Hi Hildur, you can try to use the function pcAlign (from my R-package Morpho), to align meshes by their PC-axes. And, if you like my (inofficial) package mesheR (https://github.com/zarquon42b/mesheR) is sporting a variety of rigid, similarity, affine and elastic ICP registration procedures for 3D-meshes.
Best Stefan On 04/02/15 14:22, Hildur Magnúsdóttir wrote: > Hi everyone, > > I'm using geometric morphometrics to study variation in the shell > morphology of the common whelk. I'm really interested in using 3D > images as a basis for this study but I'm having problems with > manipulation and registration (e.g. rigid registration) of my images > prior to digitizing of landmarks. > > I'm using a MakerBot® Digitizer™ Desktop 3D Scanner for capturing the > 3D images and it generates either .stl or .ply files that I read into > the R for digitizing. My problem is that when I read those files into > the R they are not all oriented in the same way inside the box in the > rgl window, thus it is very hard to align them reliably so that the > landmarks are truly comparable between individuals. > > So my question to you all is if you know of a method to align or > register the 3D images before I read them into R? Or of a package in R > that can perform this action? > > I would be very grateful for any advice on this, > > Hildur > > > Hildur Magnúsdóttir > PhD Student > University of Iceland, Department of Life and Environmental Sciences > and Hólar University College, Department of Aquaculture and Fish Biology > Telephone: +354 823 2485 > -- > MORPHMET may be accessed via its webpage at http://www.morphometrics.org > To unsubscribe from this group and stop receiving emails from it, send > an email to [email protected] > <mailto:[email protected]>. -- MORPHMET may be accessed via its webpage at http://www.morphometrics.org To unsubscribe from this group and stop receiving emails from it, send an email to [email protected].
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