Re: geometric challenge :)

Posted by Gabriel Landini on
URL: http://imagej.273.s1.nabble.com/Macro-code-to-fit-a-spline-to-two-segments-tp5009069p5009399.html

Just as a follow up in case there is further interest.
These papers discuss the issues encountered when computing lengths and
perimeters in discrete blobs:

Kulpa, Z. Area and perimeter measurement of blobs indiscrete binary pictures.
Computer Graphics and Image processing 6:434-451, 1977.

Ellis & Proffitt . Measurement of the lengths of digitised curved line
Computer Graphics and Image processing 10:333-347, 1979.

Kulpa Z. More about areas and perimeters of quantized objects.
Computer Vision, Graphics, and Image Processing, Volume 22, Issue 2, May 1983,
Pages 268-276

Yang et al. Methods to estimate areas and perimeters of blob-like objects: a
comparison. In Proc. IAPR Workshop on Machine Vision Applications, pp.272276
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.143.4018

Cheers

Gabriel

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