.m
function [output]=gorsel(i,artis)
input=imread(i);
% figure,imshow(input);
j=imnoise(input,'salt & pepper',0.02);
k=medfilt2(j);
filename = ['C:\MATLAB\R2017a\bin\Median' num2str(artis,'%d') '.jpg'];
imwrite(k,filename);
% do something with img
i=imread(filename);
level=graythresh(i);
bw=imbinarize(i,level);
filename2= ['C:\MATLAB\R2017a\bin\Otsu' num2str(artis,'%d') '.jpg'];
imwrite(bw,filename2);
output=bw;
end