input_image = rgb2gray(imread("cotillard.jpg"));

imageWidth = size(input_image) (1)
imageLenght = size(input_image) (2)

e = [];
image = [];
image_buf =[];
e(1) = input_image(1)(1)
counter = 1;
eta = 25;

%%%%% KODOWANIE %%%%%%%%

for i = 1 : imageWidth
  for j = 1 : imageLenght
    image(counter) = input_image(i,j);
    counter++;
    endfor
endfor

image_buf(1) = image(1);

for x = 2 : size(image)(2)

  e(x) = image(x) - image_buf(x-1);

  if e(x) >= 0
    e(x) = eta;
  else
    e(x) = -eta;
  endif

  image_buf(x) = image_buf(x-1) + e(x);

endfor

%%%%%% DEKODOWANIE %%%%%%%


out_image = uint8([]);
counter = 1;

for i = 1 : imageWidth
  for j = 1 : imageLenght
    out_image_e1(i,j) = uint8(image_buf(counter));
    counter++;
    endfor
endfor



figure
subplot(1,2,1)
imshow(input_image)
subplot(1,2,2)
imshow(out_image)