%DEL2 Discrete Laplacian.
%   L = DEL2(U)
%   L = DEL2(U,H)
%   L = DEL2(U,HX,HY)
%   L = DEL2(U,HX,HY,HZ,...)
%   
%   Example:
%    
%       IM = gpuArray(imread('street2.jpg')); % Load image
%       IM = mean(IM,3);     % Convert to grayscale
%       L = del2(IM);        % Find interest points
%       imagesc(L > 8);      % Show as image
%   
%   See also DEL2, GPUARRAY, GPUARRAY/GRADIENT, GPUARRAY/DIFF.
%   


%   Copyright 2013 The MathWorks, Inc.
