I stumbled across this site this morning and thought it might be of interest:

Digimarc (http://www.digimarc.com/default.asp)

I don't know anything about it except what is available on the site.

Margaret

Thanks for the link Margaret.

I looked into digital watermarks during the discussion we had on how to protect images (http://www.retouchpro.com/forums/showthread.php?s=&threadid=4543). I was disappointed to discover that if a filter (just about any filter) is run on a digitally watermarked image, it essentially disables the watermark. Cropping a little bit keeps it, cropping a lot disables it.

Bottom line, the digital watermark helps you track in image that is copied as is. But, if someone wants to make "photo-art" from it and claim it as their own, it is pretty much impossible to track that. :(

Jeanie

An interesting side note on security graphics can be found here (from the famous Xerox/PARC research centre):

http://www.parc.com/solutions/dataglyphs/

Regards,

Stephen Marsh.