Hi everyone,

Ok so I think this was a common problem to many people, as they were trying to save a plot on image with its native resolution. I found out a solution to this, it's working fine for me. I'll post it so that you can use it if you need it. Here it is:

I = imread('data0012.tif');      % Load a sample image 
imshow(I);                      % Display it 
[r,c,d] = size(I);              % Get the image size 
set(gca,'Units','normalized','Position',[0 0 1 1]);  % Modify axes size 
set(gcf,'Units','pixels','Position',[200 200 c r]);  % Modify figure size 
hold on; 
plot(Z{12}(1,:),Z{12}(2,:),'rx',hat_X{12}(1,:),hat_X{12}(3,:),'co');   % Plot something over the image 
f = getframe(gcf);                % Capture the current window 
imwrite(f.cdata,'data12.tif');   % Save the frame data 

       Enjoy 
 
       Jimmy