Phase unwrapping in fringe projection systems using epipolar geometry

A new method for phase unwrapping is introduced which realizes the unwrapping of phase images without binary codes produced by fringe projection systems using at least two cameras and one projector. The novelty of the method is the use of the epipolar geometry between the two cameras and the projector in order to achieve a unique point correspondence. The method is suited for systems which should realize a short recording time for the image sequence acquisition. It is very robust even at positions with abrupt change of depth.