JPH10200810A - Image driving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and stably obtain a desired driving style without placing any burden on an operator of a system when an image formed by an image formation system which forms the image is positively driven. SOLUTION: A variable optical-axis optical system 201 is an optical system which is provided in front of the image pickup surface of a video camera 100 and can control the angle of an optical axis of transmission. An angle sensor 204(X) detects the current value of the angle of rotation of a planoconvex lens 204(X) of the variable optical-axis angle optical system 201 and generates an angle signal S2(X) indicating the detected current value. An image drive signal generation part 207(X) generates an image drive signal S4(X) for positively driving a photographed image in a horizontal direction X. A control part 209(X), a motor drive part 210(X), and a driving motor 202(X) drives the photographed image in the horizontal direction X by driving and rotating the planoconvex lens 201(X) in the horizontal direction X according to an angle signal S2(X) and an image drive signal S4(X).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image driving apparatus for positively driving a photographed image in, for example, a camera-integrated video tape recorder (hereinafter referred to as "video camera").

[0002]

2. Description of the Related Art In general, when a television program is photographed by a video camera, it is sometimes necessary to photograph a scene in a vehicle such as a car or a train or an earthquake scene.
In such a case, it is necessary to vibrate the captured image in order to create a shaking atmosphere.

Conventionally, when a photographed image is vibrated, the photographer vibrates the video camera by vibrating the whole video camera.

[0004]

However, in such a configuration, there is a problem that it may be difficult to apply vibration suitable for the situation. Further, even if a vibration suitable for the scene can be applied, there is a problem that it is difficult to continue the vibration stably. Further, such a configuration has a problem that the burden on the photographer is increased.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to put a burden on an operator of a system when actively driving an image formed by an image forming system for forming an image. It is another object of the present invention to provide an image driving apparatus capable of easily and stably obtaining a desired driving mode.

[0006]

An image driving apparatus according to the present invention comprises: an image driving signal generating means for generating an image driving signal for driving an image formed by an image forming system for forming an image; Image drive means for driving an image formed by the image forming system based on an image drive signal output from the drive signal generation means.

In this image driving apparatus, an image driving signal for actively driving an image formed by the image forming system is generated from the image driving signal generating means. Then, based on the image drive signal, the image formed by the image forming system is driven by the image drive unit.

Thus, the image formed by the image forming system can be positively driven without placing a burden on the operator of the image forming system. Further, by changing the form (waveform and the like) of the image drive signal, a desired drive form can be easily and stably obtained.

[0009]

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

[First Embodiment] First, a first embodiment of the present invention will be described.
An embodiment will be described.

[Structure of First Embodiment] FIG. 1 is a block diagram showing a structure of the present embodiment. The figure shows a case where the image driving device of the present invention is applied to an image driving device of a video camera. The figure shows a case where the image driving apparatus of the present invention is realized by using a camera shake correction device of a video camera. Further, the figure shows a case where an optical camera shake correction device is used as the camera shake correction device.

Here, the camera shake correction device for a video camera is, for example, a device for suppressing a shake of a captured image due to a shake of a video camera caused by a shake of a photographer's hand. In addition, an optical image stabilization device is provided with an optical axis angle variable optical system capable of controlling a transmitted optical axis angle in front of an imaging surface of a video camera, and based on a shake of a captured image due to a shake of the video camera. This is a camera shake correction apparatus that controls the transmitted optical axis angle of the optical axis angle variable optical system to suppress the shake of the captured image due to the shake of the video camera. Here, the transmitted light axis angle refers to an angle formed by the optical axis of the outgoing light with respect to the optical axis of the incident light.

Now, the configuration of the present embodiment will be described in detail with reference to FIG. In the following description, X is added to the reference numerals of the components related to the horizontal direction (hereinafter, referred to as “X direction”), and the vertical direction (hereinafter, referred to as “Y direction”).
Y is added to the reference numerals of the components related to. Also,
The components related to both directions are not given any reference numerals.

In FIG. 1, reference numeral 100 denotes a video camera. Reference numeral 200 denotes a camera shake correction / image driving device. The camera shake correction / image driving device 200 has a camera shake correction function for suppressing a shake of a captured image due to a shake of a video camera, and an image drive function for positively driving the captured image.

In the image stabilizing / image driving apparatus 200, reference numeral 201 denotes an optical axis angle variable optical system capable of controlling a transmitted optical axis angle. This optical axis angle variable optical system 201 includes, for example,
Plano-concave lens 201 for controlling transmitted light axis angle in Y direction
(Y) and a plano-convex lens 201 (Y) for controlling the transmitted optical axis angle in the X direction. These constitute, for example, a variable angle prism.

That is, the plano-concave lens 201 (Y) and the plano-convex lens 201 (X) are arranged to face each other with the curved surfaces brought close to each other. The plano-concave lens 20
1 (Y) is driven to rotate in the Y direction about a rotation axis in the X direction passing through the center of curvature. Further, the plano-convex lens 201 (X) has Y passing through its center of curvature.
It is configured to be driven to rotate in the X direction about the rotation axis in the direction. Thereby, the two lenses 201
The angle formed by the planes of (X) and 201 (Y) is defined as the apex angle, and the apex angle variable prism capable of controlling the apex angle is formed.

