Isochromatics demodulation from a single image using the regularized phasetracking technique

In this work we propose a robust fringe demodulation technique applied to t he analysis of a single isochromatics fringe pattern produced in photoelast icity. The method used is a regularized phase tracking algorithm with a new sequential scanning technique specifically adapted for the characteristics of the isochromatic fringe patterns: possible apparition of closed fringes , large dynamic range in its spatial frequency content and low noise. The p erformance of the method is discussed and experimental results are presente d.