I have two 3D human face files in wrl format, two textures are also attached relatively. I would like to merge these two human faces (as we do easily in 2D) to create an average face. Something like 3DMM by V. Blanz. The problem is that the vertices are not same! the first file has 6883 vertices and 13289 faces and the second file has 10001 vertices and 19378 faces! is there any idea to merge them? thank you in advance for short guide documents (not papers)
Fast reply is appreciated.
Geomagic has a Boolean average operation for polygon objects. Used to be in Studio, now in Design X and probably in other versions as well. It should be under the polygons menu.
If you can solve your problem given textured models with the same number of vertices, you could try to decimate the higher resolution one with Meshlab. I know it has a decimation algorithm that is suppose to keep texture also.
One problem I can see you having is that even though the models would have the same number of vertices, it would not have the same triangle connectivity and same parameterization... The rest of the merge process might not work, mostll for the texture part...
I'm not an expert in this area, and came up with this after 3 minutes of thinking and a little googling. This assumes both meshes have the same height. If not, scale one mesh before proceeding. I assume there is a much better way than scaling, and you probably know it.
1) Take the scan planes along each z-axis value for each mesh. This gives you 2 polygons. For each such polygon:
2) Compute the average of the 2 polygons using an approach such as in this paper: An Efficient Algorithm for the Computation of the. Metric Average of Two Intersecting Convex Polygons, with Application to Morphing
3) Construct a new 3d mesh from the point planes. There are plenty of algorithms for this one.
Perhaps the sophisticated retoplogization approaches in a package like Z-brush would let you supersample or decimate one of the meshes to target the # and location of vertices on the other mesh, then you can morph and take the 1/2 way point of the morph.
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