Yes you should since it is a edited version. Any piece of art or movie anything being reedited should by definition be copyrighted. But don't go out of the way. But if you want the image to be protected by the U.S. Copyright and fed protected. You should do it. But only images that have intrinsic value really need to be copyrighted. If there is some value for images or usage in the future or present than Yes you should. I taught the Smithsonian a very valuable lesson. Hope this helps Jamie