Also, 202 (Y) is a plano-concave lens 201.
A drive motor for rotating (Y) in the Y direction is shown, and a drive motor 202 (X) for rotating the plano-convex lens 201 (X) in the X direction is shown.

Further, 203 (X) is a video camera 10
0 indicates a shake detection sensor that detects a shake in the X direction of 0 and generates a shake signal indicating the detected shake.
4 shows a shake detection sensor that detects a shake in the Y direction of the video camera 100 and generates a shake signal indicating the detected shake.
These are configured by, for example, an angular velocity detection sensor that detects the angular velocity of the shake and generates angular velocity signals S1 (X) and S1 (Y) indicating the detected angular velocity.

204 (Y) is a plano-concave lens 201 (Y)
Is an angle detection sensor that detects the current value of the rotation angle and generates an angle signal S2 (Y) (not shown) indicating the detected current value. Numeral 204 (X) denotes the rotation of the plano-convex lens 204 (X). The angle detection sensor detects the current value of the angle and generates an angle signal S2 (X) indicating the detected current value.

Here, lenses 204 (X) and 204
The rotation angle of (Y) is the optical axis angle variable optical system 201, respectively.
In the X and Y directions. Therefore, the angle signals S2 (X) and S2 (Y) output from the angle detection sensors 204 (X) and 204 (Y) are the transmitted light axis angles of the optical axis angle variable optical system 201 in the X and Y directions, respectively. Indicates the current value of.

The transmitted optical axis angles in the X and Y directions of the optical axis angle variable optical system 201 are respectively set in the X and Y directions of the photographed image.
Direction driving position. Therefore, the angle signals S2 (X) and S2 (Y) output from the angle detection sensors 204 (X) and 204 (Y) indicate the current values of the drive positions in the X and Y directions of the captured image, respectively.

Reference numeral 205 denotes a shake detection sensor 203.
(X), angular velocity signal S1 output from 203 (Y)
(X) shows an angular velocity amplifying unit for amplifying S1 (Y).

Further, 206 (X) is an angular velocity signal S1 (X) in the X direction amplified by the angular velocity amplifying section 205.
Is integrated to generate an angle signal S3 (X) indicating the shake angle of the video camera 100 in the X direction.

Here, the shake of the video camera 100 in the X direction corresponds to the shake of the captured image in the X direction. Therefore, the angle signal S3 output from the integration unit 206 (X)
(X) is a plano-convex lens 20 for performing a camera shake correction operation.
The target value of the rotation angle of 1 (X), in other words, the target value of the transmission optical axis angle in the X direction of the optical axis angle variable optical system 201 and the target value of the driving position of the captured image in the X direction.

207 (X) is the video camera 10
Image driving signal S for driving the photographed image 0 in the X direction
4 shows an image drive signal generator that generates 4 (X). The image drive signal S4 (X) output from the image drive signal generator 207 (X) is a target value of the rotation angle of the plano-convex lens 201 (X) when performing the image drive operation, in other words, the optical axis angle variable. A target value of the transmitted optical axis angle of the optical system 201 in the X direction and a target value of the drive position of the captured image in the X direction are shown.

When the camera shake correction operation is performed, an angle signal S3 output from the integration unit 206 (X) is provided.
When (X) is selected and the image driving operation is performed, the image driving signal S output from the image driving signal generation unit 207 (X) is used.
4 shows a selection switch for selecting 4 (X). This selection switch 208 (X) is operated by the photographer.

209 (X) is a selection switch 20
8 (X) and a control signal S6 for controlling the rotation of the plano-convex lens 201 (X) based on the angle signal S2 (X) output from the angle detection sensor 204 (X). (X) is a control unit.

Also, 210 (X) is a control unit 209.
Based on the control signal S6 (X) output from (X),
It is a motor drive unit that rotationally drives the drive motor 202 (X).

Reference numeral 211 denotes a lens barrel housing for accommodating the variable optical axis angle optical system 201. In addition to the optical axis angle variable optical system 201, a drive motor 202 (X),
202 (Y) and the like are also stored. In this case, the angular velocity amplification unit 205, the integration unit 206 (X), the image drive signal generation unit 207 (X), the selection switch 208 (X), the control unit 209 (X), and the motor drive unit 210 (X )
For example, it is housed in the lens barrel housing 211 while being mounted on a substrate.

The lens barrel housing 211 is mounted on the video camera 10.
The optical system 101 is detachably attached to the front end of the imaging optical system 101. In other words, the image driving device 2
00 is configured as an adapter of the video camera 100.

Although not shown in the figure, an integrating section, an image drive signal generating section, a selection switch, a control section, and a motor drive section are also provided in the Y direction.

The above-described image stabilization / image driving apparatus 200
, The optical axis angle variable optical system 201 and the drive motor 2
02 (X) and 202 (Y) and the shake detection sensor 203
(X), 203 (Y) and the angle detection sensor 204
(X), 204 (Y), the angular velocity amplification unit 205, the integration unit 206 (Y), the control unit 209 (X), and the motor drive unit 210 (X) constitute a camera shake correction device.

The image stabilizing and image driving device 20
0, the optical axis angle variable optical system 201, the drive motors 202 (X) and 202 (Y), and the angle detection sensor 204
(X), 204 (Y) and the image drive signal generator 207
(X), the control unit 209 (X), and the motor driving unit 210
(X) constitutes an image driving device.

