image pickup surface into an image pickup signal, and 17 is an image pickup device 16 It is a preamplifier that amplifies the output image pickup signal to a predetermined level. Reference numeral 18 is a gamma correction, blacking process,
It is a process circuit that performs a predetermined process such as addition of a sync signal to convert it into a standardized television signal and outputs it from a video output terminal. The television signal output from the process circuit 18 is shown as a video output. Not supplied to video recorders or electronic viewfinders.

While watching this image, the user can adjust the jig S3.
On the other hand, the operating state determination means 11 to which a signal corresponding to this operation is input changes the characteristics of the phase and gain correction circuit 7 according to this signal. In this way, the characteristic that maximizes the shake correction effect is set by the adjustment.

FIG. 11 is a diagram showing a state during adjustment of the shake correction apparatus.

In FIG. 11, a shake correction device S1 is provided in a photographing device such as a video camera or a silver salt camera to correct a shake such as a shake, and the vibration device S2 is driven by a drive device S5. Vibration is applied to the photographing device. Further, the adjustment jig S3 is a jig for adjusting the shake correction characteristic of the shake correction apparatus S1 from the image of the subject S4 when the image pickup apparatus including the shake correction apparatus S1 is vibrating by the shaker S2. It is a tool.

For example, a sine wave is applied to the vibrating device S2, and the subject S4 is adjusted so that the shake correction at that time is most effective.
Of the shake correction device S by the adjustment jig S3 while watching the image of
The characteristic of 1 is made variable.

[0012]

However, in the above-described adjustment method, it takes time and cost to perform the adjustment, and it is possible that the most effective adjustment value is not obtained.

(Object of the Invention) The object of the present invention is to achieve high efficiency and low cost of production , and high-performance swing.
An object of the present invention is to provide an imaging device that can adjust the correction characteristics .

[0014]

In order to achieve the above object, the present invention provides a photographing lens system and a photographing lens system.
Image pickup means for picking up an image of these and vibration detection for detecting vibration
Means and a shake of the image based on the output of the vibration detecting means.
And a drive unit for driving the correction unit
To compensate the phase and gain of the output of the vibration detection means.
Correcting phase and gain correction means, and said phase and gain
By changing the characteristics of the correction means, the correction means and the drive
A motion state determination hand that controls the shake compensation characteristics of the moving means.
Stage and the object's co-ordinate in the video signal from the imaging means.
A filter for detecting untrust, and
Bandpass filter for extracting high frequency components in video signals
Of the subject in the video signal from the image pickup means.
A blur width detection circuit for detecting the blur width, the filter and
And the band pass filter and the blur width detection circuit?
Of the output of the image signal from the image pickup means
Gate circuit for passing the output of the region, and the gate circuit
The peak value of the high frequency component in the output that has passed
And a peak detection circuit, the operating state determination means,
By increasing or decreasing the gain of the phase and gain correction means,
The value of the high frequency component of the video signal that has passed through the specified area is the maximum.
An imaging device that has the function of adjusting to a large gain
It is a thing.

[0015]

[0016]

[0017]

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on the illustrated embodiments.

[0019] FIG. 1 is a block diagram showing a main configuration of the first reference technology examples definitive <br/> shake correction apparatus and an imaging apparatus having the device according to the present invention.

Since the configuration from the angular velocity detecting means 1 to the operating state determining means 11 of FIG. 1A is the same as that of FIG. 11A, the same reference numerals are given and the description thereof is omitted.

In FIG. 1A, 12 is a gain increasing switch for increasing the gain, 13 is a gain decreasing switch for decreasing the gain, and 14 is a shake correction that maximizes the peak value of the high frequency component of the video signal. The characteristic is the operation state determination means 11
A setting switch for setting, it is connected to the operating state determining means 11, respectively. Then, these switches 12 to 14 constitute an adjusting jig S3. The adjusting jig S3 may be integrally incorporated in the shake correcting apparatus, or may be detachable from the shake correcting apparatus.

