Re: Fiducial marker code
- From: "Rival" <aleks.ontman@xxxxxxxxx>
- Date: 24 Oct 2006 00:34:42 -0700
Have you considered using Hough Transform?
Aleks
David Olsson wrote:
I am working on a system which will allow me to detect square fiducial
markers containing visual codes represented by binary (black or white)
squares evenly distributed on a grid on the marker in photographs
and/or video frames. Currently, I successfully identify candidate
markers and sample their area for the marker codes. I however have not
been to come up with any successful coding scheme. The problem I have
had with coding schemes I have tested is that codes may be confused
with other codes if they are rotated or mirrored or that the frequency
of false positives gets very high.
Currently I am using a 6x6 grid and thus have 36 bits to work with. I
have been trying ot come up with schemes using 6-bit CRC checksum to
avoid false positives and rotation/mirror invariant codes but with no
luck.
I would be very grateful if someone could point me in the right
direction!
Best regards
David Olsson
.
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