Dear Colleagues, I really appreciate your help with this. Indeed, there is a bit of everything you mentioned in both the problem and the solution. I will try to summarise it in case it can help someone else:
- File names: Indeed I had problems in the past with .obj files whose names had spaces, as Thomas mentioned. This was not the case though (I learned my lesson), but it could happen to someone else. - Lack of software to do this in a very reliable way: as Bill mentioned, there might be issues with accuracy by transforming an .obj with texture to a coloured .ply. I will explore the use of Blender directly in .obj files for landmark placing. I am not too worried about my data as the landmark configuration corresponds to human faces (the texture will guide me in placing landmarks in some curved places), where in my experience geometry dimensions exceed small inaccuracies. But it is definitely something to bear in mind. Of course, I shall run tests to assess the effect of measurement error on my data. - The .obj texture files: a big problem seemed to be that the original data had three .jpg files depicting texture. As Pablo mentioned, the "standard" texture should be one file. So... - ... Geomagic comes to rescue (maybe Blender does this too?): Anneke suggested to use Geomagic, which indeed helps a lot. Antonio took my files and helped me to generate in Geomagic the single-.png-file texture, which can then be used to produce coloured .ply and .wrl files in Meshlab that can be opened in Avizo (.wrl, for which an extra step in Geomagic is needed), and in the R packages Geomorph and Morpho for landmark placing. About Joes's comment, I do not believe .stl can hold colours, but I do not have too much experience with the .stl format. The .obj format (as well as .ply) has a relatively simple structure that describes the position in space of faces and vertices plus other stuff and can be created "by hand" using a text editor such as Notepad (I am sure you might have checked this but just in case https://en.wikipedia.org/wiki/Wavefront_.obj_file). I have written .ply files in the past that worked very well for doing morphometric analyses in R. So, again thanks everyone for all the help! Best wishes, Viviana 2016-09-07 21:35 GMT+02:00 pablo.diaz.jarufe <pablo.diaz.jar...@gmail.com>: > Hello Viviana > Working with DAVID I noticed that the textures of the OBJ files. are > saved in PNG format, not in JPG; and all the views are in the same file. > There is any way to create this kind of PNG. file with your pictures?. May > be this correction could work fine in meshlab. > I hope this information will be useful > Best > > > El jueves, 1 de septiembre de 2016, 8:31:47 (UTC-3), mtoroibacache > escribió: >> >> 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: mtoroi...@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. > -- *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. 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