In the above-described image drive device, the image drive signal generating section 207 (X) constitutes an image drive signal generating means.

In this image driving apparatus, the optical axis angle variable optical system 201 and the driving motors 202 (X), 20
2 (Y) and the angle detection sensors 204 (X), 204
(Y), the control unit 209 (X), and the motor driving unit 210
With (X), an image drive unit that drives an image based on the image drive signal output from the image drive signal generation unit is configured.

In the image driving means, the variable optical axis angle optical system 201 constitutes a variable optical axis angle optical system capable of controlling the transmission optical axis angle.

In this image driving means, the driving motors 202 (X) and 202 (Y), the angle detection sensors 204 (X) and 204 (Y), and the control unit 209 (X)
And the motor driving unit 210 (X) constitute driving means for controlling the transmitted optical axis angle of the optical axis angle variable optical system.

In the image driving means, the angle detection sensors 204 (X) and 204 (Y) constitute a current value detecting means for detecting the current value of the image driving position.

In this image driving means, the optical axis angle variable optical system 201 and the driving motors 202 (X), 20
2 (Y), the control unit 209 (X), and the motor driving unit 21
By 0 (X), driving means for driving a captured image is configured based on the current value signal output from the current value detecting means and the image driving signal output from the image driving signal generating means.

In the camera shake correction apparatus, the shake detection sensors 203 (X) and 203 (Y) and the angular velocity
05 and the integration unit 206 (X) constitute a shake detection unit of the camera shake correction apparatus. The shake detecting means detects the shake of the video camera 100, thereby indirectly detecting the shake of the captured image due to the shake of the video camera.

In this camera shake correction apparatus, the optical axis angle variable optical system 201 and the drive motors 202 (X), 2
02 (Y) and the angle detection sensors 204 (X), 204
(Y), the control unit 209 (X), and the motor driving unit 210
(X) constitutes a shake correction unit that suppresses image shake due to shake of the image forming system based on a shake signal output from the shake detection unit.

[Operation of First Embodiment] The operation of the image stabilization / image driving apparatus 200 in the above configuration will be described.

First, the operation for performing camera shake correction will be described. In this case, the movable contact c of the selection switch 208 (X) is connected to the fixed contact a. Also, the video camera 10 is controlled by the shake detection sensors 203 (X) and 203 (Y).
The angular velocities of the shakes in the X and Y directions of 0 are detected. Thereby, angular velocity signals S1 (X) and S1 (Y) indicating the angular velocities of the video camera 100 in the X and Y directions are output from the shake detection sensors 203 (X) and 203 (Y).

The two angular velocity signals S1 (X), S1
(Y) is amplified by the angular velocity amplification unit 205. Of the two angular velocity signals S1 (X) and S1 (Y) amplified by the angular velocity amplifier 205, the angular velocity signal S in the X direction
1 (X) is integrated by the integration unit 206 (X). As a result, an angle signal S3 (X) indicating the shake angle of the video camera 100 in the X direction is obtained. In other words, an angle signal S3 (X) indicating the target value of the rotation angle of the plano-convex lens 201 (X) is obtained. This angle signal S3 (X) is
The control unit 209 is provided via the selection switch 208 (X).
(X) is supplied to one input terminal.

When this camera shake correction is performed, the lens 201 (X) and 203 (Y) are used by the lens 201.
The current values of the rotation angles of (X) and 201 (Y) are detected. Thereby, the angle sensors 203 (X), 203
From (Y), angle signals S2 (X) and S2 (Y) indicating the current values of the rotation angles of the lenses 201 (X) and 201 (Y) (however, S2 (Y) is not shown) are output. Among these two angle signals S2 (X) and S2 (Y), the angle signal S2 (X) in the X direction is supplied to the other input terminal of the control unit 209 (X).

The control unit 209 (X) determines the plano-convex lens 2 based on these two input signals S3 (X) and S2 (X).
The control signal S6 detects an error between the target value of the rotation angle of 01 (X) and the current value and converges the error to zero.
(X) is generated. This control signal S6 (X) is supplied to the motor drive unit 210 (X). Motor drive unit 210
(X) drives the drive motor 202 (X) based on the control signal S6 (X).

As a result, the plano-convex lens 201 (X)
The rotation is driven so that the rotation angle converges to the target value. As a result, the transmitted optical axis angle in the X direction of the optical axis angle variable optical system 201 is controlled so as to converge to a target value. As a result, the drive position of the captured image in the X direction is controlled so as to converge to the target value. As a result, the shake in the X direction of the captured image due to the shake in the X direction of the video camera 100 is suppressed.
The above is the operation when performing camera shake correction.

Next, the operation for driving an image will be described. In this case, the movable contact c of the selection switch 208 (X)
Are connected to the fixed contact b. Thus, in this case,
The X-direction image drive signal S4 (X) output from the image drive signal generation unit 207 (X) is supplied to one input terminal of the control unit 209 (X). Also, the control unit 209
The other input terminal of (X) is connected to the X output from the angle detection sensor 204 (X), as in the case of performing camera shake correction.
A direction angle signal S2 (X) is provided.

