And there's digital watermarking via steganography. "As a simple example, a sender might start with an innocuous image file and adjust the color of every 100th pixel to correspond to a letter in the alphabet, a change so subtle that someone not specifically looking for it is unlikely to notice it."
http://en.wikipedia.org/wiki/Steganography ~Roger On Apr 13, 2013 2:53 PM, "Richmond" <richmondmathew...@gmail.com> wrote: > On 04/13/2013 09:29 PM, stephen barncard wrote: > >> Photoshop has a plugin and a paid service to apply invisible watermarks to >> images. They've had this for over 20 years. >> As most serious photographers have photoshop, I would assume it's been >> used >> a lot over the years, even pre-internet. >> > > http://graphicssoft.about.com/**od/gimptutorials/ss/graphic-** > watermark.htm<http://graphicssoft.about.com/od/gimptutorials/ss/graphic-watermark.htm> > > Richmond. > > > ______________________________**_________________ > use-livecode mailing list > use-livecode@lists.runrev.com > Please visit this url to subscribe, unsubscribe and manage your > subscription preferences: > http://lists.runrev.com/**mailman/listinfo/use-livecode<http://lists.runrev.com/mailman/listinfo/use-livecode> > _______________________________________________ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
