Abstract
The fringe orientation angle provides useful information for many fringe-pattern-processing techniques. From a single normalized fringe pattern (background suppressed and modulation normalized), the fringe orientation angle can be obtained by computing the irradiance gradient and performing a further arctangent computation. Because of the 180° ambiguity of the fringe direction, the orientation angle computed from the gradient of a single fringe pattern can be determined only modulo π. Recently, several studies have shown that a reliable determination of the fringe orientation angle modulo 2π is a key point for a robust demodulation of the phase from a single fringe pattern. We present an algorithm for the computation of the modulo 2π fringe orientation angle by unwrapping the orientation angle obtained from the gradient computation with a regularized phase tracking method. Simulated as well as experimental results are presented.
© 2002 Optical Society of America
Full Article | PDF ArticleMore Like This
Daniel Crespo, Juan Antonio Quiroga, and Jose Antonio Gomez-Pedrero
Appl. Opt. 43(33) 6139-6146 (2004)
Jesús Villa, Ismael De la Rosa, Gerardo Miramontes, and Juan Antonio Quiroga
J. Opt. Soc. Am. A 22(12) 2766-2773 (2005)
Haixia Wang and Qian Kemao
Appl. Opt. 51(4) 413-421 (2012)