In this case as well, the control unit 209 (X) determines the difference between the current value and the target value of the rotation angle of the plano-convex lens 201 (X) based on the two input signals S4 (X) and S2 (X). An error is detected, and a control signal S that converges the error to 0
6 (X) is generated. This control signal S6 (X) is supplied to the motor drive unit 210 (X).

Thus, the plano-convex lens 201 (X) is
It is driven to rotate in the X direction so that the rotation angle converges to the target value. As a result, the transmitted optical axis angle in the X direction of the optical axis angle variable optical system 201 is controlled so as to converge to a target value.
As a result, the drive position of the captured image in the X direction is controlled so as to converge to the target value. The above is the operation when image driving is performed.

FIG. 2 shows the image drive signals S4 (X), S4
It is a signal waveform diagram which shows the 1st example of (Y). Although not shown in FIG. 1, the image drive signal S4 (Y) indicates an image drive signal in the Y direction.

FIG. 5 shows an example of the image drive signals S4 (X) and S4 (Y) when the photographed image is vibrated. In this case, as the image drive signals S4 (X) and S4 (Y), signals that vibrate around a certain level are used. When vibrating the captured image,
As described above, there are cases where a scene of an earthquake or a scene in a vehicle is photographed. The figure shows image drive signals S4 (X) and S4 (Y) for photographing an earthquake scene.

In the figure, (a) shows a Y-direction image drive signal S4 (Y) output from a Y-direction image drive signal generator (not shown), and (b) shows an X-direction image drive signal generation. 13 shows an image drive signal S4 (X) in the X direction output from the unit 207 (X). In these, the horizontal axis indicates time, and the vertical axis indicates signal level. In the drawing, for example, 0 is used as the image drive signals S4 (X) and S4 (Y).
The signal oscillating around the level is shown.

When an earthquake occurs, usually, a large amount of pitching occurs in the first half of the occurrence period, and a large amount of rolling occurs in the second half. For this reason, in the example of FIG. 2, in the first half of the earthquake occurrence period, many image drive signals S4 (Y) in the Y direction are generated, and in the second half, many image drive signals S4 (X) in the X direction are generated. Has become.

As a result, in the first half of the earthquake occurrence period, the plano-concave lens 201 (Y) is vibrated in the Y direction around the rotation angle 0, and in the second half, the plano-convex lens 201 (Y) is vibrated.
(X) is vibrated more in the X direction about the rotation angle 0. As a result, in the first half of the earthquake occurrence period, the transmitted optical axis angle of the optical axis angle variable optical system 201 is largely vibrated in the Y direction around 0, and in the second half, it is largely vibrated in the X direction around 0. Can be Thus, in the first half of the earthquake occurrence period, the captured image is vibrated more in the Y direction, and in the latter half, it is vibrated more in the X direction. As a result, a captured image having the same effect as when an earthquake actually occurs can be obtained.

FIG. 3 shows the image drive signals S4 (X), S4
It is a signal waveform diagram which shows the 2nd example of (Y). In the first example, the case where the captured image is vibrated has been described. On the other hand, in this example, a case is shown in which the captured image is moved at a constant speed in a constant direction. In this case, as the image drive signal, an increase or decrease signal having a constant inclination is used. In addition,
As a case where a captured image is moved in a certain direction at a certain speed, there is a case where a moving object (for example, a train) that moves in a certain direction at a certain speed is shot.

FIG. 3 shows a case where the photographed image is moved at a constant speed in the X direction, for example. Also in FIG.
(A) shows the image drive signal S4 (Y) in the Y direction,
(B) shows the image drive signal S4 (X) in the X direction, the horizontal axis shows time, and the vertical axis shows the signal level.

In this case, the image drive signal S4 in the Y direction
The level of (Y) is maintained at a constant level as shown in FIG. The figure shows a case where the 0 level is held. On the other hand, as shown in FIG. 3B, the level of the image drive signal S4 (X) in the X direction is increased or decreased from a certain level at a constant slope. The figure shows a case where the value can be increased at a constant gradient from the 0 level.

Thus, the plano-concave lens 201 (Y) is
The rotation angle is fixed at the position of 0. On the other hand, the plano-convex lens 201 (X) is rotated at a constant speed from the position where the rotation angle is 0, for example, to the right in the X direction. As a result, the transmitted optical axis angle in the Y direction of the optical axis angle variable optical system 201 is fixed to 0, and the transmitted optical axis angle in the X direction is increased from the position of 0 to the right in the X direction at a constant speed. This allows
The photographed image is moved at a constant speed to the right in the X direction. As a result, it is possible to capture an image of a moving body that moves at a constant speed to the right in the X direction while the video camera 100 is fixed.

FIG. 4 shows the image drive signals S4 (X), S4
It is a signal waveform diagram which shows the 3rd example of (Y). In this example, a captured image is moved to a predetermined position and then fixed at that position. In this case, as the image drive signal, for example, after increasing or decreasing to a certain level,
A signal that maintains the level is used. As a case where the captured image is moved to a predetermined position and then fixed at that position, for example, a plurality of predetermined positions may be sequentially monitored by a video camera.

FIG. 4 shows a case where, for example, a photographed image is moved to a predetermined position in the Y direction and then fixed at that position. 4A also shows the image drive signal S4 (X) in the Y direction, FIG. 4B shows the image drive signal S4 (X) in the X direction, the horizontal axis shows time, and the vertical axis shows time. The axis indicates the level of the signal.

