Improved phase-shifting method for automatic processing of moiré deflectograms
نویسندگان
چکیده
منابع مشابه
Improved phase-shifting method for automatic processing of moiré deflectograms.
An improved moiré deflectometry phase-shifting technique is presented. A squared grating is used to multiplex the information of the deflections in two orthogonal directions in one image. This procedure avoids the need to rotate the gratings to obtain complete deflection information. However, the use of these gratings makes impossible the application of standard phase-shifting algorithms. Speci...
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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 ar...
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We present a new method of regional identification, partition, and integral (RIPI) phase unwrapping for processing images, especially those with low quality, obtained from moiré interferometry experiments. By introducing the principle of preorder traversal of a general tree in data structures and then by applying the idea of a regional integral, the proposed method makes regional partition and ...
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ژورنال
عنوان ژورنال: Applied Optics
سال: 1998
ISSN: 0003-6935,1539-4522
DOI: 10.1364/ao.37.006227