Optimal pulse width modulation for sinusoidal fringe generation with projector defocusing
نویسندگان
چکیده
منابع مشابه
Optimal pulse width modulation for sinusoidal fringe generation with projector defocusing
Recently, a study showed that generating sinusoidal fringe patterns by properly defocusing binary ones can significantly simplify three-dimensional shape measurement system development and drastically improve its speed. However, when the fringe stripes are very wide, it is very difficult for this technique to achieve high-quality measurement. This Letter presents a method to improve this techni...
متن کاملOptimal pulse-width modulation for sinusoidal fringe generation with projector defocusing: comment.
We comment on a recent Letter [Opt. Lett. 35, 4121 (2010)], in which the authors discuss an optimal pulse-width modulation (OPWM) method for sinusoidal fringe generation. We consider that the comparison of the squared binary method (SBM) and the sinusoidal pulse-width modulation (SPWM) method has considerable deficiencies.
متن کاملComparison of the squared binary, sinusoidal pulse width modulation, and optimal pulse width modulation methods for three-dimensional shape measurement with projector defocusing.
This paper presents a comparative study on three sinusoidal fringe pattern generation techniques with projector defocusing: the squared binary defocusing method (SBM), the sinusoidal pulse width modulation (SPWM) technique, and the optimal pulse width modulation (OPWM) technique. Because the phase error will directly affect the measurement accuracy, the comparisons are all performed in the phas...
متن کاملOptimized pulse width modulation pattern strategy for three-dimensional profilometry with projector defocusing.
Three-dimensional profilometry by sinusoidal fringe projection using phase-shifting algorithms is usually distorted by the nonlinear intensity response of commercial video projectors. To overcome this problem, several methods including sinusoidal pulse width modulation (SPWM) were proposed to generate sinusoidal fringe patterns with binary ones by defocusing the project to some certain extent. ...
متن کاملA comparison study of digital sinusoidal fringe generation technique: defocusing binary patterns VS focusing sinusoidal patterns
With the recent advancements in digital technology, three-dimensional (3-D) shape measurement has played an increasingly important role in fields including manufacturing, homeland security, medical sciences, and entertainment. Over the past decades, numerous 3D shape measurement techniques have been developed. Among these existing techniques, fringe analysis based on phase-shifting sinusoidal s...
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ژورنال
عنوان ژورنال: Optics Letters
سال: 2010
ISSN: 0146-9592,1539-4794
DOI: 10.1364/ol.35.004121