In this case, the image drive signal S4 in the Y direction
The level of (Y) is maintained at that level after being increased or decreased for a predetermined period as shown in FIG. The figure shows a case where the level is increased from the 0 level with a constant gradient for a predetermined period, and then maintained at that level. Further, the image drive signal S4 (X) in the X-direction is
As shown in (b), it is kept at a constant level. The figure shows a case where the level is held at 0 level.

As a result, the plano-concave lens 201 (Y)
From the position of the rotation angle 0, for example, after being rotated at a constant speed for a predetermined period upward in the Y direction, it is fixed at the final rotation position. On the other hand, the plano-convex lens 201 (X) is fixed at a position where the rotation angle is zero. As a result, the transmission optical axis angle in the Y direction of the optical axis angle variable optical system 201 is increased from the position 0 to the upper side in the Y direction at a constant speed for a predetermined period, and then fixed at the final rotation position. On the other hand, the transmitted optical axis angle in the X direction is fixed at a position of zero. Thereby, the captured image is moved upward at a constant speed for a predetermined period in the Y direction,
It is fixed in that position. As a result, the video camera 100
, The upper predetermined position in the Y direction can be monitored.

[Effects of the First Embodiment] According to the present embodiment described in detail above, the image drive signal generating section 20 for generating the image drive signal S4 (X) for driving a photographed image.
7 (X), and the image drive signal generator 207 (X)
Is driven positively based on the image drive signal S4 (X) output from the camera, so that the desired drive mode can be easily and stably obtained without imposing a burden on the photographer. it can.

According to such a configuration, various driving modes can be easily obtained only by changing the waveform of the image driving signal S4 (X).

According to such a configuration, the image driving device can be realized by using the image stabilizing device. Therefore, an increase in the number of components due to the addition of the image driving device can be prevented. .

[Modification of the First Embodiment] In the above description, the image drive signal generator 207 (X) is connected to the lens barrel housing 21.
1 has been described. However, in the present embodiment, this may be provided outside the lens barrel housing 211 and connected to the fixed terminal b of the selection switch 208 (X) via a connection cord.

In the above description, the case where the image driving apparatus is realized by using the image stabilizing apparatus having the optical axis angle variable optical system including the lens has been described. However, in the present embodiment, the image stabilization apparatus may be realized using an optical element other than the lens, for example, a camera shake correction apparatus having a transmitted light axis angle variable optical system including an acousto-optical element.

[Second Embodiment] Next, a second embodiment of the present invention will be described.
An embodiment will be described.

In the above embodiment, the case where the image stabilizing operation is stopped when the image driving operation is performed has been described. On the other hand, in the present embodiment, when performing the image driving operation, the camera shake correction operation is also performed at the same time.

[Configuration of Second Embodiment] FIG. 5 is a block diagram showing a configuration of the present embodiment. In FIG. 5, portions that perform substantially the same functions as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof will be omitted.

In the figure, reference numeral 212 (X) denotes an angle signal S2 (X) output from the angle detection sensor 204 (X) and an image drive signal S4 (X) output from the image drive signal generator 207 (X). And a combining operation unit that performs a combining operation on.
An example of the combination operation in this case is a subtraction operation. 213 (X) is the angle signal S2 (X) output from the angle sensor 204 (X) and the combining operation unit 212 (X)
This is a selection switch for selectively selecting the operation signal S7 (X) output from the CPU.

[Operation of Second Embodiment] The operation of the above configuration will be described. The angle signal S3 (X) output from the integration unit 206 (X) is constantly output from the control unit 209 (X).
Is supplied to one of the input terminals. On the other hand, the angle signal S2 (X) output from the angle sensor 204 (X) is
The signal is supplied to one fixed contact a of the selection switch 213 (X), and is also supplied to one input terminal of the synthesis operation unit 212 (X).

An image drive signal S4 (X) output from the image drive signal generator 207 (X) is supplied to the other input terminal of the synthesis operation unit 212 (X). The combining operation unit 212 (X) subtracts the image driving signal S4 (X) from the angle signal S2 (X), for example, to obtain the operation signal S (X).
7 (X) is generated. This operation signal S7 (X) is supplied to the other fixed contact b of the selection switch 213 (X).

The movable contact c of the selection switch 213 (X)
Is connected to the fixed contact a when performing a camera shake correction operation. Thus, in this case, the angle signal S2 (X) is supplied to the other input terminal of the control unit 209 (X). As a result, in this case, the same camera shake correction operation as that described in the first embodiment is performed.

On the other hand, when the image driving operation is performed,
The movable contact c of the selection switch 213 is connected to the fixed contact b. Thus, in this case, the operation signal S7 (X) output from the synthesis operation unit 212 (x) is supplied to the other input terminal of the control unit 209 (X). As a result, in this case, the image drive signal S4 is transmitted to the control system of the camera shake correction apparatus.
(X) is inserted as an offset signal. Thus, in this case, the image stabilizing operation is performed and the image driving operation is performed. As a result, in this case, the captured image can be driven without being affected by camera shake.

[Effects of Second Embodiment] According to the present embodiment described in detail above, the angle signal S3 (X) output from the integration section 206 (X) and the image drive signal generation section 207.
Since the image drive operation is performed based on the image drive signal S4 (X) output from (X), a camera shake correction operation can be performed simultaneously with the image drive operation. Thus, even when the image driving operation is performed while the video camera 100 is placed on the photographer's shoulder, the image driving operation can be prevented from being affected by camera shake.

