Processing method for correcting deviation of image

Abstract

The invention relates to a processing method for correcting the deviation of an image, comprises four steps of mathematical modeling, correction of distortional function parameters, calculation of reverse mapping coordinates and image recovery; the processing method further comprises the following steps of: according to the optical path aberration characteristic of the shooting lens, obtaining a distortional curve based on image coordinates through conversion; correcting the parameters through fitting method; calculating the mapping relation between practical imaging coordinates and ideal imaging coordinates; converting the coordinate system of the mapping relation into an image coordinate system; searching for the reverse coordinate points for the distortional image; and recovering and outputting a non-distortional image according to the image interpolation. In the invention, the complex aberration characteristic is analyzed and converted into the nonlinear curve-fitting question, and the image is zoomed while the deviation of the image is corrected; therefore, the video deviation in real time for images with different sizes is realized, and the errors of coordinate origin generated by the different manufacturing processes of different shooting modules can be corrected without needing to re-calculate the correction parameters; and the processing method is suitable for correcting images or videos with high resolution ratio, and the speed and precision of deviation correction are completely 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 pictures, 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 irregular. shape, 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 deviation angle from the object to be photographed; the second is that the data parameters of the shooting equipment, especially the lens parameters, are far apart , The phenomenon of this distortion is very common, which makes it difficult to accurately read and process people's data. [0003] The patent application number is 200410095109.4, and the patent name is image processi...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to address the technical defects existing in the prior art, make full use of the radial distortion characteristics of the lens, transform the problem of finding distortion features into a common and high-precision curve fitting problem, and convert complex and large-error targets The measurement is simplified to the greatest extent and the measurement error is eliminated, thus a high-precision and fast image correction method is proposed, which can realize the distortion correction of images and video files with different resolutions, without manual participation, automatic identification and adjustment, and response Fast, simple and convenient internal operation, significantly improving efficiency

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