Dear Bill, Thanks for your comment. I can now have these considerations for this type of data (as opposed to think that there was some mesh-exporting method I was missing).
Best wishes, Viviana 2016-09-02 14:20 GMT+02:00 Bill Sellers <w...@mac.com>: > This is actually quite a tricky thing to do. Texturing in OBJ files maps > part of an image onto a surface triangle. There are no vertices associated > with the colours. PLY files work differently and each vertex has its own > colour. To recreate the textures in a PLY file you would need to create a > new vertex for each pixel in the OBJ file. That would make the file very > much larger and involve a moderate amount of geometric calculation. I don't > know of any software package that will do this for you (it isn't > particularly hard but I doubt there is much demand). However there are > plenty of software packages that will read textured OBJ files and let you > make measurements of points on faces (Blender can do this for example). The > problem is that the process isn't streamlined to make taking large numbers > of measurements particularly quick and easy. Also I would worry that you > are losing quite a lot of accuracy in this approach because the 3D position > will just be linearly interpolated from the vertices and this may give you > a false sense of the precision of the technique. > > Cheers > Bill > -- > Bill Sellers, Tel: 01612751719, Mobile: 07857655786, > http://www.animalsimulation.org > University of Manchester, D1239 Michael Smith Building, Manchester, M13 > 9PT. > > On 01/09/2016 12:31, M. Viviana Toro Ibacache wrote: > >> Deal Morphometricians, >> >> I have .obj files with textures from three .jpg photos. I can load and >> see the textures very nicely in Meshlab, but I need the textures to be >> transformed into a coloured .ply file to do geometric morphometric analyses >> (the landmarks are represented in the textures). So far it has not worked >> doing it from Meshlab, so my questions are: >> >> - I know I can place landmarks in Meshlab using the .obj file, but when I >> do it, the software crashes. any thoughts? the .obj file is 16 Mb big. Is >> there a limit to files size in Meshlab? I would rather not to downsample >> the mesh to not lose anatomical details. >> >> - When using the Transfer Texture to Vertex Color function, the texture >> gets messed. It seems from web forums that Mshlab takes only one of the (in >> this case) three .jpg files to do the colouring of the .ply mesh. Does >> anybody know how to fix this? Another freeware software? >> >> - Is there any landmark acquisition software that loads .obj files with >> textures? So far, I have not been able to do it in Landmark Editor, Evan >> toolbox, Avizo, Morpho nor Geomorph. >> >> Any help is greatly appreciated. >> >> Best (y saludos), >> Viviana >> >> >> >> -- >> * >> Viviana Toro-Ibacache DDS MSc PhD* >> Profesora Asistente /(Assistant Professor)/ >> Centro de Análisis Cuantitativo en Antropología Dental (CA2) >> Unidad de Anatomía, Instituto de Investigación en Ciencias Odontológicas >> Facultad de Odontología Universidad de Chile >> >> Dirección: Sergio Livingstone Pohlhammer 943 >> /(address)/ Independencia, Región Metropolitana >> Chile >> Email: mtoroibaca...@odontologia.uchile.cl <mailto: >> mtoroibaca...@odontologia.uchile.cl> >> Web: www.researchgate.net/profile/Viviana_Toro_Ibacache/ < >> http://www.researchgate.net/profile/Viviana_Toro_Ibacache/> >> www.cienciaymemoria.cl/staff.html < >> http://www.cienciaymemoria.cl/staff.html> >> >> -- >> MORPHMET may be accessed via its webpage at http://www.morphometrics.org >> --- >> You received this message because you are subscribed to the Google Groups >> "MORPHMET" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to morphmet+unsubscr...@morphometrics.org <mailto: >> morphmet+unsubscr...@morphometrics.org>. >> > > -- > MORPHMET may be accessed via its webpage at http://www.morphometrics.org > --- You received this message because you are subscribed to the Google > Groups "MORPHMET" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to morphmet+unsubscr...@morphometrics.org. > > -- *Viviana Toro-Ibacache DDS MSc PhD* Profesora Asistente *(Assistant Professor)* Centro de Análisis Cuantitativo en Antropología Dental (CA2) Unidad de Anatomía, Instituto de Investigación en Ciencias Odontológicas Facultad de Odontología Universidad de Chile Dirección: Sergio Livingstone Pohlhammer 943 *(address)* Independencia, Región Metropolitana Chile Email: mtoroibaca...@odontologia.uchile.cl Web: www.researchgate.net/profile/Viviana_Toro_Ibacache/ www.cienciaymemoria.cl/staff.html -- MORPHMET may be accessed via its webpage at http://www.morphometrics.org --- You received this message because you are subscribed to the Google Groups "MORPHMET" group. To unsubscribe from this group and stop receiving emails from it, send an email to morphmet+unsubscr...@morphometrics.org.
