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Difference of Gaussians

Categories: Pattern Recognition and Image Processing

Author(s): T.P. Pridmore, S.R. Pollard, S.T. Stenton

This function is composed of the difference of two Gaussian distributions and approximates 2G (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.



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