TY - GEN
T1 - A non cartesian FFT approach to image alignment
AU - Keller, Y.
AU - Shkolnisky, Y.
AU - Averbuch, A.
PY - 2005
Y1 - 2005
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=33749245870&partnerID=8YFLogxK
U2 - 10.1109/ICIP.2005.1530575
DO - 10.1109/ICIP.2005.1530575
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AN - SCOPUS:33749245870
SN - 0780391349
SN - 9780780391345
T3 - Proceedings - International Conference on Image Processing, ICIP
SP - 50
EP - 53
BT - IEEE International Conference on Image Processing 2005, ICIP 2005
PB - IEEE Computer Society
T2 - IEEE International Conference on Image Processing 2005, ICIP 2005
Y2 - 11 September 2005 through 14 September 2005
ER -