That would be a good first step. But you can also get more advanced like slides, or like imagemagick
http://thenewcode.com/819/A-Before-And-After-Image-Comparison-Slide-Control-in-HTML5
http://stackoverflow.com/questions/5132749/diff-an-image-using-imagemagick
Customer support service by UserEcho
That would be a good first step. But you can also get more advanced like slides, or like imagemagick
http://thenewcode.com/819/A-Before-And-After-Image-Comparison-Slide-Control-in-HTML5
http://stackoverflow.com/questions/5132749/diff-an-image-using-imagemagick