Method and system for measuring distortion of lens

Abstract

The invention discloses a method and system for measuring distortion of a lens. The method comprises the steps that a testing card provided with a dot matrix composed of K*N points is set, wherein K and N are natural numbers, and K is equal to or not equal to N; a distortion image produced after the lens is distorted is obtained through the testing card; the point at the top left corner of the distortion image is the origin of coordinates, and a plane coordinate system of the distortion image is established with the rightward direction of the origin of coordinates as the forward X-axis direction and the downward direction of the origin of coordinates as the forward Y-axis direction; the coordinates of the center point of the distortion image and all non-center points are scanned, retrieved and positioned, and the coordinate values of the center point and all the non-center points in the plane coordinate system are determined; the distortion amount of the distortion image is calculated according to the coordinate values of the center point and all the non-center points and the distortion amount calculating formula of the distortion image, and therefore the distortion amount of the lens is obtained. The method and system can rapidly and accurately position black points of the testing card, and the measuring precision of the lens distortion is improved while the image processing speed is improved.

Description

technical field [0001] The invention relates to image processing in the field, in particular to a method and system for measuring lens distortion. Background technique [0002] With the advancement of science and technology, consumer electronic products have entered human life at a rapid pace, and head-mounted display products have attracted the attention of the public with their gorgeous appearance and advanced functions. Head-mounted display products perfectly apply visual technology to products, which use high-resolution LCD screens to display images, which are magnified by lenses so that users can watch clear images; and use 3D technology to process images, allowing users to experience 3D belt Come to the visual impact. However, when the lens magnifies the image, it also distorts the image. The distortion belongs to the geometric distortion of imaging. From the center of the picture to the edge of the picture, it increases successively, and it is mainly reflected more ...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a method and system for measuring lens distortion to solve the problems of slow calculation speed and low measurement accuracy of the existing lens distortion measurement method

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