基于相位相关和模板匹配的亚像素图像配准参数估计

针对图像配准中的亚像素参数估计问题,提出了一种相位相关和模板匹配相结合的方法。该方法先采用相位相关法进行粗配准,找到整像素平移;然后运用模板(窗口)匹配和基于最小二乘的曲面拟合法实现亚像素图像配准参数估计。通过实验表明该方法可以充分利用FFT的高效运算,达到亚像素精度。

The Subpixel Estimation of Image Registration Parameter Based on the Method of Phase Correlation and Template Matching

In order to deal with the problem of the estimation of image registration parameter,this thesis adapts the way of combining the methods of phase correlation and template matching.At first,phase correlation is adapted to realize registration for crude to find the entire pixel translation;secondly,the method of template matching and the fitting method of paraboloid surface based on least-squares are combined to fulfill the estimation of image registration parameter.Experiments show that the method takes full advantage of the high efficiency of FFT,and can also achieve sub-pixel accuracy can be achieved.