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Store data on paper with Twibright OptarStore data on paper with Twibright OptarPosted Jul 26, 2007 22:51 UTC (Thu) by elicriffield (subscriber, #33738)In reply to: Store data on paper with Twibright Optar by eli Parent article: Store data on paper with Twibright Optar
Hey i thought i was eli.....
I don't know about the color requirements but seems like you could make pictures that don't look to abnormal, maybe more like a painting that would have 100k of data in them.
It'd be a neat trick for an album cover.
Eli Criffield
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Store data on paper with Twibright Optar Posted Jul 26, 2007 23:24 UTC (Thu) by eli (subscriber, #11265) [Link] Hey i thought i was eli..... Heh, so did I. ;) Eli Carter
Store data on paper with Twibright Optar Posted Jul 29, 2007 9:07 UTC (Sun) by man_ls (subscriber, #15091) [Link] Heh! You could even encode an image in an otherwise normal album cover, and in the encoded image (e.g. a PNG) you could also encode another image. Ad nauseam...I don't think you could create an auto-encoding image: one which when decoded yields the same image, but it's an interesting problem to be sure.
Store data on paper with Twibright Optar Posted Aug 4, 2007 13:29 UTC (Sat) by pimlottc (subscriber, #44833) [Link] PARC has a (non-free) 2D barcode system called Dataglyphs, composed of patterns of simple fore- and back-slashes, which can be used as halftone dots, changing their thickness, lengths and colors as needed to render an image. It's very nice and unobtrusive, especially at high resolution. There's a bunch of example images on their webpage and even an interactive demo page where you can encode and decode your own test images. The density is not as good - 1 KB/inch^2 @ 600 dpi (comes to 96KB for an A4 page) - but the simplicity of the patterns makes it fade easily into the background and allows for a good amount of alteration for aesthetic purposes which still being machine-recognizable.
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