极值搜索法在数字相关性计算中的应用

通过对数字散斑相关性计算公式的分析，提出了计算相关性的极值搜索法，将平面上散斑的连续搜索变为离散搜索，将二维搜索变为一维搜索。同时，通过样条插值法完成非整数像素点的搜索。实验结果表明，该方法能明显提高散斑搜索的速度和灵敏度，并能达到满意的计算精度。

Application of Minimum Searching Method to Calculation of Digital Speckles 'Correlation

Minimum searching method is put forward by analyzing the calculating formulas of digital speckles' correlation. It transforms continuous searching of the speckles on the plane into discrete one and transforms two-dimension searching into one-dimension searching. Meanwhile, non-integer pixels are searched by interpolation method. The experimental results indicate that the method can apparently raise the speed and sensitivity of speckle searching and calculating precision can be assured.