Wednesday, October 19, 2005

color lasers watermark pages

I was reading some news articles about how some color laser printers actually watermark the pages they print with information. some CIA conspiracy for anti money making or something. this guy modded his scanner with a whole bus of blue LEDS so his scanner could see the watermarks. pretty cool!

3 comments:

palegreenhorse said...

nice scanner mod! i love that use of blue leds. the watermarking by printers is pretty interesting. wouldn't have guess that.

palegreenhorse said...
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Dan said...

so um what did jen say that got deleted? I am fasinated by the concept of the water marks. do they appear frequently throughout the page or just one per a page. These would be easy for an intelligent teller or even vending machine to pick out with the right "say a 450nm" light source.