document.write('
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  1. r=imread(\'z.jpg\');
  2. r=rgb2gray(r);
  3. q=r;
  4. a=bitget(r,8);
  5. b=bitget(r,7);
  6. c=bitget(r,6);
  7.  
  8. figure(1);
  9. subplot(4,4,[2 3 6 7]),imshow(r),title(\'original\');
  10. subplot(4,4,[9 10]),imshow(logical(a)),title(\'bitplane 8\');
  11. subplot(4,4,[11 12]),imshow(logical(b)),title(\'bit plane 7\');
  12. subplot(4,4,[13 14]),imshow(logical(c)),title(\'bitplane 6\');
  13.  
  14.  
  15. x=bitset(a,8,a);
  16. y=bitset(x,7,b);
  17. z=bitset(y,6,c);
  18.  
  19. subplot(4,4,[15 16]),imshow(z),title(\'reconstructed\');
');