利用光度立体法确定的表面法线误差灵敏度分析与校正

ERROR SENSITIVITY ANALYSIS AND CORRECTION FOR SURFACE NORMALS DETERMINED BY PHOTOMETRIC STEREO METHOD

利用光度立体法不需要复杂计算就能确定景物内３Ｄ物体的表面方向，但容易产生许多误差．为克服这一问题，文中着重研究与分析几种主要误差，提出新的误差灵敏度分析算法．利用这种新算法，使推导过程变得极为简单并能导出十分严密的表面法线灵敏度计算公式．经试验证明，所得结果与光度立体理论完全一致．

The surface orientation of a 3-D object in a scene can be determined by thephotometric stereo method without the need of complicated computation,but thismethod is susceptible to a number of errors.In this paper, we not only discussand analyse several kinds of major errors, but propose a new algorithm for errorsensitivity analysis.This new one leads to a mush simpler derivation processand substantially rigorous sensitivity formula.It is demonstrated that theexperimental results are fully consistent with the photometric stereo theory.