Method and device for image perspective correction

Abstract

The invention discloses a method and a device for image perspective correction. The method comprises that a first image which contains four control points and is shot by a camera is acquired, wherein the four control points form a square in a plane scene, each of the four control points is a gravity center of a corresponding preset dual-color regular circle, a first color is arranged in the inner circle region of the dual-color regular circles, a second color which is different from the first color is arranged in the outer circle region of the dual-color regular circles, the first image is in a rectangular coordinate system, coordinates of the four control points are determined through the dual-color regular circles, the double vanishing point correction is conducted to the first image in accordance with the irregular quadrangle which is formed by the four control points in the first image, a second image which corresponds to the plane scene is formed, and then the perspective correction treatment of the first image is completed. Therefore, by the aid of the technical scheme, vanishing points are eliminated, and the image perspective correction is achieved under the condition of two point perspective.

Description

technical field [0001] The invention relates to the technical field of monitoring, in particular to an image perspective correction method and device. Background technique [0002] As an important component of the security system, video surveillance is a comprehensive system with strong preventive capabilities. Video surveillance is widely used in many occasions due to its advantages of intuition, accuracy, timeliness and rich information. In recent years, with the rapid development of computer, network, image processing and transmission technology, video surveillance technology has made great progress. [0003] And because the images collected by cameras, such as monocular cameras, etc., have the characteristics that the near side is large and the far side is small, so that the plane scene captured by the camera will appear in one-point perspective or two-point perspective. Among them, such as figure 1 As shown, when the shooting posture of the camera is appropriate, the ...

AI Technical Summary

Problems solved by technology

[0004] Due to the two-point perspective of the image captured by the camera in practical applications, the accuracy is reduced when using the image to locate the target object (fire source, criminal, etc.)

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