Fast 3D shape measurement using Fourier transform profilometry without phase unwrapping

• A novel, simple, yet fast 3D shape measurement method using Fourier transform profilometry is proposed.
• The binocular stereo vision and two image pairs are introduced to restructure 3D shape.
• The local phase matching and sub-pixel disparity refinement are proposed to obtain high measuring accuracy.

This paper presents a novel, simple, yet fast 3D shape measurement method using Fourier transform profilometry. Different from the conventional Fourier transform profilometry, this proposed method introduces the binocular stereo vision and employs two image pairs (i.e., original image pairs and fringe image pairs) to restructure 3D shape. In this proposed method, instead of phase unwrapping algorithm, a coarse disparity map is adopted as a constraint condition to realize phase matching using wrapped phase. Since the local phase matching and sub-pixel disparity refinement are proposed to obtain high measuring accuracy, high-quality phase is not required. The validity of the proposed method is verified by experiments.