The Dark art of colour structured light scanning
Were always looking for new and exciting ways to develop the scanning equipment that we have here at ten24. This model represents a combination scan using both Structured light (Artec) and Photogrammetry (18 Camera AGI rig)
The first Step is to scan the model (Ryan Terry) using our Artec hand held scanner, This provides us with an incredibly clean high resolution mesh shown above
A second scan is then performed using out 18 camera photogrammetry rig, and whilst it does capture a lot of geometric detail such a small number of cameras means it still lags behind the artec in terms of outright quality. It does however capture hugely high resolution texture maps.
Unfortunately we are not going to go into the process of how we exactly align the two meshes but its a lot of work and definitely does not rely on non rigid alignment as some people have speculated. After the we take the model into zbrush and do a quick Qremesh using guide splines. Raw scan data is very hard to work with and re-meshing it with rough topology makes it much easier to edit.
As you can see from the above image the topology is by no means animation ready but for clean-up purposes its much better than 4million triangles.
The mesh is split into poly-groups and UV’d ready for projection
Once the mesh is finalised Its imported back into AGI and the high res textures are applied to the new UV’d model
Projected UV map
Final touch up and seam editing is done using body paint.
This entry was posted on Monday, January 28th, 2013 at 10:47 pm
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