99 comentários

• Tatiana Al-Chueyr Pereira Martins(usuário não autenticado)

  29 de Março de 2008, 15:19

   

  Hi Eugene,

  Welcome to InVesalius International forum!

  Currently InVesalius only supports exporting 3D models in STL format. We are considering implementing other output options, but there are no plans.

  Which other output file formats do you think would be interesting?

  Best Regards,

  Tatiana

  
  

  • Liscio Eugene(usuário não autenticado)

    31 de Março de 2008, 0:36

     

    Oi Tatiana,

    Muito obrigado para sua reposta (I don't know if I spelled that right....ha).

    Actually, what is the largest concern for me is the density of the mesh.  I use 3DS Max for visualization and it really can't handle the millions of verteces.

    Possibly the most common format for all 3D programs like Max, Maya, Lightwave, C4D and XSI would be OBJ.

    Is there another way to control the density of the mesh which is output?

    Thanks,

    Eugene

    
    

    • Tatiana Al-Chueyr Pereira Martins(usuário não autenticado)

      31 de Março de 2008, 1:07

       

      Hi Eugene!

      Your Portuguese is very good, well done! :) The only suggestion is to change "para" (similar to English "to" expression) for "por" (usually used to express English "for"). It is very overwhelming to see foreign interested on learning Portuguese. Soon you'll be posting your questions on InVesalius Portuguese users’ forum... ;)

      Unfortunatelly currently there is no way to control the density of the mesh which is output. 

      I've just verified about exporting 3D data in OBJ file format. Apparently VTK library, which is used to implement InVesalius, allows exporting data in this format. Could you check if this description is accurate to what you need?

      "Export a scene into Wavefront format.
      vtkOBJExporter (..) writes wavefront .OBJ files in ASCII form. It also writes out a mtl file that contains the material properties." [1]

      If this is what you want, apparently we could quickly implement this functionality into InVesalius. However, as our team has no experience with this type of data, you'd be responsible for testing it and making suggestions / describing results.

      Best regards,

      Tatiana

      [1] www.​vtk.​org/​doc/​nigh​tly/​html​/cla​ssvt​kOBJ​Expo​rter​.htm​l

      
      

      • Liscio Eugene(usuário não autenticado)

        31 de Março de 2008, 11:13

         

        Oi Tatiana, OK, I will tell you a secret... Although I am Canadian, my wife is Brazilian. 

        I have been to Brazil many times.  In fact, we just came back from 2.5 months in Florianopolis.  You have a very beautiful country and I really enjoy going there.

        So, I actually speak enough Portuguese to be dangerous  :)  However, since I learned Portuguse "on the street", my writing is terrible.

        I would be more than happy to help you test the OBJ export. I can try to have it import in a couple of pieces of CAD software and 3D visualization packages to see if there are any differences or issues.

        Also, since I only started looking at DICOM files and InVesalius last Friday, I actually found vtk on the net, but when I ran it, I noticed that it had no user interface or anything like that...so, I was lost without more research. 

        One more question...is it possible to reduce the number of "slices" used when converting to the 3D format?  For example, can we use half the number of interval slices and still get a decent model? 

        Abracos,

        Eugene

        
        

        • Tatiana Al-Chueyr Pereira Martins(usuário não autenticado)

          8 de Abril de 2008, 9:03

           

          Hi Eugene,

          Sorry for my late reply. I was writing the chapter of a book and only now I`m managing to reply forum messages.

          In your next travel to Brazil, you and your wife are invited visit CenPRA (Campinas / SP), where we develop InVesalius and rapid prototyping research. Let me know if you have interest.

          [Eugene]: Also, since I only started looking at DICOM files and InVesalius last Friday, I actually found vtk on the net, but when I ran it, I noticed that it had no user interface or anything like that...so, I was lost without more research.
          VTK is a powerfool toolkit, used to build up softwares. Even programmers don't find it easy to use... ;)

          [Eugene]: I would be more than happy to help you test the OBJ export. I can try to have it import in a couple of pieces of CAD software and 3D visualization packages to see if there are any differences or issues.
          We've made some testings on OBJ export and... well, I guess they were a bit frustating. You might see a .obj generated by InVesalius 2 at: www.​soft​ware​publ​ico.​gov.​br:/​dotl​rn/c​lubs​/inv​esal​ius/​file​-sto​rage​/?pa​ckag​e_id​=626​894&​amp;​fold​er_i​d=36​4958​4

          We've downloaded a free obj viewer, to check if the file was generated appropriately. Appearently it was, but it seems to have a texture... while it shouldn't. This might have been caused by normals pointing to the wrong direction... but I'm not sure. Do you have any idea? We'll make some other tests, to see if we can improve this surface. The colour is adequate (I had generated using a blue mask).

          [Eugene]: One more question...is it possible to reduce the number of "slices" used when converting to the 3D format? For example, can we use half the number of interval slices and still get a decent model?
          Regarding the number of slices, it is possible to choose which slices you want to reconstruct, on the import frame (InVesalius 2). Double clicking (left button) on the file name will include ir or not. We hadn't tested this feature for skipping slices between... I've tested, and the result is not good. The volume appears to be "smashed". We'll try to fix this and, as soon as this works, we'll create a new update.

          Abraços,

          Tatiana

          
          

          • Tatiana Al-Chueyr Pereira Martins(usuário não autenticado)

            8 de Maio de 2008, 17:06

             

            Hi Eugene,

            We've made a pre-release so you might test .OBJ generation. It is available at:

            www.​soft​ware​publ​ico.​gov.​br/d​otlr​n/cl​ubs/​inve​sali​us/f​ile-​stor​age/​down​load​/InV​esal​ius 2.0.28-pre-obj.exe?file%5fid=4080878

            It is necessary to generate a 3D model using segmentation or editor tools. Then, you should go on the upper menu in:
            File => Export => Volume

            And there you might find .OBJ export option.

            Please, let us know if this is working appropriately.

            Best regards,

            Tatiana 

            
            

            • Liscio Eugene(usuário não autenticado)

              30 de Junho de 2008, 10:23

               

              Hi Tatiana,

              I had some problems with this file but I think I have it now "InVesalius 2.0.28-pre-obj[1]".

               

              I had to rename the file to add ".exe" on the end.

               

              Eugene

              
              

              • Tatiana Al-Chueyr Pereira Martins(usuário não autenticado)

                10 de Julho de 2008, 16:51

                 

                Hi Eugene,

                We've found out and fixed the problem that was occuring with the DICOM you showed InVesalius was crushing with.

                At monday we should be releasing a new build with this problem fixed, ok?

                Till tomorrow 3pm (Brazil).

                Regards,

                Tatiana 

                
                

                • Liscio Eugene(usuário não autenticado)

                  5 de Agosto de 2008, 11:56

                   

                  .hmmessage P { margin:0px; padding:0px } body.hmmessage { FONT-SIZE:
                  10pt; FONT-FAMILY:Tahoma } Oi Tati,

                  Are you around today? If you have time, please let me know.

                  Regards,

                  Eugene

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