[R] shapes of woodpeckers' cavities

[ONKELINX, Thierry]

Dear Violette,

Search for elliptical Fourier analysis. RSiteSearch("elliptical fourier analysis")

Best regards,

Thierry

ir. Thierry Onkelinx
Instituut voor natuur- en bosonderzoek / Research Institute for Nature and Forest
team Biometrie & Kwaliteitszorg / team Biometrics & Quality Assurance
Kliniekstraat 25
1070 Anderlecht
Belgium
+ 32 2 525 02 51
+ 32 54 43 61 85
Thierry.Onkelinx at inbo.be
www.inbo.be

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~ Sir Ronald Aylmer Fisher

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-----Oorspronkelijk bericht-----
Van: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] Namens Violette BERTRAND
Verzonden: donderdag 6 maart 2014 22:52
Aan: r-help at r-project.org
Onderwerp: [R] shapes of woodpeckers' cavities

Hi,

I have pictures (.png) of the shape of many entrances of woodpeckers’ cavities, coloured in black. I want that R takes these pictures and stacks (superimposes) all the shapes to determine the tendency of the shape of cavities for each species of woodpecker.

I currently use the package EBImage which determine the mean radius of the shape of entrances (the shape is divided in 8 parts, and the package measure the mean radius for each part). So this package uses only the mean radius for each part of the shape.

But, I would like that R use the real shape of cavities. Is another package exists, which will use the real shape of my pictures ?



Thanks,
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