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% Copyright (c) Philipp Wagner. All rights reserved.
% Licensed under the BSD license. See LICENSE file in the project root for full license information.
function gallery(path, filename, _rows, _cols)
%% Create a gallery from a given image directory.
%%
%% Args:
%% path: Folder to create images from
%% filename: filename for the created gallery
%% _rows,_cols: rows and columns of the gallery
%%
%% Example:
%% gallery("/home/philipp/facerec/data/yalefaces_recognition/s03","yale_s01.png",2,6);
%%
images = list_files(path);
[_height, _width,_channels] = size(imread([path,filesep,images{1}]));
if(nargin < 4)
_rows = _cols = ceil(sqrt(length(images)));
if(length(images) <= ((_rows-1)*_cols))
_rows = _rows-1;
end
end
g = zeros(_rows * _height,_cols * _width, _channels);
c=1;
for i=1:_rows
_row = zeros(_height, _cols*_width,_channels);
for j=1:_cols
if(c <= length(images))
% construct the row as long as we got images to read
_row(:, ((j-1)*_width+1):(j*_width),:) = imread([path,filesep,images{c}]);
c=c+1;
end
end
% assign row
g(((i-1)*_height+1):(i*_height),:,:) = _row;
end
imwrite(uint8(g) , filename);
end