[Modification of Second Embodiment] In the above description, the image drive signal S4 (X) is transmitted to the plano-convex lens 201.
The case of synthesizing with the angle signal S2 (X) of (X) has been described. However, in the present embodiment, the image drive signal S
4 (X) may be combined with the angle signal S3 (X) of the video camera 100.

In this case, the angle signal S3 (X) of the video camera 100 is supplied to one input terminal of the control unit 209 (X) when performing a camera shake correction operation, and when an image driving operation is performed. A composite signal of the angle signal S3 (X) and the image drive signal S4 (X) is supplied. In contrast,
An angle signal S2 (X) of the plano-convex lens 201 (X) is always supplied to the other input terminal of the control unit 209 (X).

Even in such a configuration, integrating section 206
The angle signal S3 (X) output from (X) and the image drive signal S4 output from the image drive signal generator 207 (X).
Since the image driving operation can be performed based on (X), the image driving operation can be prevented from being affected by camera shake.

[Third Embodiment] Next, a third embodiment of the present invention will be described.
An embodiment will be described.

In the above embodiment, the case where the image driving device of the present invention is realized by using an optical image stabilizing device has been described. On the other hand, the present embodiment is realized using an electronic image stabilizing device.

FIG. 6 is a block diagram showing the configuration of the present embodiment. In the figure, reference numeral 310 denotes a charge-coupled device (hereinafter, referred to as “CCD”) as an imaging device of a video camera. Reference numeral 320 denotes an analog / digital converter (hereinafter, referred to as an “A / D converter”) that converts a video signal output from the CCD 310 from an analog signal to a digital signal.

Reference numeral 330 denotes a camera shake correction / image driving device having a camera shake correction function and an image driving function. 340
Denotes a digital / analog conversion unit (hereinafter, referred to as a “D / A conversion unit”) that converts a video signal output from the camera shake correction / image driving device 330 from a digital signal to an analog signal.

In the image driving device 330, 331 is
5 shows a field memory for storing a digital video signal output from the A / D converter 320. A writing unit 332 writes a video signal to the field memory 331. Reference numeral 333 denotes a reading unit that reads a part of the video signal stored in the field memory 331.
The reading unit 333 cuts out a part of the image stored in the field memory 331 according to a predetermined cutout frame.

Reference numeral 334 denotes a motion vector detecting unit which detects the amount and direction (hereinafter referred to as "motion vector") of the captured image due to the video camera shake and generates a motion vector signal S11 indicating the detected motion vector. Show.
Reference numeral 335 denotes a cutout position control unit that controls the position of the cutout frame based on the motion vector signal S11 output from the motion vector detection unit 334.

Reference numeral 335 denotes an image drive signal generator for generating an image drive signal S12 for driving a photographed image.
Here, the image drive signal S12 output from the image drive signal generator 335 is a vector signal indicating the drive amount and the drive direction. A selection switch 336 selects one of the motion vector signal S11 and the image drive signal S12 and supplies the selected signal to the control unit 332.

The above-described camera shake correction / image driving device 330
, The field memory 331 and the writing unit 33
2, a reading unit 333, and a motion vector detecting unit 334.
And the cutout position control unit 337 constitute a camera shake correction device.

The image stabilizing / image driving device 33
0, the field memory 331 and the write unit 3
32, a reading unit 333, and an image drive signal generating unit 335
And the cutout position control unit 337 constitute an image driving device.

In the above-described image driving device, the image driving signal generating section 335 forms an image driving signal generating means. Also, in this image driving device, the field memory 331, the writing unit 332, and the reading unit 333
And the cutout position control unit 337 constitute an image driving unit for driving an image.

In the above-mentioned image driving means, the field memory 331, the writing section 332, and the reading section 333 form an image cutting means capable of cutting out a part of a photographed image and controlling the cut-out position. In this image driving means, the cut-out position control unit 3
By 37, a driving unit for driving an image is configured by controlling an image cutting position of the image cutting unit.

In the camera shake correction device, the motion vector detecting means 334 constitutes a shake detecting means. The shake detecting means directly detects the shake of the captured image due to the shake of the video camera 100. Also, in this camera shake correction device, a field memory 331, a writing unit 332, a reading unit 333,
The cutout position control unit 337 constitutes a shake correction unit.

[Operation of Third Embodiment] The operation of the above configuration will be described. The video signal output from the CCD 310 is converted into a digital video signal by the A / D converter 320 and then written into the field memory 331 by the writing unit 332. Field memory 33
After the video signal written in 1 is read by the reading unit 333, it is returned to an analog video signal by the D / A conversion unit 340.

The video signal converted into a digital signal by the A / D converter 320 is further supplied to a motion vector detector 34, which detects a motion vector of a captured image due to camera shake. The motion vector signal S11 indicating the detected motion vector is supplied to one fixed contact a of the selection switch 336. The other fixed contact b of the selection switch 336 is supplied with the image drive signal S12 output from the image drive signal generator 335.

