基于测地学腐蚀的去包裹算法  

Unwrapping algorithm based on geodesic erosion

作　　者：李会雨[1] 李玉和[1] 李庆祥[1] 廖小华[1] 郑静琳[1] 

机构地区：[1]清华大学精密仪器与机械学系,北京100084

出　　处：《清华大学学报（自然科学版）》2006年第8期1381-1383,共3页Journal of Tsinghua University(Science and Technology)

基　　金：国家"九七三"重点基础研究项目(2003CB716201)

摘　　要：相位图像去包裹运算是三维形貌测量的重要环节,用于获得真实的相位分布。该文提出了基于测地学腐蚀的去包裹算法,首先根据包裹相位图像选取m ask与m arker图像,并在m ask图像的限制下对m arker图像进行测地学腐蚀运算,然后对腐蚀后图像的补集采取相同的腐蚀运算,以消除包裹相位图的阴影、断点等噪声,最后利用五帧去包裹算法对腐蚀预处理后的相位图进行相位恢复。实验表明,该方法有效地消除了相位图像中的断点、空洞和阴影等干扰因素,为实现高精度的表面形貌测量奠定了基础。Phase unwrapping is the process of determining the absolute phase given its principal value. An algorithm was developed to eliminating noise in the wrapping phase image such as abrupt phase changes, holes, and points with low modulation. The wrapping phase image is first processed with geodesic erosion with the wrapping phase image chosen as the mask image and the maximum of the image chosen as the marker image. Then the marker image is eroded according to the mask to acquire an image with the same process to get its complement. The resulting image is then unfolded through the traditional unwrapping procedure. Experiments show that the method effectively removes noise in the wrapping phase image and successfully produces the unwrapping phase image.

关 键 词：干涉仪 去包裹 测地学腐蚀 相位恢复 

分 类 号：TH741.13[机械工程—光学工程]