r=imread('z.jpg');
r=rgb2gray(r);
q=r;
a=bitget(r,8);
b=bitget(r,7);
c=bitget(r,6);

figure(1);
subplot(4,4,[2 3 6 7]),imshow(r),title('original');
subplot(4,4,[9 10]),imshow(logical(a)),title('bitplane 8');
subplot(4,4,[11 12]),imshow(logical(b)),title('bit plane 7');
subplot(4,4,[13 14]),imshow(logical(c)),title('bitplane 6');


x=bitset(a,8,a);
y=bitset(x,7,b);
z=bitset(y,6,c);

subplot(4,4,[15 16]),imshow(z),title('reconstructed');