基于光纤探头的光电图像径向畸变校正方法  

Optical image radial distortion method based onoptical fiber probe

作　　者：李夕雯 张可人 赵建府 LI Xiwen;ZHANG Keren;ZHAO Jianfu(Chengdu College,University of Electronic Science and Technology of China,Chengdu 611731,China)

机构地区：[1]电子科技大学成都学院,成都611731

出　　处：《激光杂志》2023年第12期207-211,共5页Laser Journal

基　　金：四川省科技厅项目(No.2021JDKP0077)。

摘　　要：随着光电图像的广泛应用,图像畸变所带来的弊端日渐突显,为减少图像畸变影响,提升光电图像径向畸变校正效果,降低校正后失真程度,提出一种基于光纤探头的光电图像径向畸变校正方法。分析光纤探头的成像原理,确定被拍摄物体理想位置与发生畸变后位置的映射关系,根据径向RAC的摄像机标定方法构建光电图像畸变模型,根据畸变模型求逆解算得光电图像的径向畸变程度,光电图像畸变损失的计算,根据直线投影不变性原理构建光电图像的畸变损失函数,采用Levenberg-Marguardt算法对函数求解,获得最优畸变系数,实现光电图像径向畸变校正。实验结果表明,所提方法校正时图像旋转角度小,校正后失真程度小,更符合人眼的视觉习惯。With the wide application of photoelectric images,the disadvantages brought by image distortion become increasingly prominent.In order to reduce the impact of image distortion,improve the correction effect of photoelectric image radial distortion,and reduce the distortion after correction,this paper proposes a method of photoelectric image radial distortion correction based on optical fiber probe.The imaging principle of optical fiber probe was analyzed,and the mapping relationship between the ideal position of the photographed object and the distorted position was determined.According to the camera calibration method of radial RAC,the photoelectric image distortion model was constructed.According to the distortion model,the radial distortion degree of the photoelectric image calculated by inverse solution was calculated,and the photoelectric image distortion loss was calculated.According to the principle of linear projection invariance,the distortion loss function of optoelectronic image is constructed,and the Levenberg-Marguardt algorithm is used to solve the function,and the optimal distortion coefficient is obtained,and the radial distortion correction of optoelectronic image is realized.The experimental results show that the proposed method has a small rotation Angle and a small distortion after correction,which is more consistent with the visual habits of human eyes.

关 键 词：光纤探头 光电图像 径向畸变 畸变校正 Levenberg-Marguardt算法 

分 类 号：TN911[电子电信—通信与信息系统]