基于相位相关的图像配准算法

提出了一种新的基于相位相关的图像配准方法：首先在参考图像中心处截取一个小区域图像，然后在待配准图像中寻找一个同样大小的区域，使得在对数极坐标表示下，这两个小区域图像的互功率谱经傅里叶反变换后是一个二维脉冲信号。所要寻找的小区域中心点在待配准图像中的位置即为所要估计的平移参数，二维脉冲信号中脉冲的位置与缩放因子和旋转角度有关，由此而得到图像配准参数。实验结果表明该方法具有很好的配准效果。

Image Registration Algorithm Based on Phase-Correlation

A novel method for image registration based on phase-correlation is proposed. Firstly, a central patch is cropped on the reference image, then the same size patch is found on the float image, which makes the inverse Fourier transform for the cross power spectrum of the two patches in log-polar representation be a 2-D impulse. The coordinate of the selected patch centre on the float image corresponds to the translated parameter exactly. And the impulse location can determine the scaled and rotated factors. Experimental results show that the algorithm has good performance.