DL-Art-School/codes/data_scripts/generate_mod_LR_bic.m

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Mathematica
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2019-08-23 13:42:47 +00:00
function generate_mod_LR_bic()
%% matlab code to genetate mod images, bicubic-downsampled LR, bicubic_upsampled images.
%% set parameters
% comment the unnecessary line
input_folder = '../../datasets/DIV2K/DIV2K800';
% save_mod_folder = '';
save_LR_folder = '../../datasets/DIV2K/DIV2K800_bicLRx4';
% save_bic_folder = '';
up_scale = 4;
mod_scale = 4;
if exist('save_mod_folder', 'var')
if exist(save_mod_folder, 'dir')
disp(['It will cover ', save_mod_folder]);
else
mkdir(save_mod_folder);
end
end
if exist('save_LR_folder', 'var')
if exist(save_LR_folder, 'dir')
disp(['It will cover ', save_LR_folder]);
else
mkdir(save_LR_folder);
end
end
if exist('save_bic_folder', 'var')
if exist(save_bic_folder, 'dir')
disp(['It will cover ', save_bic_folder]);
else
mkdir(save_bic_folder);
end
end
idx = 0;
filepaths = dir(fullfile(input_folder,'*.*'));
for i = 1 : length(filepaths)
[paths,imname,ext] = fileparts(filepaths(i).name);
if isempty(imname)
disp('Ignore . folder.');
elseif strcmp(imname, '.')
disp('Ignore .. folder.');
else
idx = idx + 1;
str_rlt = sprintf('%d\t%s.\n', idx, imname);
fprintf(str_rlt);
% read image
img = imread(fullfile(input_folder, [imname, ext]));
img = im2double(img);
% modcrop
img = modcrop(img, mod_scale);
if exist('save_mod_folder', 'var')
imwrite(img, fullfile(save_mod_folder, [imname, '.png']));
end
% LR
im_LR = imresize(img, 1/up_scale, 'bicubic');
if exist('save_LR_folder', 'var')
imwrite(im_LR, fullfile(save_LR_folder, [imname, '.png']));
end
% Bicubic
if exist('save_bic_folder', 'var')
im_B = imresize(im_LR, up_scale, 'bicubic');
imwrite(im_B, fullfile(save_bic_folder, [imname, '.png']));
end
end
end
end
%% modcrop
function img = modcrop(img, modulo)
if size(img,3) == 1
sz = size(img);
sz = sz - mod(sz, modulo);
img = img(1:sz(1), 1:sz(2));
else
tmpsz = size(img);
sz = tmpsz(1:2);
sz = sz - mod(sz, modulo);
img = img(1:sz(1), 1:sz(2),:);
end
end