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The 'proper' fix is to either engineer cameras that can focus closer, or to engineer barcode scanning apps to be able to see a code which is small somewhere in
by londons_explore 3y ago
The 'proper' fix is to either engineer cameras that can focus closer, or to engineer barcode scanning apps to be able to see a code which is small somewhere in the frame.
I think people are working on both as we speak.
- deleted 3y ago[deleted]
- Retr0id 3y agoIt doesn't matter how objectively good your camera/decoder is, in absolute terms. There will always be some minimum size or maximum distance, where the detail can no longer be resolved (or errors no longer corrected)
- subtra3t 3y agoWhy? Is this something that's a side effect of some irrefutable physics law or a limitation of the current technology?
- Retr0id 3y agoBoth. You can't have a measurable feature smaller than the Planck length, but that's not relevant to QR decoding in any practical sense. As for the practical limits, try using your phone to take a picture of something very far away, or very tiny, and see what happens.
- londons_explore 3y agoIf we're talking theory, the pixel size doesn't matter - it's the amount of information encoded in the QR code that matters (ie. excluding ECC bits!). In turn, that means it is theoretically possible to decode a QR code where each 'pixel' of the code is smaller than the pixel of the camera sensor observing the code. While it is theoretically possible, nobody has yet done so...