Real-time 3D video imaging with adaptive phase unwrapping method

This paper presents a novel method that does not reqire additional images for 3D video imaging with phase unwrapping technique using geometric constrain based on graident field. Specifically, we creat an artificial absolute phase map Phi(min) at given depth z = z(min) from the former frame. We optimize the z(min) by validate the continuity of computed unwrapped phase with gradient field and deliver the true minimum z value z(min) to next frame. The first frame is reconstructed by a static method. Experiments demonstrate that only three phase-shifted fringe patterns are required to measure moving objects.