clc
clear
I=imread('snowflakes.png');
I2=imread('rice.png');
I3=imread('football.jpg');

subplot(4,1,1);
imshow(I);
subplot(4,1,2);
imshow(I2);
subplot(4,1,3);
imshow(I3);

for i=20:100
    for j=50:100
        I2(i,j) = 120;
    end

end
subplot(4,1,4);
imshow(I2);

figure;
subplot(3,2,1);
imshow(I2);
subplot(3,2,2);
imshow(I2,[190,200]);

I4=imread('tire.tif');
for i=40:150
    for j=40:150
        I4(i,j) = 75;
    end

end


imfinfo('rice.png')
imwrite(I4,'tire33.png','quality',5);
I42=imread('tire33.png');
subplot(3,2,3);
imshow(I42);