一种基于径向基函数的图像预畸变算法  

An Image Pre⁃distortion Algorithm Based on the Radial Basis Function

作　　者：黄晓波 严利民[1,2] HUANG Xiaobo;YAN Limin(School of Mechatronic Engineering and Automation,Shanghai University,Shanghai 200444,CHN;Microelectronics Research and Development Center,Shanghai University,Shanghai 200444,CHN)

机构地区：[1]上海大学机电工程与自动化学院,上海200444 [2]上海大学微电子研究与开发中心,上海200444

出　　处：《光电子技术》2023年第4期332-336,共5页Optoelectronic Technology

摘　　要：为了校正近眼显示中的畸变图像,提出了一种基于非线性拟合和向前映射插值的图像预畸变算法。采用了径向基函数拟合算法,以得到更高精度的拟合原图像和预畸变图像之间的映射关系;采用了基于向前映射的紧支撑径向基函数插值算法进行图像灰度重建,以得到更好的图像畸变校正效果。实验结果表明,径向基函数拟合算法的拟合误差可以降到1像素以内,校正精度达到亚像素级;预畸变算法对近眼光学系统产生畸变具有良好的校正效果,显示图像清晰完整。In order to correct distorted images in near-eye display,an image pre-distortion algo-rithm based on nonlinear fitting and forward mapping interpolation was proposed.The radial basis function fitting algorithm was used to get a more precise mapping relationship between the fitting origi-nal image and the pre-distorted image.The compactly supported radial basis function(CSRBF)inter-polation algorithm based on forward mapping was used for image gray reconstruction to obtain better correction effect of image distortion.The experimental results showed that the fitting error of the radi-al basis function fitting algorithm could be reduced to less than 1 pixel,reaching to sub-pixel level.The pre-distortion algorithm had a good correction effect on the distortion produced by the near-eye optical system,which could make the display image clear and complete.

关 键 词：近眼显示 图像预畸变 径向基函数拟合算法 插值算法 

分 类 号：TN27[电子电信—物理电子学] TP751.1[自动化与计算机技术—检测技术与自动化装置]