The CCD is used to scan the moving spackle picture through the image acquisition board.Two parameters of optimum sampling, pixel and image displacement, are obtained by data analysis.

• 用图像采集卡采集CCD扫描数散斑图像得到的图像,将图像数字化,分析数据得到了图像最优采样的像素单元和图像位移两个参量。