In FIG. 1B, reference numeral 15 is a taking lens system, 16 is an image pickup device such as a CCD for photoelectrically converting a subject image formed on an image pickup surface into an image pickup signal, and 17 is an image pickup device 16 It is a preamplifier that amplifies the output imaging signal to a predetermined level. Reference numeral 18 is a gamma correction, blacking process,
It is a process circuit that performs a predetermined process such as addition of a sync signal to convert it into a standardized television signal and outputs it from a video output terminal. The television signal output from the process circuit 18 is shown as a video output. Not supplied to video recorders or electronic viewfinders. Reference numeral 19 is an all-pass filter set so that the size of the contrast of the subject can be discriminated from the video signal output from the preamplifier 17, and 20 is also the preamplifier 1.
A bandpass filter for extracting a high-frequency component necessary for performing focus detection from the video signal output from 7 and a detection circuit 21 for the blur width of the subject (width of the edge portion of the subject) from the video signal. .

The focus detection method using this blur width detection circuit is as follows:
For example, since it is publicly known from Japanese Patent Laid-Open No. 62-103616, etc., its details are omitted.

Reference numeral 22 is a gate circuit that gates the outputs of the object discrimination filter 19, the bandpass filter 20, and the blur width detection circuit 21 to pass only the signal corresponding to the designated area on the image pickup surface. Setting of a passing area where only a signal corresponding to a designated area in a video signal for one field is passed and a high frequency component is extracted at an arbitrary position in an imaging screen, that is, a focus detection area for performing focus degree detection It can be performed.

Reference numeral 23 is a peak detection circuit for detecting the horizontal and vertical positions on the image pickup screen where the peak value of the high frequency component is obtained from the video signal corresponding to the focus detection area extracted by the gate circuit 22. .

The sharpness signal detection circuit 27 is constituted by the peak detection circuit 23 from the above-described object discrimination filter 19.

Reference numeral 24 is a signal level display means for displaying the blur width information supplied from the blur width detection circuit 21 and the peak value information of the high frequency component supplied from the band pass filter 20.

In response to the operation of the gain increasing switch 12 and the gain decreasing switch 13, the operating state judging means 11 varies the gain with respect to the phase and gain correction circuit 7 to maximize the peak value of the high frequency component of the video signal. Adjust to the shake compensation characteristic that At that time, the setting switch 14 is an operation switch for setting the gain when the high frequency component has a peak value, and the operation determination means 11 sets the gain when the setting switch 14 is operated.

Next, the operation during adjustment will be described more specifically with reference to FIG.

The operating state determining means 11 uses the adjustment value at the peak of the high frequency component value in this figure, and the operating state determining means 11 varies the gain with respect to the phase and gain correction circuit 7 to obtain an image. Find the peak of the high frequency component of the signal.

FIG. 3 is a flow chart showing an example of an operation procedure when setting the gain in the operation state judging means 11 using the adjusting jig S3.

The user first of all determines the signal level display means 24.
The signal level of the high frequency component of the video signal displayed on the screen is read (step 101), and the gain increasing switch 12
Alternatively, the gain reduction switch 13 is operated to increase or decrease the gain (step 102), and then the gain setting switch 14 is operated when the output level of the signal level display means 24 is the highest with respect to the increase or decrease of the gain. Then, it is set in the operation state determination means 11 as an adjustment value of the shake correction apparatus (step 103).

[0033] (second reference technology Example) FIGS. 4 and 5 are views of a second reference technology example according to <br/> present invention, FIG. 11
The same parts as are denoted by the same reference numerals.

This reference technology example shows an example in which a camera jig S6 having a video signal detection and signal processing circuit is used. The purpose of this reference technology example is to refer to the above-mentioned first reference.
This is the same as the considered technology example , and the description will be given with reference to FIGS.

In FIG. 4, the camera jig S6 includes a subject discrimination filter 19 similar to the sharp signal detection circuit 27,
An example of a configuration in which a bandpass filter 20, a blur width detection circuit 21, a gate circuit 22, and a peak position detection circuit 23 are built in, and the video signal from the shake correction apparatus S1 is processed and output to the signal level display means 24. The operation procedure when setting the shake correction characteristic is the same as in FIG.

In FIG. 5, the camera jig S6 includes an image pickup device 16, a preamplifier 17, a process circuit 18, a subject discriminating filter 19, a bandpass filter 20, a blur width detecting circuit 21, a gate circuit 22, and a peak position detecting circuit 23.
The figure shows an example of a configuration in which an image of a viewfinder of the shake correction apparatus S1 and a subject image such as an optical image are signal-processed and output to the signal level display means 24 by setting the shake correction characteristic. The operating procedure at that time is the same as that in FIG.

