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> My favorite is the ones that triple the information density by simply printing a different QR code in the red, green, and blue channel (all on top of each oth
by marcodiego 4y ago
> My favorite is the ones that triple the information density by simply printing a different QR code in the red, green, and blue channel (all on top of each other obviously).
Microsoft did something like that: https://www.microsoft.com/en-us/research/project/high-capacity-color-barcodes-hccb/ https://www.microsoft.com/en-us/research/project/high-capaci...
- zxcvbn4038 4y agoMy first thoughts are that colors tend to change and degrade over time, and when wet color inks tend to bleed more easily than black ones, I don't see something like this being used in an industrial setting. It seems more like a novelty.
- IIAOPSW 4y agoYeah but we are talking about just 1 bit per color channel (8 colors, 1 for every on/off combination of RGB). I buy that colors bleed and fade, but surely they don't fade to the point where an entire channel disappears.
- bradknowles 4y agoYellow will definitely fade to something that is much less perceptible. Since it's a primary color in the CMYK space, this is an issue with any kind of multi-color process printing.