Re: curvature along the outline of a thresholded object

Posted by Herbie on Jul 07, 2020; 8:53pm
URL: http://imagej.273.s1.nabble.com/curvature-along-the-outline-of-a-thresholded-object-tp5023589p5023638.html

Kenneth,

your remark is to the point and was also made by Michael Schmid offlist.

The problem is, that the spline is applied to a selection by a macro and
therefore I see no easy way to avoid it. What I did and what allows me
to reduce the glitch, is to also compute local curvatures from the same
but rotated contour (180deg). From both results I can detect the
problematic values and try to compensate them...

Thanks for chiming in

Herbie

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Am 07.07.20 um 22:30 schrieb Kenneth Sloan:

> This may be irrelevant and ignorant, but I'll ask anyway: is the "interpolation" being done over  a cyclic  domain?  If not, that would explain a glitch at the transition from end to start of the contour.
>
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> Kenneth Sloan
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> Vision is the art of seeing what is invisible to others.
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