First Embodiment FIG. 6 shows a first embodiment of the present invention.
FIG. 2 is a block diagram showing a main configuration of a shake correction apparatus and an image pickup apparatus equipped with the apparatus according to the embodiment of the present invention. The same parts as those in FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted.

The operation state discriminating means 11 includes the blur width information detected by the blur width detecting circuit 21 and the band pass filter 2.
The peak value information of the high frequency component supplied from 0 is fetched through the A / D converter 4, and the presence / absence of adjustment, the type, the start, etc. are determined according to the input signal of the adjustment mode switch 25, and the phase and gain are corrected. The gain of the circuit 7 is changed by itself to adjust the shake correction characteristic so that the peak value of the high frequency component of the video signal becomes maximum.

FIG. 7 is a flow chart showing an example of the operation of the above-mentioned operation state judging means 11.

In step 301, the A / D converter 4
The video signal converted by is read, the gain is automatically increased / decreased in the next step 302, and in the subsequent step 303, the A / D conversion value of the video signal is the maximum with respect to the gain increase / decrease in step 302. At this time, the gain is set and used as the adjustment value for the shake correction device.

(Second Embodiment) FIG 8 is a second aspect of the present invention
FIG. 2 is a block diagram showing a main configuration of a shake correction apparatus and an image pickup apparatus equipped with the apparatus according to the embodiment of the present invention. The same parts as those in FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted.

In this embodiment, a storage device 26 is added to the configuration of FIG. 6 in the first embodiment described above.

The feature of this embodiment, to store the adjustment values obtained by the adjustment described above in the storage device 26, when the stabilizing device is operated, regardless Kakawawa the power ON / OFF,
The shake correction operation is always realized with the optimum adjustment value.

FIG. 9 is a flow chart showing an example of the operation of the above-mentioned operation state judging means 11.

In step 401, the A / D converter 4
The video signal converted by is read, the gain is automatically increased / decreased in the next step 402, and in the next step 403, the A / D conversion value of the video signal is the maximum with respect to the gain increase / decrease in step 402. The gain at the time of is set as the adjustment value of the shake correction apparatus, and in step 404, the adjustment value is stored in the storage device 2
Store in 6.

Writing to the storage device 26
This is effective not only when performing automatic adjustment, but also when performing manual adjustment. That is, the setting operation in the first embodiment described above can include writing to the storage device.

[0047]

According to the above first and second embodiments,
The gain is automatically changed by using the video signal output during vibration,
Since the setting is performed using the adjustment jig S3, the adjustment value does not fluctuate as in the conventional case, and the adjustment time can be shortened as in the conventional case, and the cost can be reduced. Can be achieved.

In the present embodiment (response invention Example), the angular velocity detecting means 1 corresponds to the vibration detecting means of the present invention, the image correction unit 10 corresponds to the correction means of the present invention, shooting
The shadow lens system 15 corresponds to the taking lens system of the present invention, and CC
The image pickup device 16 such as D corresponds to the image pickup means of the present invention, and is driven.
The circuit 9 corresponds to the driving means of the present invention, and the phase and gain correction is performed.
The circuit 7 corresponds to the phase and gain correction means of the present invention, and
The work state determination means 11 corresponds to the operation state determination means of the present invention.
However, the subject discrimination filter 19 is used as the filter of the present invention.
Correspondingly, the bandpass filter 20 is the bandpass filter of the present invention.
The blur width detection circuit 21 corresponds to a filter, and the blur width detection circuit 21 is a blur of the present invention.
The gate circuit 22 corresponds to the width detection circuit, and the gate circuit 22 is the gate of the present invention.
It corresponds to a circuit, and the peak detection circuit 23 is the peak detection circuit of the present invention.
It corresponds to the output circuit.

The above is the correspondence relationship between each configuration of the embodiments and each configuration of the present invention, but the present invention is not limited to the configurations of these embodiments, and the functions or embodiments shown in the claims or the embodiments It goes without saying that any structure may be used as long as it can achieve the function of.

(Modification) The present invention uses an angular velocity such as a vibration gyro as a means for detecting shake, but the invention is not limited to this. An angular acceleration sensor, an acceleration sensor, a speed sensor, an angular displacement, etc. Any sensor that can detect shake, such as a sensor, a displacement sensor, and a method of detecting image shake itself, may be used.

