Hi, I don't suppose this has been posted, but I've stumbled upon a website that works like anicro desapro did. You can upload a picture from your computer or just use an URL, specify the dimensions of what kind of pattern you want (dress, normal, pro pattern etc) and the maximum amount of colours you would like to use (max 15), and it will turn it into a pattern and point out which palette colours are to be used. Give it a try!
http://app.nicofinder.net/tobimy
http://app.nicofinder.net/tobimy