ilog.m

来自澳大利亚Qeensland大学的计算机视觉Matlab工具箱。 This Toolbox provides a number of functions that are useful in co

%ILOG	Laplacian of Gaussian kernel
%
%	L = ilog(w, sigma)
%
%	Return a Laplacian of Gaussian (LOG) kernel of width (2w+1) with
%	the specified sigma.
%
% SEE ALSO:	zcross
%
%	Copyright (c) Peter Corke, 1999  Machine Vision Toolbox for Matlab

% Peter Corke 1996

function il = ilog(w, sigma)
	[x,y] = meshgrid(-w:w, -w:w);
	il = -1/(2*pi*sigma^4) * (2 - (x.^2 + y.^2)/sigma^2) .*  ...
		exp(-(x.^2+y.^2)/(2*sigma^2));