摘要
在图象识别原理的基础上 ,提出频率域数字散斑相关法 ,该方法在频率域物体变形前后散斑图对应子区域的相关搜索 ,完成测量物体的变形位移。该法与常用的空间域数字相关法相比 ,避免了相关识别中的反复搜索 ,极大地减小了运算量 ,提高了信息提取速度 ,并且具有更高的定位精度和测量精度。文章最后给出了典型测试结果。
Frequency domain digital speckle correlation method is put forward on the basis of the image recognition principle.The method carries out the related searching in the corresponding sub images of the speckle patterns before and after the object deformation in frequency domain.Compared with the common spatial domain digital correlation method,the method avoids the repeated searching in the correlation recognition,thus the operation quantity is largely reduced and the information extracting speed in improved.This method also has higher positioning accuracy and measuring accuracy.The typical measuring results are given in the paper.
出处
《光电工程》
CAS
CSCD
2000年第3期65-68,共4页
Opto-Electronic Engineering
基金
山东省科委基金资助项目!( 95 14 2 63 8)
关键词
数字散斑
图象识别
频率域数字散斑
Digital speckles
Fast Fourier transforms
Deformation measurement
Image recognition.
