An extended 1-D phase correlation algorithm for image registration
IEEE-EURASIP Workshop on Nonlinear Signal and Image Prcessing (NSIP 99), Antalya, Turkey, 20 - 23 June 1999, pp.219-223, (Full Text)
- Publication Type: Conference Paper / Full Text
- Volume:
- City: Antalya
- Country: Turkey
- Page Numbers: pp.219-223
- Dokuz Eylül University Affiliated: No
Abstract
The I-D phase correlation algorithm proposed by Alliney for translational image registration is extended by including phase correlations of the two diagonal projections of images to gain robustness against the wide-band noise. The best M points from the phase correlation functions of the vertical and horizontal projections are selected composing M x 11 translation candidates. Each candidate translation is assigned a rate on the basis of support given by the best All points from the correlation functions of the diagonal projections. Because of the random distribution of the false translations the true translation only gathers support thus takes the first place after the rating computations. A simple cost function, which favors the true translation in most cases, is offered. Experimental results with M = 12 chosen show that the extended algorithm provides a valuable robustness especially for images of wide-band spectrum. The I-D extended algorithm may also replace the 2-D algorithm when relatively small translations are expected.