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:
2006 International Symposium on Intelligent Signal Processing and Communications
影响因子:
--
通讯作者:
S. Nagashima;T. Aoki;T. Higuchi;K. Kobayashi
S. Nagashima;T. Aoki;T. Higuchi;K. Kobayashi
中科院分区:
其他
文献类型:
--
作者:
S. Nagashima;T. Aoki;T. Higuchi;K. Kobayashi

文献摘要

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本文提出了一种高精度的图像匹配技术,使用相位相关(POC)功能。基于POC的图像匹配通过使用POC函数的峰值的闭合形式表示的函数拟合技术,使得能够以1/10~1/100像素的精度估计图像位移。这种方法需要一个迭代过程的非线性函数拟合,导致长的计算时间。在本文中,我们提出了一个峰值评估公式(PEF),直接估计相关峰的位置从实际的二维数据阵列的POC功能。实验结果表明,该方法在不牺牲图像匹配精度的前提下,减少了计算时间
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