[magick-users] remove shadow from picture

[Kyrill]

Hi all,

I'm working on a script that removes the background from pictures.
The problem is on pictures with shadow, it doesn't remove the shadow.

Any idea how I can remove the shadow too?

Here the steps that I use for removing the background:

Original File
http://img179.imageshack.us/img179/255/origke7.jpg

Difference
http://img170.imageshack.us/img170/3316/diffih5.png

Threshold
http://img170.imageshack.us/img170/7930/thresholdhi5.png

Image without background but with shadow
http://img186.imageshack.us/img186/5355/outhb7.png

If you need more information, let me know.

Greetings