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Topic: CAP Code from your Laser Printer

Kyle McEachern
Expert Film Handler

Posts: 165
From: San Francisco, CA
Registered: Feb 2004

posted 11-27-2004 11:41 PM

I believe the statement of it being "Photoshop Assisted" implied that the dots were black (as they appear in the top photo), and the yellow was added by him.

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Adam Wilbert
Jedi Master Film Handler

Posts: 590
From: Bellingham, WA, USA
Registered: Mar 2002

posted 11-27-2004 11:59 PM

The dots are printed with yellow toner. Under the blue LED light, they show up black (or "dark" anyway). I colored a few white so that they would show up easier in the photo. Where there was a block of full color printing (like on the picture of Thomas), I couldn't see any dots, but I wasn't using a magnifier. It also appeared that the dots extended into what is normally a 1/4" unprintable margin space, so even if the entire page was covered in toner (as in reproducing a photograph for instance) some of the code would still be preserved. I'm not totally sure about this last part though and will have to look into it further.

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Thomas Procyk
Phenomenal Film Handler

Posts: 1842
From: Royal Palm Beach, FL, USA
Registered: Feb 2002

posted 11-28-2004 09:19 PM

So basically, it will track the document to the printer (wherever it may be) and not to the person? Copy Protection done wrong! [Wink]

=TMP=

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John Pytlak
Film God

Posts: 9987
From: Rochester, NY 14650-1922
Registered: Jan 2000

posted 11-29-2004 10:28 AM

Kodak is one of the leading providers of digital watermarking technology:

Kodak Watermarking Technology for Digital Cinema

quote:
For movies that are distributed electronically to theaters, a Kodak Digital Cinema projector can continuously embed a small amount of data into the movie when it is shown. Each showing of the movie is given a unique, invisible digital watermark identifying the date, time and theater of that particular showing. So if a camcorder is used to capture that movie, the videotape also records the watermark embedded throughout. As a result, a series of frames from a suspected bootleg copy of a movie can be examined to determine the time and place of theft, which can help with the apprehension of movies pirates.

Kodak recently demonstrated an industry milestone: the extraction of 16-bit digital watermark data from as few as 15 frames.

Kodak Digital Watermarking

Kodak Technical Paper on "Data Embedding"

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Ron Yost
Master Film Handler

Posts: 344
From: Paso Robles, CA
Registered: Aug 2003

posted 11-29-2004 12:19 PM

For what it's worth, I tried the blue led light test on output from my Konica/Minolta Magicolor 2300 DL. Result: No coded 'pattern' visible at all. Nothing. Nada. [Big Grin]

Ron Yost

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Thomas Procyk
Phenomenal Film Handler

Posts: 1842
From: Royal Palm Beach, FL, USA
Registered: Feb 2002

posted 11-30-2004 08:46 AM

Well, what are you waiting for, Ron? Print me up some of those snazzy new $50's! [thumbsup]

=TMP=

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