What IS that?! >_O
Okay. What I consider "stamping" is the visible placement of
some text on an image (copyrights, URLs, etc.). Some people
may consider a semi-transparent logo/text on an image to also
be a watermark, but that's not quite accurate in digital terms.
"Stamping" therefore is the easiest thing to do because you
can do it within many different graphic apps.
Digital watermarking is a whole other story; you need a
standalone app or a plug-in for a larger app (in my case,
Photoshop) to digitally add invisible data to the image - often
an ID of some kind (Digimarc is standard with Photoshop).
Watermarking is a little more serious, but still removeable
(I've tried), so nothing is truly fail-safe short of stamping
text across the entire length of an image and subsequently
ruining it for gallery purposes. >_< I would NOT use watermarking
just for a cel gallery - this is used for creative work,
graphics and images you made yourself (original fanart would
probably fall under this category, but while I watermark mine
I also stamp legitimate copyrights to the company on it).
Anyway, if anyone has specific questions for Photoshop 5.5
or Imageready 2.0 (my choice for web graphic compression),
feel free to e-mail me privately...