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Research Letters in Signal Processing
Volume 2008 (2008), Article ID 417915, 5 pages
Research Letter

Estimation of Subpixel Motion Using Bispectrum

1Faculté des Sciences de Rabat, Université Mohammed V Agdal, 4 Avenue Ibn Battouta, B.P. 1014 RP, Rabat, Morocco
2Institut National des Postes et Télécommunication, Madinat Al Irfane, Rabat, Morocco

Received 19 September 2007; Accepted 1 February 2008

Academic Editor: Liang-Gee Chen

Copyright © 2008 El Mehdi Ismaili Aalaoui and Elhassane Ibn-Elhaj. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Motion estimation techniques are widely used in today's video processing systems. The frequently used techniques are frequency-domain motion estimation methods, most notably phase correlation (PC). If the image frames are corrupted by Gaussian noises, then cross-correlation and related techniques do not work well. In this paper, however, we have studied this topic from a viewpoint different from the above. Our scheme is based on the bispectrum method for sub-pixel motion estimation of noisy image sequences. Experimental results show that our proposed method performs significantly better than PC technique.