enhance the color of a scanned image

i've scanned an image http://imageshack.us/f/805/page3q.png/

and i want to enhance the color just like this example image http://imageshack.us/f/843/97895457.jpg/

then i use this code

i = imread ('d:\wildlife\page-3.png'); 
x=imadjust (i,[],[],0.5);
figure, imshow(x);SE = strel ('square', 3);
j=imerode (x, SE);
figure,imshow(j);

and the result is still unoptimal, and the size become smaller http://imageshack.us/f/24/untitp.jpg/

is there any other way to enhance color of this image?