%0 Journal Article
%A Quiroga Mellado, Juan Antonio
%A Villa Hernández, José de Jesús
%A Servín Guirado, Manuel
%T Improved regularised phase-tracking technique for the processing of squared-grating deflectograms
%D 2000
%@ 0003-6935
%U https://hdl.handle.net/20.500.14352/58791
%X We propose a robust procedure based on the regularized phase-tracking (RPT) technique to demodulate squared-grating deflectograms. The use of squared gratings, already reported, lets us multiplex the information of the deflections in two orthogonal directions in a single image, thus avoiding the necessity of rotating the gratings. The good noise-rejection characteristics of the RPT technique are improved by use of a quasi-Newton optimization algorithm and a quality-map-based algorithm for the crystal-growing process.
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