Re: HELP in Delaunay Triangulation

"Sherman Tse" <man_superman_batman_007@xxxxxxxxx> wrote in message
<fv9qtm$f0o$1@xxxxxxxxxxxxxxxxxx>...
Dear John

Sorry for the insufficient details!

Let me explain it a little bit more!

My project is to use 3D point cloud data to reconstruct a
real 3D model back!! My project is to use the Digiclops to
get the point cloud data of a human face.

The point cloud data has X Y Z coordinates, RGB value of
each vertex.

Would the Delaunay Triangulation be appropriate appraoch!??

I have used the "surfi" in FEX . the Triangulation is not
what I want, I want to create another Triangualtion method.
I want to create triangles from every point, so that I can
map the color of each vertex and then interpolate the color
to reconstruct a real model back.

I have called the "delaunay" and "delaunay3" in the matlab.
however, the triangles are too big that the model is
accurate enough to show the contour of the human face.

What should I do, Could you please help me to create an
algorithm??PLease give me some inspiration!!

The problem is not that the triangles are
too big. The problem is that your point
"cloud" does not in fact arise from a convex
object. A face would have indentations that
are covered over by those large facets,
since a delaunay tessellation will always
be convex. Delaunay triangulations are
simply not the proper tool or these
problems.

John
.

Relevant Pages

  • Re: HELP in Delaunay Triangulation
    ... get the point cloud data of a human face. ... Would the Delaunay Triangulation be appropriate appraoch!?? ... to reconstruct a real model back. ... accurate enough to show the contour of the human face. ...
    (comp.soft-sys.matlab)
  • How do I get triangles from a vtkPolyData object?
    ... I can get the vertex corredinates like this: ... I can see that there are 84 triangles, ... something useful out of the cells or polys. ... what's created as output from the Delaunay triangulation ...
    (comp.lang.python)
  • Re: Deleting row if entry appeared before
    ... What I want is to break the delaunay triangulation into non overlaping quadrilaterals composed of 2 triangles. ...
    (comp.soft-sys.matlab)
  • Re: Patch object functions
    ... compute a Delaunay triangulation of the polygon domain in release R2009a. ... Representations should you identify neighboring triangles. ...
    (comp.soft-sys.matlab)
  • Re: delaunay triangulation
    ... I don't understand if you need to replace the deleted triangles. ... in fact i just need to delete a point in the delaunay triangulation, ... then update the matrix "tri" which is the Nx3 matrix containing the ...
    (comp.soft-sys.matlab)