Rhombus phase unwrapping algorithm under temporal multiplexing mechanism of phase-shifting fringe

This paper addresses the significance of phase unwrapping algorithms in optical measurements. It explores an improved rhombus phase unwrapping algorithm based on a temporal multiplexing mechanism of phase-shifted fringe patterns. The algorithm aims to enhance the accuracy and stability of relative phase unwrapping. Firstly, the temporal multiplexing technique using phase-shifted fringe patterns is employed to acquire wrapped phase information from different sequences, thereby increasing the availability of phase information. Subsequently, the improved rhombus phase unwrapping algorithm is applied using the multiplexed templates, utilizing the phase differences between adjacent pixels for phase unwrapping. During the algorithmic process, the classification strategy for independent pixels introduced by temporal multiplexing enhances the robustness and computational efficiency of the algorithm. Experimental results demonstrate that the improved rhombus phase unwrapping algorithm under the temporal multiplexing mechanism effectively restores the phase information of the measured object and exhibits strong anti-interference capabilities in complex backgrounds. This research provides a novel solution for the application of phase unwrapping algorithms in the field of optical measurements.