Product Image crop feature

[giacid]

Hi,

I would like to know if there is a plugin or any other way to have your image product croped according to the clients needs. For example for a product such as a wallpaper, a visitor should be able to crop the product image to the exact area that he wants for his wallpaper.
Something like this site

http://www.houseart.gr/details.php?id=80&pid=10961

The visitor chooses the exact pattern and then only this pattern is stored for the cart.

Any ideas?

Thank you in advance.!