[willus]

Originally Posted by rostamiani

But the watermark conflicts the process !
Can you add an option for removing watermark ?

I did a simple job using Matlab .Just subtracted average of all pages from every page

. This is the original page:
http://www.iranimg.ir/?di=213549606095

And this one is with partly removed watermark :
http://www.iranimg.ir/?di=15135493865414

If the watermark is light enough, you can just set the white threshold level so that it will be ignored (option -wt). Beyond that, I don't anticipate implementing an algorithm to remove the watermark at this time.