Subpixel Registration Directly from the Phase Difference
نویسندگان
چکیده
منابع مشابه
Subpixel Registration Directly from the Phase Difference
This paper proposes a new approach to subpixel registration, under local/global shifts or rotation, using the phase-difference matrix.We establish the exact relationship between the continuous and the discrete phase difference of two shifted images and show that their discrete phase difference is a 2-dimensional sawtooth signal. As a result, the exact shifts or rotations can be determined to su...
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In this paper, we have derived analytic expressions for the phase correlation of downsampled images. We have shown that for downsampled images the signal power in the phase correlation is not concentrated in a single peak, but rather in several coherent peaks mostly adjacent to each other. These coherent peaks correspond to the polyphase transform of a filtered unit impulse centered at the poin...
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This method is an extension of the phase correlation method for image registration to multi-dimensional data sets. Through use of a high-order singular value decomposition, phase correlation can be used to identify translational displacements independently along each dimension with subpixel resolution. The validity of this approach is demonstrated using multiple 3D MRI data sets.
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ژورنال
عنوان ژورنال: EURASIP Journal on Advances in Signal Processing
سال: 2006
ISSN: 1687-6180
DOI: 10.1155/asp/2006/60796