​​This is not a paper, but it is awesome!
App Polycam uses a builtin LIDAR sensor in the latest iPad Pro to scan the surroundings and build a textured 3D mesh. The mesh is “generally accurate down to about one inch”. The process is also near-real-time: processing is done locally on the tablet, with single-room captures taking “only seconds to process”, making it possible to see the mesh building up as you walk around. Looks like it's one of the best 3D scanning app out there (for arbitrary objects, see 3D sofa example here).

However, it relies on LIDAR which we can find only in the latest iPad Pro and upcoming iPhone 12 Pro. It would be much more exciting if they used pure RGB-based techniques, e.g. SLAM which does no require a LIDAR or a depth camera. I will come back to this and will briefly discuss some techniques for building 3D shapes from images in future posts.