Image correction method and device for perspective imaging distortion of cylindrical object

Abstract

The invention discloses an image correction method and device for perspective imaging distortion of a cylindrical object. The method comprises the following steps: 1, finding side lines at two sides of the cylindrical object, and independently extracting an image region of the cylindrical object; 2, establishing a coordinate system for the cylindrical object image area according to the height center line and the width center line of the shot original image; 3, solving the angle of the cylindrical object obtained by shooting according to the shooting focal length of the camera and the positivedirection width of the image area of the cylindrical object, and solving the distance between the center of the cylindrical object and the focus by combining the radius of the cylindrical object; enabling each point on the perspective distortion image of the cylindrical object to correspond to each point on the corrected image so as to correct the perspective distortion image. The invention further provides an image correction system for perspective imaging distortion of the cylindrical object, terminal equipment and a computer readable storage medium. According to the image correction methodand device disclosed in the invention, the measurement of the shape, texture or damage size of the cylindrical curved surface is more accurate.

Description

technical field [0001] The invention belongs to the field of image processing, and relates to an image correction method and equipment for distortion in perspective imaging of cylindrical objects. Background technique [0002] In 2010, researchers at Tianjin University of Science and Technology proposed a three-dimensional object surface texture reconstruction method based on cylindrical back-projection algorithm. This method only equates the shooting conditions of cylindrical objects with telecentric lens imaging models. Occupying a small proportion, it is not applicable to a large number of pinhole imaging models in engineering. At present, the detection technology based on image processing has become the research direction of a large number of scientific researchers, and many new technologies and new devices have emerged. When detecting the surface of a cylindrical object, there is no simple and effective method to correct the deformation of the image of the cylindrical ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the distorted image is not corrected when the surface of the cylindrical object is detected in the above-mentioned prior art, and to provide an image correction method and equipment for the distortion of the perspective imaging of the cylindrical object, so as to avoid the occurrence of detection results Large errors allow for more accurate dimensioning of shape, texture, or damage on cylindrical surfaces

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