clear
clc

I = imread('Lena256color.jpg');
Ired = I(:,:,1);
Igreen = I(:,:,2);
Iblue = I(:,:,3);
I2 = uint8(zeros(260,260,3));
I2(1:256,1:256,1) = Ired;
I2(1:256,5:260,2) = Igreen;
I2(5:260,1:256,3) = Iblue;

Ix = 0.3*I2(:,:,1);
Iy = 0.59*I2(:,:,2);
Iz = 0.11*I2(:,:,3);
Igrayscale = Ix + Iy + Iz;

subplot(1,3,1), imshow(I,[0 255]), title('Original')
subplot(1,3,2), imshow(I2,[0 255]), title('Slightly shifted')
subplot(1,3,3), imshow(Igrayscale,[0 255]), title('Grayscale')