DocumentCode :
2383575
Title :
A non Cartesian FFT approach to image alignment
Author :
Keller, Y. ; Shkolnisky, Y. ; Averbuch, A.
Author_Institution :
Dept. of Math, Yale Univ., New Haven, CT, USA
Volume :
3
fYear :
2005
fDate :
11-14 Sept. 2005
Firstpage :
50
Lastpage :
53
Abstract :
The estimation of large motions without prior knowledge is an important problem in image registration. In this paper we present the angular difference function (ADF) and demonstrate its applicability to rotation estimation. The ADF of two functions is defined as the integral of their spectral difference along the radial direction. It is efficiently computed using the pseudo-polar Fourier transform, which computes the discrete Fourier transform of an image on a near spherical grid. Unlike other Fourier based registration schemes, the suggested approach does not require any interpolation. Thus, it is more accurate and significantly faster.
Keywords :
fast Fourier transforms; image registration; angular difference function; discrete Fourier transform; image alignment; motion estimation; nonCartesian FFT approach; pseudo-polar Fourier transform; rotation estimation; Interpolation;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Image Processing, 2005. ICIP 2005. IEEE International Conference on
Print_ISBN :
0-7803-9134-9
Type :
conf
DOI :
10.1109/ICIP.2005.1530575
Filename :
1530575
Link To Document :
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