Abstract

A new framework for phase recovering from a single fringe pattern with closed fringes is proposed. Our algorithm constructs an unwrapped phase from previously computed phases with a simple open fringes analysis algorithm; twice applied for analyzing horizontal and vertical oriented fringes, respectively. That reduces the closed fringe analysis problem to chose the better phase between the two oriented computed phase and then to estimate the local sign. By propagating the phase sign (and a DC term) by regions (named here tiles), instead of a pixelwise phase propagation, we become more robust and faster the analysis of closed fringe patterns. Additionally, we proposed a multigrid refinement for improving the final computed phase. c○

Citations