Fisheye-camera calibration system based on genetic algorithm and image distortion correction method thereof

A fisheye camera and genetic algorithm technology, applied in the fields of genetic law, image analysis, image enhancement, etc., can solve the problems of complex calibration method, inaccurate calibration parameters, fisheye image distortion, etc. measured effect

Pending Publication Date: 2017-05-17
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0004] In order to overcome the shortcomings of fisheye image distortion, complex calibration method and inaccurate calibration parameters, a fisheye camera calibration system based on genetic algorithm and its image distortion correction method are proposed.

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  • Fisheye-camera calibration system based on genetic algorithm and image distortion correction method thereof
  • Fisheye-camera calibration system based on genetic algorithm and image distortion correction method thereof

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[0035] The invention will be described in further detail below in conjunction with the accompanying drawings.

[0036] The whole fisheye camera calibration system is as follows: figure 1 As shown, it contains three processing modules, which are distortion correction module, feature detection module and fisheye camera parameter calibration module.

[0037] (1) Distortion correction module: preprocess the image, mainly including distortion correction using the pinhole imaging contrast correction method; used to eliminate the distortion of the original fisheye image and reduce the calculation of the distortion coefficient in the fisheye camera parameter calibration module ;

[0038] (2) Feature detection module: quadrilateral fitting, Harris corner point detection; used to provide stable feature points, as the expected reference point in the fisheye camera parameter calibration module;

[0039] (3) Fisheye camera parameter calibration module: This module takes the theoretical i...

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Abstract

The invention relates to a fisheye-camera calibration system based on the genetic algorithm and an image distortion correction method thereof, and belongs to the technical field of computer graphics, digital image processing and the artificial intelligence algorithm. The fisheye-camera calibration system comprises a distortion correction module, a feature detection module and a fisheye-camera parameter calibration module which are sequentially connected. The image distortion correction method includes the steps of image pretreatment, Harris corner point detection and genetic-algorithm internal-reference and external-reference approaching. By means of the fisheye-camera calibration system based on the genetic algorithm and the image distortion correction method thereof, calibration parameters can be reduced, and the accuracy of the calibration internal reference and the accuracy of the calibration external reference are increased.

Description

technical field [0001] The invention relates to a fisheye camera calibration system based on a genetic algorithm and an image distortion correction method thereof, belonging to the technical fields of computer graphics, digital image processing and artificial intelligence algorithms. Background technique [0002] There are many methods for fisheye image distortion correction, among which the literature (fisheye image distortion correction method based on double longitude model [J]. Chinese Journal of Instrumentation, 2015, 02: 377-385) proposes to convert the double longitude spherical model into a planar model The method uses the barrel distortion characteristics of the fisheye image to achieve fast distortion correction. However, although the rectified image returned to a normal image in the middle, it was severely stretched at the poles. The longitude and latitude model correction proposed in the literature (A fisheye image correction design method using longitude and la...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/80G06N3/12G06T5/00
CPCG06N3/126G06T5/006
Inventor 吴庆宪孙诚李轶锟郑文超
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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