新的闭式通用浮雕变换解算法在三维表面检测中的应用  

Novel closed-form GBR solution in application of three-dimensional surface detection

作　　者：林欣堂[1] 李艳东[2] 吴攀超[1] 

机构地区：[1]哈尔滨工程大学自动化学院,哈尔滨150001 [2]齐齐哈尔大学计算机与控制工程学院,齐齐哈尔161001

出　　处：《吉林大学学报（工学版）》2015年第6期1987-1993,共7页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金青年基金项目(61100103)

摘　　要：使用光度立体视觉法对物体表面形状进行检测时,往往需要解决通用浮雕变换(Generalized bas-relief,GBR)中参数解算及含有镜面、阴影等干扰的非朗伯目标表面这两个主要问题。针对非标定光度立体视觉中GBR参数的解算问题,提出了一种基于局部极大灰度值点的闭式解算法。与已有GBR解算方法相比,本文提出的算法只需要进行二元二次方程组的闭式计算,无需寻优或迭代过程,在计算速度及精度上有较大提高。对于非朗伯表面问题本文主要采用分割方法,还引入了主要成分分析法进一步去除干扰,使本文提出的闭式解算法能够满足使用条件。最后通过对实物目标的三维检测验证了本文算法的高效性。In object surface detection using photometric stereo algorithm,two main issues need to be solved;unknown Generalized Bas-Relief（GBR）parameters and surface containing mirror point,shadows and other interference.To solve incalibrated photometric stereo,a novel closed-form algorithm based on local maxima points is proposed to solve GBR parameters.The algorithm,which only solves group of dual quadratic equation without optimization or iterative process,greatly improves the speed and accuracy compared with the existing GBR solutions.To solve non-Lambertian surface issue,image segment and PCA technology are used to segment and remove interference to ensure the algorithm satisfying the application conditions.Higher accuracy and efficiency are proved by experiments.

关 键 词：信息处理技术 三维重建 非标定光源 光度立体视觉 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]