Method for rectifying deviation of image

Abstract

The invention provides a method for rectifying a derivation of an image, which comprises three steps of mathematical modelling, calculation of reverse mapping coordinates and image recovery. An optical path distortion imaging function of a lens of a video camera taking the image is defined, and corresponding parameters of the image are calculated; a mapping relationship between an actual imaging coordinate and an ideal imaging space coordinate is calculated by using the optical path distortion imaging function; a coordinate system of the mapping relationship is converted into an image coordinate system; reverse coordinate points of the distorted images are searched; the undistorted images are covered and output by means of image interpolations; the complicated function calculation is displayed by the simple mapping relationship of the image coordinates; the distorted images are analyzed automatically through conversion and mapping of various space coordinate systems by the method of combining the mathematical modelling and minimum error approaching analysis; all the required corrective parameters are extracted one by one and analyzed and stored on the basis of ensuring the arithmetic speed and the identification degree; and thus, the result integrates form, colour and quantity and the effect of rectifying the deviation of the image is improved.

Description

technical field [0001] The invention relates to image processing technology, in particular to a processing method for correcting distortion images. Background technique [0002] When digital cameras or mobile phones are used to take photos, business cards, texts and other materials, the captured images are often oblique. In addition, the original rectangular objects such as photos, business cards, and texts will be distorted and become arbitrary quadrilaterals. , especially when zoomed in. The first reason is that the photographer is not directly facing the object to be photographed, and there is a certain horizontal distance and deviation angle between him and the object to be photographed; the second is the difference of various data parameters of the shooting equipment, especially the lens parameters. The phenomenon of such distortion is very common, which makes it difficult for people to read and process data. [0003] The patent application number is 200410095109.4, a...

AI Technical Summary

Problems solved by technology

Although the invention can realize the function of automatic correction, the accuracy is relatively improved, but the degree of recognition is far from enough, and manual confirmation and judgment are required in the distortion processing, and the calculation method is very complicated, which will inevitably affect the speed of image processing. Influence, resulting in lower recognition rate, not enough humanized design, high cost

[0005] In addition, the familiar Photoshop software can also realize the image distortion correction function to a certain extent, but it has great limitations. First, it must be implemented on the

Images