Accurate unwrapping method of phase coding based on offset variable
To address the issue of mismatch between wrapped phase and fringe order boundaries in traditional phase coding,an accurate phase coding unwrapping method based on offset variable was proposed.This method introduced an offset variable into the phase solution formula during the resolution of fringe edges,effectively constraining the wrapped phase boundaries to obtain the correct absolute phase.Experimental validation demonstrates that the proposed method effectively eliminates phase jumps due to boundary mismatches,enabling the rapid and accurate recovery of the absolute phase and facilitating three-dimensional reconstruction without an increase in the number of projection images.