用模板匹配法选取光斑质心探测窗口

The Use of Template Matching for Hartman Sensor Spot Centroid Detection Window

根据Hartman传感器探测人眼波像差时的光斑特点,提出了模板匹配法选取光斑窗口的质心探测方法。本方法与Prieto的质心探测方法相比,提高了质心探测精度。对光斑阵列的仿真计算结果表明,用本文提出的方法质心探测误差的rms值降低了53.7%。另外,本方法还避免了Prieto方法中多次迭代的质心计算,减少了运算量。

The method of Prietos progressively reducing window size was analysed,and the template matching method was suggested according to the feature of the light spots of Hartman sensor.With template matching,the accuracy of centroid detection is improved.The computer simulation of the centroid calculations of spot array shows that the centroids rms error can decrease by 53.7 %.In addition,template matching method avoides iterative centroid calculations,and so reduces computer time consuming.