光滑物体表面反射光偏振特征分析及反射光分离技术  

Analysis of polarization characteristics of reflected lights on smooth object surface and separation of reflected lights

作　　者：张焱[1] 张景华 石志广[1] 张宇[1] 凌峰 刘荻 索玉昌 师晓冉 ZHANG Yan;ZHANG Jinghua;SHI Zhiguang;ZHANG Yu;LING Feng;LIU Di;SUO Yuchang;SHI Xiaoran(National Key Laboratory of Science and Technology on Automatic Target Recognition, College of Electronic Science and Technology, National University of Defense Technology, Changsha 410073, China)

机构地区：[1]国防科技大学电子科学学院ATR国防科技重点实验室,湖南长沙410073

出　　处：《国防科技大学学报》2021年第6期135-144,共10页Journal of National University of Defense Technology

基　　金：国家自然科学基金资助项目(62075239,61302145);国家部委基金资助项目(9140C800302KG01)。

摘　　要：物体表面反射光由镜面反射光和漫反射光组成,针对光滑物体表面镜面反射光和漫反射光的分离问题,建立了一个结合镜面反射和漫反射共同作用的偏振态表征模型,并使用该模型对混合反射区域偏振特征进行分析。基于镜面反射光和漫反射光的偏振特征,根据镜面反射光和漫反射光在光滑物体表面垂直方向及平行方向上的分布关系,采用偏振正交分解的方法实现了镜面反射成分和漫反射成分的求解。利用镜面反射光图像和漫反射光图像之间的相关性,通过梯度下降算法得到镜面反射成分和漫反射成分归一化互相关最小值及其对应的镜面反射偏振度和漫反射偏振度,从而实现反射光的分离。通过对不同场景中获取的反射光图像进行测试,实验结果表明,该算法具有较好的反射光分离效果。Reflected lights on object surfaces are composed of specular and diffuse reflection lights.To separate the specular and diffuse reflection lights on a smooth object surface,a polarization state characterization model based on the collaborative effect of specular and diffuse reflections was proposed and was used to analyze the polarization characteristics in a mixed reflection region.Based on their polarization characteristics and their distribution relations perpendicular and parallel to the smooth object surface,the specular and diffuse reflection lights were separated by polarization orthogonal decomposition.According to the correlation features between the specular and diffuse reflection components,the normalized correlation minimum between the specular and diffuse reflection lights and its corresponding to the degrees of specular and diffuse reflection polarization were calculated by the gradient descent algorithm,thus enabling the successful separation of the reflected lights.By testing reflected light images obtained from different scenes,the results indicate that the proposed algorithm could effectively separate reflection lights.

关 键 词：镜面反射 漫反射 反射光分离 偏振特征 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]