isobel.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

%ISOBEL	Sobel edge detector
%
%	is = ISOBEL(image)
%
%	applies the Sobel edge detector, which is the norm of the vertical
%	and horizontal gradients.  Tends to produce rather thick edges.
%
%	Copyright (c) Peter Corke, 1999  Machine Vision Toolbox for Matlab

function is = isobel(i)
	sh = [-1 0 1;-2 0 2;-1 0 1];
	sv = [1 2 1; 0 0 0; -1 -2 -1];
	ih = conv2(i, sh);
	iv = conv2(i, sv);
	is = sqrt(ih.^2 + iv.^2);