In the present invention, as the image correction means, as already described, the optical correction means for displacing the optical optical axis to cancel the shake, or electronically reading the image from the memory storing the image. Any electronic correction means for shifting the position to cancel the shake may be used. Further, as the optical correction means, a light flux changing means such as a shift optical system or a variable apex angle prism for moving an optical member in a plane perpendicular to the optical axis, or a means for moving a photographing surface in a plane perpendicular to the optical axis, etc. Any type can be used as long as it can prevent shake.

When the present invention is applied to a photographing device such as a single-lens reflex camera, a lens shutter camera, a video camera, etc.
Is assumed .

[0054]

[0055]

As described above, according to the present invention, it is possible to achieve production efficiency and cost reduction, and to achieve high productivity.
Providing an imaging device that can be adjusted to the image stabilization characteristics
It is something that can be offered.

[0056]

[0057]

[0058]

[0059]

[Brief description of drawings]

1 is a block diagram showing a main configuration of the shake correcting device and an imaging apparatus having the device according to the first reference technology according to the present invention.

Is a diagram to help adjust the time of the description of the shake correction characteristic in the first reference technology example according to the present invention; FIG.

FIG. 3 is a flow chart showing an example of an operation procedure when setting a gain in an operation state determination means using the adjustment jig of FIG.

It is a diagram showing a state at the time of adjustment of the stabilizing device of the second reference technology example according to the present invention; FIG.

[5] also it is a view showing another example of adjustment time of a state of the stabilizing device of the second reference technology according to the present invention.

FIG. 6 is a block diagram showing a main configuration of a shake correction apparatus and a photographing apparatus equipped with the apparatus according to the first embodiment of the present invention.

FIG. 7 is a flowchart showing the operation of the operation state determination means of FIG.

FIG. 8 is a block diagram showing a main configuration of a shake correction apparatus and a photographing apparatus equipped with the apparatus according to a second embodiment of the present invention.

9 is a flowchart showing the operation of the operation state determination means in FIG.

FIG. 10 is a block diagram showing a configuration example of a main part of a conventional shake correction apparatus and a photographing apparatus provided with the apparatus.

FIG. 11 is a diagram showing a state during adjustment of a conventional shake correction apparatus.

[Explanation of symbols]

1 angular velocity detection means 4 A / D converter 6 integration circuit 7 phase and gain correction circuit 11 shooting state determination means 15 shooting lens system 16 image sensor 19 object discrimination filter 20 band pass filter 21 blur width detection circuit 22 gate circuit 23 peak Detection circuit 24 Signal level display stage 25 Adjustment mode switch 26 Storage device 27 Sharpness signal circuit S1 Shake correction device S3 Adjustment

Front page continuation (58) Fields surveyed (Int.Cl. ⁷ , DB name) G03B 5/00 G03B 17/00-17/02 G03B 17/22 G03B 17/26-17/34 G03B 17/38-17 / 46 H04N 5/232

Claims (2)

(57) [Claims] 1. A photographing lens system and a photographing lens system
An image pickup means for picking up an image, a vibration detection means for detecting vibration, a correction means for correcting the shake of the image based on the output of the vibration detection means, and a drive means for driving the correction means,
Corrects the phase and gain of the output of the vibration detecting means .
Phase and gain correction means, and the phase and gain correction
An operation state determination means for controlling the shake correction characteristics by the correction means and the drive means by changing the characteristics of the means, and the subject control in the video signal from the image pickup means.
A filter for detecting trust and an image from the image pickup means.
Bandpass filter for extracting high frequency components in image signals
Of the subject in the video signal from the image pickup means.
A blur width detecting circuit for detecting a blur width, the filter, and
From the band pass filter and the blur width detection circuit
Output of the specified area in the video signal from the image pickup means.
The gate circuit that passes the output of the range and the gate circuit
Detect the peak value of high frequency component in the output that has passed
And a peak detection circuit, the operation state determining means, before
By increasing or decreasing the gain of the phase and gain correction means,
The maximum value of the high frequency component of the video signal that has passed through the constant region
It has a function to adjust to the gain
Imaging device. 2. Adjusted by the operating state determination means
The photographing apparatus according to claim 1 , further comprising a storage unit that stores the gain information .