Multi-view stereo ranging via Distributed Ray Tracing

We explore the use of Distributed Ray Tracing (DRT), an anti-aliasing technique from computer graphics, in multi-view computational stereo. As an example, we study ABM, a multi-view stereo algorithm based on a set of Hough transform accumulation operations. Augmenting ABM with DRT improves both internal signal quality and reconstruction accuracy. Results are given for both fundamental and complex “super-resolution reconstruction” tasks, where the voxel side length is less than the image ground sample distance. DRT improves ABM accuracy by 18% and can be generalized to improve other stereo algorithms.