%0 Journal Article
%A Quiroga Mellado, Juan Antonio
%A Servín Guirado, Manuel
%A Cuevas de la Rosa, Francisco Javier
%T Modulo 2π fringe orientation angle estimation by phase unwrapping with a regularized phase tracking algorithm
%D 2002
%@ 0740-3232
%U https://hdl.handle.net/20.500.14352/58778
%X 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 aretangent 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 pi. 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.
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