A method and system for image distortion correction

Abstract

The invention discloses an image distortion correction method and a system. The method comprises following steps of: acquiring an image shot by a camera; Filling the boundary of the image; Camera calibration; Setting a plurality of correction coefficients between 0 and 1, and generating a plurality of camera correction internal parameters based on the correction coefficients; According to the camera external parameters and the camera correction internal parameters under different correction coefficients, the nonlinear distortion coordinate mapping matrix of each pixel of the original image after boundary filling is obtained, and the distortion coordinate mapping matrix is used for correction. Affine transformation is performed on the corrected image. The correction method of the inventionis fast and efficient, and can carry out distortion correction on medical endoscopic pictures in real time, and the corrected pictures are more in conformity with human eye view habit, which is helpful for doctors to read films and observe abnormal lesion parts, and improves the accuracy of doctors' diagnosis. Aiming at the visual difference of different people, the invention introduces a correction coefficient to achieve different correction effects, so as to be selected by a doctor.

Description

technical field [0001] The invention relates to the technical field of image processing, and is particularly suitable for the technical field of endoscopes, in particular to an endoscope image distortion correction method and system. Background technique [0002] In the application of medical endoscope, due to the relatively small body cavity of the human body, the hardware equipment of the medical endoscope is made very small. The body cavity of the human body is generally a tubular structure, and the endoscope needs to use a lens with a large field of view to image. After imaging with a lens with a large field of view and a short focal length, there is generally a certain amount of distortion in the image. Changes and distortions occur, generally including pincushion distortion, barrel distortion, etc. Image distortion has a certain impact on doctors' reading. Real-time distortion correction of medical endoscopic images can effectively improve the distortion and distortio...

AI Technical Summary

Problems solved by technology

Select sampling points on the fisheye projection curve of the scene line, but often cannot guarantee that all sampling points are strictly located on the curve

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