JPH05252431A - Video camera - Google Patents

Abstract

PURPOSE:To execute a correction of inclination of an image, and also, to automatize the correction of the inclination from the horizontal plane. CONSTITUTION:An angle sensor 8 detects an angle of an inclination of the camera against the horizontal direction and inputs it to a control microcomputer 9. The control microcomputer 9 allows a memory 6 to fetch image data from an A/D converter 2, and allows an interpolating circuit 7 to calculate image data allowed to conform to the horizontal direction from its data. The calculated image data is inputted to a digital signal computing element 3, the same signal processing as regular image data is executed to its data, and it is converted to a video signal output. As a result, even in an unstable state at the time of hand-held photographing, etc., by a video camera, a screen is held horizontally, therefore, photographing is executed easily.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to image correction in video cameras.

[0002]

2. Description of the Related Art A conventional technique is disclosed in Japanese Patent Laid-Open No. 1-125064.
As described in Japanese Patent Publication, the vertical pitch and horizontal swing of the camera are corrected.

[0003]

The above-mentioned prior art has a drawback in that the motion of the image that can be corrected cannot cope with the tilting motion of the image itself due to only pitching and horizontal shaking.

A first object of the present invention is to enable correction of image tilt, and a second object is to automate the correction of tilt from a horizontal plane.

[0005]

An object of the present invention is to provide an angle sensor for measuring the tilt of the camera itself, a memory capable of storing a digitized video signal and reading an image having an arbitrary tilt, a memory. This is achieved by providing an interpolation circuit that interpolates output image data.

[0006]

The angle sensor measures the tilt of the camera itself. The memory digitizes the video signal, fetches it, and reads it in the order of canceling the tilt of the camera to output an image in which the horizontal directions are aligned. The read data is interpolated by the interpolation circuit.

As a result, the tilt of the video signal of the camera is corrected.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a camera.

When the inclination correction is not performed, the image signal from the sensor 1 is digitized by the A / D converter 2, processed by the digital signal calculator 3, and output to the video signal output 5 by the D / A converter 4. Convert and output.

When performing the tilt correction, the angle sensor 8 detects the angle 12 of the tilt of the camera with respect to the horizontal direction 10 and inputs it to the control microcomputer 9. The control microcomputer 9 inputs the image data from the A / D converter 2 to the memory 6, and the horizontal direction 1
The image data set to 0 is output to the interpolation circuit 7.

An example of the calculation method is shown in FIG.

The scanning direction 11 of the image data 13 stored in the memory 6 has an angle 12 with respect to the horizontal direction 10 which is equal to the inclination of the camera. The coordinates of the tilt correction image data 14 with respect to the horizontal direction 10 are set on the image data 13, and the individual data of the image data 14 are represented by the ratio of the two values of the image data 13 at the closest distance and the distance. Are sequentially created by the interpolation circuit 9 based on the weighting by.

The calculated image data 14 is input to the digital signal calculator 3 and the same signal processing as that for normal image data is performed to produce a video signal output.

[0015]

According to the present invention, since the screen is kept horizontal even in an unstable state such as a handheld shooting with a video camera, shooting becomes easy.

[Brief description of drawings]

FIG. 1 is a block diagram of a camera.

FIG. 2 is an explanatory diagram of signal reading.

[Explanation of symbols]

1 ... Sensor, 2 ... A / D converter, 3 ... Digital signal calculator, 4 ... D / A converter, 5 ... Video signal output, 6 ... Memory, 7 ... Interpolation circuit, 8 ... Angle sensor, 9 ... Control Microcomputer, 10 ... Horizontal direction, 11 ... Camera image scanning direction, 1
2 ... Camera tilt angle, 13 ... Camera image data, 14
... Image data with tilt corrected.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shinji Kishino 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Stock company Hitachi Image Information Systems (72) Inventor Yasunori Kaminae 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Hitachi Image Information System Co., Ltd.

Claims (1)

[Claims] 1. A video camera having a digital signal calculator, comprising an angle sensor for detecting an angle of inclination of the camera with respect to a horizontal direction, and a memory for storing a digitized video signal and reading a screen having an arbitrary inclination. , A video camera having an interpolation circuit for interpolating image data in a memory.