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    Organic modeling from photos?

    Scheduled Pinned Locked Moved Organic Modelling
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    • B Offline
      bjornkn
      last edited by

      Photosketch looks nice, but it is advertised as a tool for creating lowpoly buildings inside SketchUp.
      Just like SU's own PhotoMatch, but with some automation, like undistorted photos, point clouds and higher precision?

      What dense point clouds does is using brute force, just like when using DEMs for generating landscapes. You really often need millions of polys to get a well defined model with crisp details/creases. It often ends up looking like a metaball/blob object.
      The beauty/power of PhotoScan is that it gives you the tools to model from photos fully controlled, and even make very dense automatically surface-fitted meshes like with point clouds, if that's what you want.
      And it can be used with any object, buildings, complex/concave organic forms, terrain - even with glass and shiny objects (which never works with point cloud mesh generators).
      I really doubt that any of the point cloud generators would have any chance to make an automatic model of something like this sharp edged, complicated/overlapping stainless steel sculpture?


      Volare.jpg

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      • pilouP Offline
        pilou
        last edited by

        @unknownuser said:

        I would like to have drone for taking aerial photos

        It's very easy with a kite! 😎

        From this page

        http://kap.online.fr/images/rig1.jpg

        http://kap.online.fr/images/rig2.jpg

        http://kap.online.fr/images/radio.jpg

        http://kap.online.fr/images/eclipse1.jpg

        Frenchy Pilou
        Is beautiful that please without concept!
        My Little site :)

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        • pilouP Offline
          pilou
          last edited by

          I have forgotten PhotoSculpt πŸ˜‰ (just 2 images ! 😎

          Frenchy Pilou
          Is beautiful that please without concept!
          My Little site :)

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          • B Offline
            bjornkn
            last edited by

            Kites (aka KAP) are nice if there's wind and you're not close to people/buildings/trees/power lines.
            Balloons, blimps, RC helis etc are nice if there are no wind, people/buildings etc
            Poles are nice if you want closeups from lower altitudes than possible with a kite, and works fine anywhere, regardless of wind, people/buildings etc.
            Besides, it requires a lot less rigging/setup and is a lot cheaper πŸ˜„
            A sturdy telescopic 7m pole may cost you $100?

            BTW, PhotoSculpt seems to have a very limited use for modeling, as it can only use 2 photos, and only makes a textured 3D relief.

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            • pilouP Offline
              pilou
              last edited by

              @unknownuser said:

              and only makes a textured 3D relief.

              Yes but as it's a 3d file, just make the turn of your object πŸ˜‰
              So maybe 12 photos and past the result πŸ˜‰

              Frenchy Pilou
              Is beautiful that please without concept!
              My Little site :)

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              • B Offline
                bjornkn
                last edited by

                @unknownuser said:

                @unknownuser said:

                and only makes a textured 3D relief.

                Yes but as it's a 3d file, just make the turn of your object πŸ˜‰
                So maybe 12 photos and past the result πŸ˜‰

                Let's see an example? πŸ˜‰

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                • pilouP Offline
                  pilou
                  last edited by

                  I never try πŸ˜‰
                  just tricky fun images β˜€ (from Chaoscope)

                  http://forum.zbrush.fr/index.php?action=dlattach;topic=5689.0;attach=11516;image

                  But I believe that the autor (a French guy πŸ˜‰ should make a new version with this option πŸ˜‰

                  Frenchy Pilou
                  Is beautiful that please without concept!
                  My Little site :)

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                  • B Offline
                    bjornkn
                    last edited by

                    Well, they look pretty flat to me πŸ˜‰

                    I believe it doesn't really work with 3D coordinates, but more like 2 1/2D?
                    According to the info it makes a mesh with 1pixel = 1 face, and then adds depth info to that pixel. WHich means that a 6Mpx image will make a 6Mpoly mesh (or even 12 million triangles?)
                    Making 6 of those around the object (what about from above and below?) and trying to use SU to weld those 6x6 million faces (36 millions!) together won't be a fun job πŸ˜‰
                    It looks like it could work fine for making normal and bump maps though πŸ˜„

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                    • B Offline
                      bjornkn
                      last edited by

                      @unknownuser said:

                      No no, it's a real 3D file x,y,z, format export OBJ

                      Yes, but the x and z are probably in an evenly spaced grid, one per pixel, if there's one vertex (face) per pixel. Then you can't have more than one vertex per xz position (assuming y is the depth), and you will get no details at the top and bottom. That is just like a DEM, where you have a xy grid where each pixel/face will have an altitude z value, making it impossible to get overhangs etc, and with very little, and streaked, details on very steep walls/slopes.

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                      • pilouP Offline
                        pilou
                        last edited by

                        No no, it's a real 3D file x,y,z, format export OBJ
                        and you can increase, decrease decimate numbers of polys
                        as you want inside the prog before the export! πŸ€“


                        photosculpt.jpg

                        Frenchy Pilou
                        Is beautiful that please without concept!
                        My Little site :)

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                        • pilouP Offline
                          pilou
                          last edited by

                          You can obtain the details by some bump or displacement as you have
                          the new calculated texture ! πŸ˜‰
                          Here I have decreased twice from the maximum
                          photosculpt.jpg

                          Frenchy Pilou
                          Is beautiful that please without concept!
                          My Little site :)

                          1 Reply Last reply Reply Quote 0
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