The movable contact c of the selection switch 336 is
When performing a camera shake correction operation, it is connected to the fixed contact a. Thereby, in this case, the motion vector signal S11
Is supplied to the cutout position control unit 337. The cutout position control unit 337 calculates the motion vector signal S11
The position of the cutout frame of the image is determined, and a cutout position signal S13 indicating the determined position is supplied to the reading unit 333. The reading unit 333 positions the cutout frame according to the cutout position signal S13, and reads the video signal from the positioned cutout frame. Thereby, the shake of the captured image due to the shake of the video camera is suppressed.

On the other hand, when the image driving operation is performed,
The movable contact c of the selection switch 336 is connected to the fixed contact b. Accordingly, in this case, the image drive signal S12 is supplied to the cutout position control unit 337. As a result, in this case, the position of the cutout frame of the image is determined by the image drive signal S12. Then, based on the determination result, the reading unit 333 reads the video signal from the field memory 331. As a result, the captured image is driven according to the image drive signal S12.

[Effects of Third Embodiment] In the present embodiment described above, the same effects as in the first embodiment can be obtained.

[Fourth Embodiment] Next, a fourth embodiment of the present invention will be described.
An embodiment will be described.

In the third embodiment, the case where the image stabilizing operation is stopped when the image driving operation is executed has been described. On the other hand, in the present embodiment, when the image driving operation is performed, the camera shake correction operation is also performed at the same time.

[Structure of Fourth Embodiment] FIG. 7 is a block diagram showing the structure of the present embodiment. In FIG. 7, portions that perform substantially the same functions as those in FIG. 6 described above are denoted by the same reference numerals, and detailed description thereof will be omitted.

In the figure, reference numeral 338 denotes a motion detecting section 334.
Of the motion vector signal S11 output from the image drive signal S12 and the image drive signal S12 output from the image drive signal drive unit 335, and outputs the calculation signal S14 to the cutout position control unit 33.
7 shows a synthesis operation unit to be supplied to the control unit 7. Reference numeral 339 denotes a selection switch for selectively selecting the motion vector signal S11 output from the motion detection unit 334 and the operation signal S14 output from the synthesis operation unit 338.

[Operation of Fourth Embodiment] The operation of the above configuration will be described. When performing image stabilization operation,
The movable contact c of the selection switch 339 is changed to the fixed contact a. Accordingly, in this case, the motion vector detection unit 334
Is supplied to the cutout position control unit 337. As a result, in this case, the third
The same hand-shake correction operation as the hand-shake correction operation described in the embodiment is performed.

On the other hand, when the image driving operation is performed,
The movable contact c of the selection switch 39 is connected to the fixed contact b. Thereby, in this case, the operation signal S14 output from the synthesis operation unit 38 is supplied to the cutout position control unit 337. As a result, in this case, the image drive signal S12 is inserted as an offset signal into the control system of the camera shake correction device. As a result, in this case, the camera shake correction operation and the image driving operation are performed in parallel.

[Effects of the Fourth Embodiment] In the present embodiment described above, the same effects as in the second embodiment can be obtained.

[Other Embodiments] Although the four embodiments of the present invention have been described in detail, the present invention is not limited to the above-described embodiments.

For example, in the first and second embodiments, the photographed image is driven in two directions, that is, the X direction and the Y direction, so that the photographed image is driven in all directions on the two-dimensional plane. I explained the case. However, according to the present invention, the captured image may be driven in any direction on the two-dimensional plane by driving the captured image in two directions other than the X direction and the Y direction.

In the first to fourth embodiments,
The case where the captured image is driven in all directions on the two-dimensional plane has been described. However, the present invention, for example,
The driving may be performed only in the direction.

In the first and second embodiments,
The case has been described in which an image drive device is realized using an optical image stabilization device that detects a shake of the video camera 100 and indirectly detects a shake of a captured image due to the shake of the video camera 100. However, according to the present invention, as in the third and fourth embodiments, an optical system that directly detects a shake of a captured image due to a shake of a video camera 100 by detecting a shake of a captured image. An image drive device may be realized by using a camera shake correction device.

Similarly, in the third and fourth embodiments, the electronic camera shake correction for directly detecting the shake of the photographed image due to the shake of the video camera 100 by detecting the shake of the photographed image. The case where the image driving apparatus is realized using the apparatus has been described. However, the present invention is different from the first and second embodiments in that the video camera 100
The image drive device may be realized by using an electronic image stabilization device that indirectly detects a shake of a captured image due to a shake of the video camera 100 by detecting a shake of the video camera 100.

Further, in the above embodiment, the case where the present invention is realized by using the camera shake correction device has been described. However, the present invention may be configured separately from the camera shake correction device.

In the above embodiment, the case where the present invention is applied to an image driving device of a video camera has been described. However, the present invention can also be applied to an image driving device of an imaging system other than a video camera. For example,
The present invention can also be applied to an image driving device of an electronic still camera.

The present invention is not limited to an image driving apparatus for driving a photographed image of a photographing system for photographing a subject.
The present invention can also be applied to an image driving device that drives a projection image of a projection system that projects an image that has already been shot. For example, the present invention can be applied to an image driving device that drives a projection image of a projector.

In addition, it goes without saying that the present invention can be variously modified and implemented without departing from the gist of the invention.

[0114]

As described in detail above, according to the image driving apparatus of the first to tenth aspects, there is provided an image driving signal generating means for generating an image driving signal for driving an image, and an image driving signal output means is provided from this means. Since the photographed image is driven based on the image driving signal, a desired driving mode can be easily and stably obtained without imposing a burden on the operator.

