[Octave-bug-tracker] [bug #52933] [octave-forge] (image) regionprops Perimeter returns Matlab incompatible results

[Avinoam Kalma]

Follow-up Comment #3, bug #52933 (project octave):

>From http://www.crisluengo.net/index.php/archives/310:

"Proffitt and Rosen also introduced the concept of corner count, the number of
times the chain code changes value. As we will see later, this can further
reduce the orientation dependency of the method. Vossepoel and Smeulders
(Computer Graphics and Image Processing 20(4):347-364, 1982) obtained the
following optimal values using the even, odd and corner counts:"


corner = cc.chain~=[cc.chain(end),cc.chain(1:end-1)];
p = sum(even)*0.980 + sum(~even)*1.406 - sum(corner)*0.091;


See also table 3 in Vossepoel and Smeulders paper in
https://pure.uva.nl/ws/files/2080198/30019_135305.pdf

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