convert_masks.m

clc;
clear;

%%  ****************** Convert Mask ******************
%{
Date: 10/14/2020, MATLAB R2020a
This program is written by Alireza Shamsoshoara. The purpose of this 
program is to read labels from the export masks of the Matlab Image
Labeler from the Image processing toolbox and convert them into binarize
version (Blackhot --> WhiteHot) and save them as PNG in another directory.
%}

mask_dir = 'PixelLabelData';
mask_files = dir(fullfile(mask_dir, '*.png'));
Destination_dir = 'ConvertedLabelData';
if ~exist(Destination_dir, 'dir')
       mkdir(Destination_dir)
end

for idx = 1:length(mask_files)
    load_FileName = mask_files(idx).name;
    image = imread(strcat(strcat(mask_dir,'\'), load_FileName));
    BW = imbinarize(image);
    imwrite(BW, strcat(strcat(strcat(Destination_dir,'\'), 'conv_'), ...
        load_FileName));
    fprintf(strcat('conv_', load_FileName + "\n"));
end