Hi Dr. Viviana, thank you very much for your exposition. I noted that there
are several softwares in Geomagic, such as Geomagic Design, Geomagic
Freeform, and Geomagic Wrap. May I know which Geomagic software did you
use? Thank you very much!
On Wednesday, 14 September 2016 18:11:12 UTC+8, mtoroibacache wrote:
> 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,
> 2016-09-07 21:35 GMT+02:00 pablo.diaz.jarufe <pablo.di...@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
>> El jueves, 1 de septiembre de 2016, 8:31:47 (UTC-3), mtoroibacache
>>> 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 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
>>> Email: mtoroi...@odontologia.uchile.cl
>>> Web: www.researchgate.net/profile/Viviana_Toro_Ibacache/
>> MORPHMET may be accessed via its webpage at http://www.morphometrics.org
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> *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
> Web: www.researchgate.net/profile/Viviana_Toro_Ibacache/
MORPHMET may be accessed via its webpage at http://www.morphometrics.org
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