JPH0488761A - Device for correcting unsteady holding by hands - Google Patents

Abstract

PURPOSE:To avoid deterioration in picture quality effectively with simple constitution by storing a large image pickup picture into a memory circuit and segmenting and outputting an image pickup picture based on the result of detection of a shaking quantity. CONSTITUTION:Horizontal and vertical acceleration detected by X and Y direction acceleration sensors 8, 10 are integrated twice by integration circuits 12, 14 to detect horizontal and vertical shaking quantity. The result of detection is outputted to correction data generating circuits 16, 18, in which the result is converted into an address correction data and it is outputted to a memory control circuit 20. The circuit 20 reads the data based on the address data and outputs the data to a memory circuit 6. The circuit 6 stores an image pickup picture with a large picture angle and outputs an image pickup signal SS based on the address data generated basing on the address correction data and segments and outputs the image pickup picture from a position displayed by the shaking thereby allowing correction of shaking with simple constitution.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to an image stabilization device, and can be applied to, for example, a camera-integrated video tape recorder.

B Summary of the Invention The present invention effectively avoids image quality deterioration with a simple configuration in an image stabilization device by storing a large captured image in a memory circuit, and cutting out and outputting the captured image based on the detection result of the amount of camera shake. can do.

C. Prior Art Conventionally, in video equipment such as camera-integrated video tape recorders, an image stabilization device has been proposed that corrects image stabilization based on motion vector detection results (Japanese Patent Laid-Open Publication No. 1987-63466370). .

That is, in the image stabilization device, a portion of the video signal resulting from the imaging result is stored in a memory circuit, and a motion vector is detected from the video signal.

Furthermore, the address data is switched based on the motion vector detection result, and the video signal stored in the memory circuit is read out based on the address data.

As a result, the original image is displaced in the opposite direction to compensate for the camera shake, and the video signal is read out, thereby making it possible to correct the camera shake.

D Problems to be Solved by the Invention In this method, there is a problem that the structure of the motion vector detecting means is complicated, and the overall structure is accordingly complicated.

Further, by reading out the original image while displacing it in the direction opposite to the camera shake, a part of the image may be output with a portion missing.

For this reason, it is necessary to enlarge or reduce the image in order to correct image defects, which inevitably leads to deterioration in image quality and makes the overall configuration more complicated.

The present invention has been made in consideration of the above points, and it is an object of the present invention to propose an image stabilization device that can effectively avoid image quality deterioration with a simple configuration.

Elle! ! ! Means for Solving the Problems In order to solve this problem, the present invention includes an image sensor 4 that outputs a video signal SS of a captured image formed in the imaging region M2, a memory circuit 6 that stores the video signal SS,
A camera shake amount detection circuit 8.10.12.14 that detects the camera shake amount and outputs the camera shake amount detection result, and a memory control circuit that sequentially reads out the video signal SS stored in the memory circuit 6 based on the camera shake amount detection result. 16.18.20, the memory control circuit 16.18.20 reads the video signal SS from the memory circuit 6 so as to cut out the captured image,
The image sensor 4 forms a large imaging area M2 since the memory control circuit 20 cuts out and outputs the captured image.

The video signal S is sent from the memory circuit 6 so as to cut out the two-effect captured image.
If S is read out, the area of the loss image region M2 is set large, and the video signal SS is output, camera shake can be corrected without scaling the image, and image quality deterioration can be effectively prevented with a correspondingly simple configuration. can be avoided.

G example An embodiment of the present invention will be described in detail below with reference to the drawings.

In FIG. 1, Jl generally indicates a camera-integrated video tape recorder, which forms an image of a subject P through a lens 2 on the imaging surface of an imaging device 4.

As shown in FIG. 2, the image sensor 4 is set so that the area M2 of a region (hereinafter referred to as an image sensor) that can convert a captured image into a video signal is larger than that of a normal image sensor (Ml). As a result, compared to, for example, a case where an NTSC video signal is generated from an output signal of an image sensor, video signals with larger angles of view in the upper, lower, left, and right directions can be formed.

The memory circuit 6 is constituted by a field memory circuit, and sequentially stores the image signal SS output from the image sensor 4 in a predetermined area.

Furthermore, the memory circuit 6 outputs the stored image signal SV based on the address data output from the memory control circuit 20, converts it into a recording signal in the subsequent signal processing circuit, and records it on the magnetic tape.

At this time, as shown in FIG. 3, the memory circuit 6 uses the video signal S to cut out images Mll, Ml2, and Ml3 at normal angles of view from the image M2 at a large angle of view taken by the image sensor 4. (2), thereby making it possible to output an image pickup signal S (2) corrected for camera shake.

