摘要
文章提出频率域数字激斑相关法 ,用该方法在频率域完成物体变形前后散斑图对应子区域的相关搜索 ,测量物体的变形位移 ,避免了空间域数字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。
In this paper,the digital correlation in the frequency domain is proposed.The correlation search of corresponded speckle subimages of before and after deformation is accomplished to measure object's displacement in the frequency domain.The speed of a cross-correlation calculation,however,is improved considerably by the performance of the digital correlation in the frequency domain with fast Fourier transform algorithms.A more accurate estimate of the location and measurement is obtained by the method.
出处
《应用激光》
CSCD
北大核心
2000年第4期179-181,共3页
Applied Laser
基金
山东省教委基金资助项目
关键词
数字散班
变形测量
频率域
digital speckle,fast fourier transform,deformation measurement,correlation
