Difference of Gaussians
Published 1 January 1984
Alan Bundy, Lincoln Wallen
Citations15
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Abstract
This function is composed of the difference of two gaussian distributions and approximates del-squared-G (the laplacian of a gaussian), the operator which Marr and Hildreth proposed to be optimal for edge detection in images. It also describes the 'mexican hat' weighting function of the receptive fields of retinal ganglion and LGN cells. See also laplacian , spatial operator.
Keywords
Mathematics
Proceedings of the Royal Society of London. Series B, Biological sciencesTheory of edge detection
6,193 Citations1980David Marr, Ellen C. Hildreth
The theory of edge detection explains several basic psychophysical findings, and the operation of forming oriented zero-crossing segments from the output of centre-surround ∇2G filters acting on the image forms the basis for a physiological model of simple cells.