I have been using MeshLab to convert one 3D format to another.
Some time ago I started working on a structured light 3D digitizer, in the original project I used 35mm slides to project known images on the scene. The problem was that the slides did not register well from one frame to the next.
Now I have a digital projector and I have resurrected the project. So I end up with Z-maps which I have to convert to STL files. That got me using MeshLab.
FYI the 3D digitizing is starting to really come together. Hope to post some results in the near future..
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"The best thing about building something new is either you succeed or learn something. Its a win-win situation."
--Greg Westbrook