Image registration using Fermat transforms
Carlo Morandi, Francesco Piazza, Alberto Dolcetti · Electronics Letters · 1988
Binary boundary maps are obtained by edge detection, then their relative translation is determined by conventional crosscorrelation computed by Fermat transform. Use of boundary maps emphasises edges and sharp discontinuities, while rejecting disturbances related to nonuniform illumination, thus avoiding the costly normalisation step. Use of integer arithmetic allows significant savings in computatio