%dip_canny    Canny edge detector.
%    out = dip_canny(in, sigma, lower, upper)
%
%   in
%      Input image.
%   sigma
%      Sigma of Gaussian used for gradients
%   lower
%      Lower threshold (as a fraction of computed upper threshold)
%   upper
%      Upper threshold (as a fraction of total number of pixels)

% (C) Copyright 2010, Cris Luengo.
