PTP logos are embedded with [[http://www.launi.com/dc/ptp-logo/digimarc.html|DigiMarc]] digital identification.

-- LonnieWormley 21 Feb 2002

To read a DigiMarc watermark:
 * Mac Photoshop 6 - Choose Filter > Digimarc > Read Watermark.
 * probably similar in other versions, but I can't test  it right now.


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[CategoryGlossary]