Abstract：In order to solve the contradiction of mutual restriction between high spatial resolution and large field of industrial cameras highlighted in the visual measurement of fine-pitch gear, sub-pixel image registration method based on phase correlation is studied. The cause of the phenomenon that main peak and sub peak produced when inverse Fourier transform the cross power spectrum is analyzed. The corresponding relationship between peak amplitude and relative displacement is described finally. The method was applied to image registration of the fine-pitch gear, the result shows that the error was less than 0.002 pixels.The error of this method is analyzed without considering the influence of incoherent regions and the experimental result shows that this method exists non-cumulative error whose period is 1 pixel, the error introduced by function approximation is less than 5×10-8 pixels.
李继哲,朱维斌,叶树亮. 基于信号采样的相位相关法亚像素级配准方法研究[J]. 计量学报, 2019, 40(4): 589-594.
LI Ji-zhe,ZHU Wei-bin,YE Shu-liang. Research on Sub-pixel Registration Method Based on Phase Correlation and Signal Sampling. Acta Metrologica Sinica, 2019, 40(4): 589-594.
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2019, Vol. 40 
