摘要
该文针对一种新的基于相位相关的图像配准方法,在需要配准的两幅图像中心选取同样大小的区域,在对数极坐标的表示下,这两个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。首先可以利用相位相关法求得旋转角度和缩放因子,然后根据上一步求得的结果再次利用相位相关法求出两个方向上的平移参数,至此可以获得图像的配准参数。对Fourier-Mellin算法进行MATLAB仿真,实验结果表明了该算法可以获得较好的配准结果。
A novel method for imageregistration based on phase-correlation is proposed. Two same size patch needed to be cropped in the central patch of the two 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 signal. Firstly, rotation angle and scale factor can be calculated by phase-correlatlon method, then translation parameters of X axis and Y axis can be also calculated by thesame method basedon results＇of the previous step, from there, the regis- Yh tration parameters are obvious. Simulation results with Matlab provide well that Fourier-Mellin transform is meaningful.
出处
《杭州电子科技大学学报（自然科学版）》
2011年第4期185-187,共3页
Journal of Hangzhou Dianzi University：Natural Sciences
关键词
图像配准
相位相关
傅里叶变换
对数极坐标表示
二维脉冲信号
image registration
phase-correlation
Fourier transform
log-polar represen.tation
2-D impulse signal
