基于相位相关的亚像素图像配准

Sub-Pixel Image Registration Based on Phase Correlation

提出一种基于相位相关的图像对准方法,该方法精确度达到亚像素级别。相位相关是一种建立在傅立叶平移理论上的图像对准方法,通过计算两幅图像的傅里叶交叉能量谱得到两幅图像的位置差,对图像进行对准。将使用曲线拟合的思想对交叉能量谱的基础上进行进一步的运算,从而将相位相关方法的计算精度推广到亚像素级别。

Proposes an image registration method which can achieve sub-pixel accuracy based on phase correlation technology. Phase correlation is used as an image registration method on the basis of Fourier translation theory. The registration results of phase correlation are obtained by computing the Fourier cross-power spectrum of two images＆#39; displacement. Moreover, curve-fitting method is performed on the above mentioned cross-power spectrum to achieve sub-pixel accuracy.