function denoising(inputDir, outputDir, thresh)

%Image denoising by Morphology-based Smoothing

%   inputDir: input image directory  

%   outputDir: output image directory

%   thresh: the threshold for binarizing(0~255)

imgDir  = dir([inputDir '*.png']); % 遍历目录内所有png格式文件

for i = 1:length(imgDir)          

    raw = imread([inputDir imgDir(i).name]); %¶ΑΘ΅ΓΏΥΕΝΌΖ¬

    binary = raw; 

    binary(binary>thresh) = 255;

    binary(binary<=thresh) = 0;

    se = strel('disk', 3);

    new = imclose(binary, se);

    new = imopen(new, se);

    new(new>0) = 255;

    imwrite(uint8(new), [outputDir imgDir(i).name]);

end

end