基于微区统计特性的数字散斑相关测量亚像素位移梯度算法  

Gradient algorithm based on subpixel displacement of DSCM considering the statistical characterization of micro-region

作　　者：张军[1] 金观昌[1] 马少鹏[1] 孟利波[1] 

机构地区：[1]清华大学工程力学系,北京100084

出　　处：《光学技术》2003年第4期467-472,共6页Optical Technique

摘　　要：提出了一种形式简单、求解快速、稳定性好和精度高的用于数字散斑相关方法亚像素位移求解的微区梯度算法。介绍了算法原理,并给出了四种不同模式的算法公式。采用模拟图像,介绍了四种模式在计算时间、计算子窗口时对结果的影响,并对适用范围和求解精度等方面进行了分析对比。最后的计算实例验证了算法的可行性和优越性。A high efficient, well stable and high precise gradient algorithm is developed to determine the subpixel displacement of DSCM. The algorism principle is introduced, and four different modes of the algorithm are given. The four modes are studied on the computation time, the influence of microregion size , as well as the accuracy and the applicability of the algorism by using the simulated images. The feasibility and superiority of the algorithm are verified through an instance finally.

关 键 词：数字散斑相关测量 亚像素 梯度算法 位移 光学测量 微区统计特性 

分 类 号：O348.1[理学—固体力学]