Two 3D spatial phase unwrapping algorithms for dynamic 3D shape measurement

Abstract

Phase unwrapping is a key step of three-dimensional (3D) shape measurement in fringe projection profilometry (FPP). In this paper, 3D quality-guided (3DQG) phase unwrapping algorithm and 3D fast phase unwrapping (3DFPU) algorithm are designed, programmed and applied in the 3D shape measurement of dynamic scenes. Simulated and actual experiments are conducted to compare the performance between the 3D algorithms for 3D wrapped phase in whole and their corresponding two-dimensional (2D) algorithms for 2D wrapped phase frame by frame. The results show that 3D spatial phase unwrapping (SPU) algorithms have higher unwrapping success rate in severely noisy regions and can overcome some discontinuous problems which is truly benefit for the accurate reconstruction of dynamic 3D.

KEYWORDS:

• Three-dimensional shape measurement
• dynamic measurement
• fringe projection profilometry
• spatial phase unwrapping

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by the National Natural Science Foundation of China [grant number 61675141, 62075143].