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Fast Hartley Transform and overlap sectioning for calculation of linear cross-correlation of images

Wołowiec Ł., Jacymirski M.

Journal of Applied Computer Science

2004

Vol. 12, nr 2

65-75

The paper deals with application of Fast Hartley Transform to calculation of linear cross-correlation of images. A sectioning algorithm for the two-dimensional case, based on a known convolution-sectioning algorithm, is proposed and described in the paper. Moreover, the correlation algorithms based on the Fourier and Hartley Transforms have been studied, and the comparative examination of the practical performance of these algorithms displays the superiority of the Hartley Transform over the Fourier one for the real-data input.