光学学报, 2018, 38 (6): 0612006, 网络出版: 2018-07-09
基于遗传算法的数字图像相关法在微位移测量中的应用 下载: 841次
Application of Digital Image Correlation Method Based on Genetic Algorithm in Micro-Displacement Measurement
测量 数字图像相关法 微位移 匹配精度 搜索速度 遗传算法 measurement digital image correlation method micro-displacement matching precision searching speed genetic algorithm
摘要
对遗传算法、粒子群算法、人工鱼群算法三种整像素搜索算法在微位移测量中的应用进行了对比研究。以相关系数大小衡量图像的匹配精度,选择归一化互相关函数作为相关系数及算法的目标函数;对目标函数进行迭代求解,得到了整像素的微位移;以模拟散斑图为研究对象,对三种算法的匹配精度、搜索速度、微位移测量结果进行了对比分析。结果表明,遗传算法在匹配精度、搜索速度及微位移测量精度上具有明显的优势,能满足数字图像相关法在微位移测量中的应用需求。
Abstract
Three integer pixel search algorithms of genetic algorithm, particle swarm optimization, and artificial fish swarm algorithm applied in the micro-displacement measurement are studied and compared. The matching precision of the images is evaluated by the size of the correlation coefficient and the normalized cross-correlation function is selected as the correlation coefficient and the objective function of algorithms. The objective function is iteratively solved to obtain the micro-displacement result of the integer pixels. The simulated speckle pattern is taken as the research object, and the matching precision, searching speed, and micro-displacement measurement results for these three algorithms are compared and analyzed. The results show that the genetic algorithm has obvious advantages in the matching precision, searching speed and micro-displacement measurement precision, which can meet the application requirements of the digital image correlation method in the micro-displacement measurement.
葛朋祥, 叶沛, 李桂华. 基于遗传算法的数字图像相关法在微位移测量中的应用[J]. 光学学报, 2018, 38(6): 0612006. Pengxiang Ge, Pei Ye, Guihua Li. Application of Digital Image Correlation Method Based on Genetic Algorithm in Micro-Displacement Measurement[J]. Acta Optica Sinica, 2018, 38(6): 0612006.