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A comment on Ask HN: What under-the-radar technology are you excited about?. Parent comment

Re:Ask HN: What under-the-radar technology are you excited a... by pmarreck on Monday April 12, 2021 @06:16PM (#26785858)
Yes, I too thought this, how does a QR code not already accomplish this need?
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Re:Ask HN: What under-the-radar technology are you excited a... by Robotbeat on Monday April 12, 2021 @06:22PM (#26785915)
A QR code IS a type of fiducial.

There’s an entire spectrum of fiducial types based on 2D bar code matrices. QR code is the most well known.

But 2D matrices are not as resistant to motion blur, so there are advantages to some of the other types.

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