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A robust cepstrum-based algorithm for image registration using projections

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1 Author(s)
Sarnel, H. ; Electr. & Electron. Eng. Dept., Dokuz Eylul Univ., Izmir, Turkey

The 2D phase correlation and the 2D cepstrum technique are known as two solutions to the translation-based image registration problem. However, both methods have a large computational load. Satisfactory results were obtained in a smaller translation range by applying phase correlations to the 1D projections of images to reduce the computational load (Alliney, S. and Morandi, C., 1986). The paper presents a new algorithm based on applying the cepstrum technique to image projections in a similar way. An enhanced cepstrum technique is developed by subtracting the cepstrum of the projection differences from the cepstrum of the projection additions. A superior performance compared to that of the 1D phase correlation can be obtained by whitening the power spectrum by the square-root instead of the logarithm and using a high-pass filter afterwards. The algorithm yields larger translation ranges in registering noisy images and remarkably outperforms the phase correlation method in the case of different degrees of blurring between images.

Published in:

Signal Processing, 2002 6th International Conference on  (Volume:1 )

Date of Conference:

26-30 Aug. 2002

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