%zoom in / zoom out an image
%scaleX = 2;
%scaleY = 0.5;
%
%new = uint8(zeros(r * scaleX, c * scaleY));

%for x = 1:r
% for y = 1:c
%    new(ceil(scaleX * x), ceil(scaleY * y)) = i (x, y);
%  end
%end
%i = new


%negation transform
%for x = 1 : r
%  for y = 1 : c
%    i(x, y) = 255 - i(x, y);
%  end
%end

%gamma transform
%gamma = 0.8
%a = 1
%for x = 1:r
%  for y = 1:c
%    i(x, y) = ceil (a * i(x, y) ^ gamma);
%  end
% end

%log transform
%gamma = 1
%for x = 1  : r
%  for y = 1 : c
%    i(x, y) =  ceil(gamma * log( i(x, y) + 1));
%  end
%end