/
gaussianMask.m
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/
gaussianMask.m
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function [ M ] = gaussianMask( m, n )
%GAUSSIANMASK Generate a gaussian mask matrix with the specified size.
% This mask is used to de-emphasize features at the borders of an image,
% the idea being to concentrate on the features in the center of a
% person's face.
% Copyright (C) 2012 Kaelin Colclasure
% This program is free software: you can redistribute it and/or modify
% it under the terms of the GNU General Public License as published by
% the Free Software Foundation, either version 3 of the License, or
% (at your option) any later version.
%
% This program is distributed in the hope that it will be useful,
% but WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
% GNU General Public License for more details.
%
% You should have received a copy of the GNU General Public License
% along with this program. If not, see <http://www.gnu.org/licenses/>.
halfm = floor(m / 2);
halfn = floor(n / 2);
x = -(halfn - 1):halfn;
y = -(halfm - 1):halfm;
x = x .* (2 / halfn);
y = y .* (2 / halfm);
[X, Y] = meshgrid(x, y);
M = mvnpdf([X(:) Y(:)]);
M = single(M);
M = M / max(M);
M = reshape(M, length(y), length(x));
end