clc



clear all



i=imread( Winter.jpg )

i=rgb2gray(i)





figure(1)

imshow(i)





imwrite(i, Copy.jpg )





j=imread( Sunset.jpg )

j=rgb2gray(j)

jRect=j(100:200,100:200,:)

figure(2)

imshow(jRect)





for x= 100:200

for y= 100:200

i(x,y,:)=j(x,y,:)

end

end

figure(3)

imshow(i) -

clc



clear all



i=imread( Winter.jpg )

i=rgb2gray(i)





figure(1)

imshow(i)





imwrite(i, Copy.jpg )





j=imread( Sunset.jpg )

j=rgb2gray(j)

jRect=j(100:200,100:200,:)

figure(2)

imshow(jRect)





for x= 100:200

　　for y= 100:200

　　　　i(x,y,:)=j(x,y,:)

　　end

end

figure(3)

imshow(i)