That is, the X direction and Y direction acceleration sensors 8 and 10 are
Detects acceleration in the horizontal and vertical directions, respectively.

Integrating circuits 12 and 14 integrate the detection results of acceleration sensors 8 and 10 twice and output the integrated results, thereby detecting the amount of camera shake in the horizontal and vertical directions, respectively, based on the accelerations in the horizontal and vertical directions.

By detecting the amount of camera shake based on the detection results of the acceleration sensors 8 and 10, the motion vector detection means can be omitted, and camera shake can be corrected with a correspondingly simpler configuration.

The correction data generation circuits 16 and 18 output address correction data based on the detection results of the amount of camera shake in the horizontal and vertical directions, respectively.

The memory control circuit 20 sets address data A to start reading from the memory circuit 6 based on the address correction data.
DI 1. Correct ADI2 and ADI3 and set the address data AD11, ADI2, and ADI3 at the start of reading.
The read address data starting from is output to the memory circuit 6.

Thereby, the memory control circuit 20 is able to correct the camera shake by displacing the cropped image by the amount of camera shake.

Therefore, since the image is cut out and output, scaling of the image can be omitted and image loss can be prevented, and a drop in image quality can be effectively avoided and camera shake can be corrected with a simple configuration.

(Thus, in this embodiment, the X- and Y-direction acceleration sensors 8 and 10 and the integrating circuits 12 and 14 constitute a camera shake amount detection circuit that detects the amount of camera shake and outputs the camera shake amount detection result.) , correction data generation circuit 16.18
The memory control circuit 20 constitutes a memory control circuit that sequentially reads out the video signals stored in the memory circuit 6 based on the detection result of the amount of camera shake.

In the above configuration, the X direction and Y direction acceleration sensor 8
The horizontal and vertical accelerations detected in and 10 are integrated twice by integration circuits 12 and 14, and the amounts of camera shake in the horizontal and vertical directions are detected, respectively.

The detection results are output to the correction data generation circuits 16 and 18, where they are converted into address correction data, and then output to the memory control circuit 20.

The memory control circuit 20 sequentially outputs read address data to the memory circuit 6 based on the address correction data.

On the other hand, the memory circuit 6 is configured to store captured images with a large angle of view, and sequentially outputs the captured image signal SS based on the read address data generated based on the address correction data. , a captured image is cropped and output from a position displaced by the amount of camera shake, and camera shake can be corrected with a simple configuration that is good for this purpose.

According to the above configuration, a captured image with a large angle of view is stored in a memory circuit, and is cut out and output from a displaced position based on the camera shake detection result, thereby effectively avoiding image quality deterioration and eliminating camera shake with a simple configuration. Can be corrected.

Furthermore, in the above-described embodiment, a case has been described in which a field memory circuit is used as the memory circuit 6, but the present invention is not limited to this, and for example, a frame memory circuit may be used.

Further, in the above-described embodiments, a case has been described in which the present invention is applied to a camera-integrated video tape recorder, but the present invention is not limited to this, but can be widely applied to imaging devices such as television cameras.

Effects of the Invention As described above, according to the present invention, a large area is imaged in advance and stored in a memory circuit, and the image is enlarged/reduced by cutting out and displaying the captured image based on the result of detecting the amount of camera shake. It is possible to obtain a camera shake correction device that can correct camera shake by omitting the above, and can effectively avoid image quality deterioration with a correspondingly simple configuration.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a camera-integrated video tape recorder according to an embodiment of the present invention, and FIGS. 2 and 3 are route diagrams for explaining its operation. 1...Camera integrated video cheap recorder, 4
...Image sensor, 6...Memory circuit, 8
．． 1o... Acceleration sensor, 12, 4... Integrating circuit, 16, 8... Correction data generation circuit, 20... Memory control circuit. Agent Megumi Tanabe! Picture shooting bag + 0 shooting girl face ll1Ll road nt blade out diagram bamboo prisoner

Claims (1)

[Scope of Claims] An image sensor that outputs a video signal of a captured image formed in an imaging area, a memory circuit that stores the video signal, and a camera shake amount detector that detects a camera shake amount and outputs a camera shake amount detection result. circuit, and a memory control circuit that sequentially reads out the video signal stored in the memory circuit based on the camera shake amount detection result, and the memory control circuit reads the video signal from the memory circuit so as to cut out the captured image. An image stabilization device that reads out a video signal, and wherein the imaging element has a large imaging area so that the memory control circuit cuts out and outputs the captured image.