基于条纹分析技术的镜头畸变校正实验设计

Experimental Design of Lens Distortion Correction Based on Fringe-pattern Analysis

针对光学条纹分析技术在镜头畸变检测校正中的拓展应用教学,设计一套镜头畸变校正实验检测与分析系统。方案在Matlab环境下实现对实验数值仿真及处理,并对镜头畸变模型及参数、畸变条纹基频、畸变中心等参量展开定量讨论分析。系统采用液晶平板显示器展示载频条纹图像作为校正模板,通过相机广角镜头进行拍摄获得畸变条纹图像,根据条纹分析方法获得各个畸变参量,实现对畸变图像的校正。方案将理论分析、数值仿真和实验测量三者相结合,帮助学生综合掌握条纹分析技术与镜头畸变校正的相关知识与应用,有利学生的实践动手能力和创新设计能力的培养。

Aiming at the extended application of optical fringe analysis technique in lens distortion detection and correction,an experimental detection and analysis system of lens distortion correction is designed.The program carries out the numerical simulation and experimental processing of the experimental system based on Matlab.Moreover,it carries out the quantitative discussion and analysis on the lens distortion model and the corresponding distortion parameters,the fundamental frequency of the distortion fringe,and the distortion center.The construction of the experimental system uses a flat-panel liquid crystal display to display the carrier frequency fringe image as a correction template,and then employs a charge-couple device camera with a wide-angle lens to capture the distorted fringe image.The corresponding distortion parameters are obtained by the fringe analysis method,and finally the distorted image achieves correction.The experimental scheme combines theoretical analysis,numerical simulation and experimental measurement to help students better grasp the knowledge and application of fringe analysis and lens distortion correction,and it is beneficial to the cultivation of students’ practical ability and innovative design ability.