基于相关系数特性的实时匹配算法

提出了一种高精度的快速匹配算法。其基本思想是根据相关系数矩阵的特性来动态改变相关搜索步长的。对于已知目标特性和点扩展函数的情况,求出其理想情况下的相关系数矩阵函数,确定可信阈值和搜索步长;对于不知道目标特性和点扩展函数的情况,通过相关系数矩阵拟合函数或简单变步长法来确定可信阈值和搜索步长。在得到相关系数最大值后,拟合得到亚像素定位精度。与一般相关方法比较,该方法具有定位精度高、稳健性强和运算速度快等优点。

Real-time matching algorithm based on the property of correlation coefficients

A fast and high accuracy matching algorithm is presented.Its main idea is to alter the correlation-searching step based on the property of correlation coefficients.If the target's property and PSF is known,its ideal correlation coefficient matrix can be got,then its credible threshold and searching step can be decided.If the target's property and PSF is unknown,its credible threshold and searching step can also be decided by using of fitting function of correlation coefficient matrix or simple altering-step methods.When the maximum value of the correlation coefficients is got,the sub-pixel location precision can be obtained by fitting method.In comparison with common correlation methods,this method's location precision is higher,it is more robust,and it takes less operation time.