Stuart Attenborrow writes:
I've recently written an addon that may be useful to those of you using Blender's camera tracker for VFX, or those interested in photogrammetry.
I've been attempting to reconstruct sparse, low resolution images where a normal automated pipeline fails. The usual fix is to take more photos but I'm unable to do so and must work with what I have. Autodesk had an application in the past called ImageModeler which met this need but has since been discontinued with no avenue for licensing. In essence, ImageModeler was a photogrammetry tool where the user manually placed points and the software solved the camera poses and sparse 3D point cloud. Fortunately, this is exactly what Blender can do!
After solving a camera move in Blender and generating a 3D scene, the addon can be used to leverage either COLMAP or PMVS to reconstruct a dense point cloud from the sparse tracking data.
After reconstruction, the point cloud is imported directly into Blender. This allows you to position objects accurately within your scene using the thousands of new points. You could also use Meshlab to generate a mesh and associated texture from the point cloud and then import this into Blender. This would give you textured geometry that can be reflected or simulated in your VFX shot with minimal effort!
If you come up with something awesome from it, please share!