According to such a configuration, various driving modes can be easily obtained only by changing the waveform of the image driving signal.

Further, according to such a configuration, since the image driving device can be realized by using the camera shake correction device, it is possible to prevent an increase in the number of components due to the provision of the image driving device.

Further, according to the image driving apparatus of the fourth aspect, the image drive is performed based on the shake signal indicating the shake of the image due to the shake of the image forming system and the image drive signal for positively driving the image. Since the operation is performed, a camera shake correction operation can be performed simultaneously with the image driving operation. Thus, for example, even when a photographer performs an image driving operation while holding the image forming system, the image driving operation can be prevented from being affected by camera shake.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a first embodiment of an image driving device according to the present invention.

FIG. 2 is a diagram for explaining the operation of the first embodiment, and in particular, a diagram showing a first example of an image drive signal.

FIG. 3 is a diagram for explaining the operation of the first embodiment, and in particular, a diagram showing a second example of an image drive signal.

FIG. 4 is a diagram for explaining the operation of the first embodiment, and in particular, a diagram showing a third example of an image drive signal.

FIG. 5 is a block diagram illustrating a configuration of an image driving device according to a second embodiment of the present invention.

FIG. 6 is a block diagram illustrating a configuration of an image driving device according to a third embodiment of the present invention.

FIG. 7 is a block diagram illustrating a configuration of an image driving device according to a fourth embodiment of the present invention.

[Explanation of symbols]

100 video camera, 200 image drive device, 201
... Optical axis angle variable optical system, 201 (X) ... Plano-convex lens, 20
1 (Y): Plano-concave lens, 202 (X), 202 (Y) ...
Drive motors, 203 (X), 203 (Y): shake detection sensors, 204 (X), 204 (Y): angle detection sensors,
205: angular velocity amplifying unit, 206 (X): integrating unit, 207
(X): image drive signal generation unit, 208 (X): selection switch, 209 (X): control unit, 210 (X): motor drive unit, 211: lens barrel housing, 212 (X): synthesis operation unit ,
213 (X): selection switch, 310: CCD, 320
… A / D converter, 330… Camera shake correction / image driving device,
340: D / A converter, 331: Field memory, 3
32 write unit, 333 read unit, 334 motion vector detection unit, 335 image drive signal generation unit, 336 selection switch, 337 cutout position control unit, 338 synthesis operation unit, 339 selection switch

Claims (10)

[Claims] An image drive signal generating means for outputting an image drive signal for driving an image formed by an image forming system for forming an image, and an image drive signal generated by the image drive signal generating means. And an image driving unit for driving the image formed by the image forming system based on the image forming system. 2. The image driving unit drives the image formed by the image forming system based on a shake signal output from a shake detection unit that detects a shake of the image due to a shake of the image forming system. 2. The image driving apparatus according to claim 1, wherein the image driving apparatus is also used as a shake correction unit that suppresses the shake of the image due to the shake of the image forming system. 3. The image driving system according to claim 2, wherein the image driving unit is configured to form the image based on the shake signal output from the shake detection unit when suppressing the shake of the image due to the shake of the image forming system. When the image formed by the image forming system is driven positively, the image is driven based on the image drive signal output from the image drive signal generating means. 3. The apparatus according to claim 2, wherein
The image driving device as described in the above. 4. When the image drive unit suppresses the image shake caused by the shake of the image forming system, the image drive unit is formed by the image forming system based on the shake signal output from the shake detection unit. When the image formed by the image forming system is actively driven, the shake signal output from the shake detection unit and the image output from the image drive signal generation unit are driven. The image driving device according to claim 2, wherein the image driving device is configured to drive the image based on a driving signal. 5. The image drive unit includes: an optical axis angle variable optical system capable of controlling a transmitted optical axis angle; and an optical axis angle variable based on the image drive signal output from the image drive signal generation unit. 2. The image driving apparatus according to claim 1, further comprising: a driving unit that drives the image formed by the image forming system by controlling a transmission optical axis angle of an optical system. 6. The image drive unit, which cuts out a part of the image formed by the image forming system, wherein the image drive unit is capable of controlling the cutout position, and 2. A drive unit for driving the image formed by the image forming system by controlling a cutout position of the image cutout unit based on the output image drive signal. The image driving device as described in the above. 7. A current value detecting means for detecting a current value of a driving position of the image formed by the image forming system, and generating a current value signal indicating the detected current value; The image forming system is configured such that the drive position of the image converges to a target value based on the current value signal output from the current value detection unit and the image drive signal output from the image drive signal generation unit. 2. The image driving apparatus according to claim 1, further comprising a driving unit that drives the image formed by the image forming apparatus. 8. The image forming apparatus according to claim 1, wherein the shake detecting unit is configured to detect a shake of the image forming system, thereby indirectly detecting a shake of the image due to the shake of the image forming system. The image driving device according to claim 2. 9. The apparatus according to claim 1, wherein the shake detecting means is configured to directly detect the shake by detecting a shake of the image due to a shake of the image forming system. The image driving device as described in the above. 10. The image driving apparatus according to claim 1, wherein the image forming system is a photographing system that forms an image of the subject by photographing the subject.