A Subpixel Image Matching Technique Using Phase-Only Correlation
A Subpixel Image Matching Technique Using Phase-Only Correlation
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DOI:
10.1109/ispacs.2006.364751
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发表时间:
2006-12
期刊:
影响因子:
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通讯作者:
S. Nagashima;T. Aoki;T. Higuchi;K. Kobayashi
中科院分区:
文献类型:
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作者:
S. Nagashima;T. Aoki;T. Higuchi;K. Kobayashi
This paper presents a high-accuracy image matching technique using a phase-only correlation (POC) function. The POC-based image matching enables estimation of image displacements with 1/10~1/100-pixel accuracy by a function fitting technique using the closed-form representation of the POC function's peak. This method requires an iterative process for the nonlinear function fitting, resulting in long computation times. In this paper, we propose a peak evaluation formula (PEF) that directly estimates the correlation peak location from actual 2-D data array of the POC function. Experimental evaluation shows that the proposed method reduces computation time without sacrificing image matching accuracy