Phase unwrapping error reduction framework for a multiple-wavelength phase-shifting algorithm
TLDR
A framework to reduce the unwrapping errors of the measurement system using a digital multiple-wavelength phase- shifting algorithm and significantly alleviated the measurement errors caused by the phase noise.Abstract:
We address a framework to reduce the unwrapping errors of the measurement system using a digital multiple-wavelength phase- shifting algorithm. In particular, the following framework is proposed: 1 smooth the raw phase by smoothing the sine and cosine images of the phase computation of the inverse tangent function; 2 locate and re- move the incorrectly unwrapped points by the monotonicity condition of the phase map; 3 obtain the unwrapped phase map for the shortest wavelength without smoothing; 4 detect holes and fill them to preserve as much useful information as possible. Experiments demonstrated that the proposed framework significantly alleviated the measurement errors caused by the phase noise. © 2009 Society of Photo-Optical Instrumentationread more
Citations
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Journal ArticleDOI
An improved temporal phase unwrapping based on super-grayscale multi-frequency grating projection
TL;DR: In this article , a high accuracy temporal phase unwrapping method based on super-grayscale multi-frequency grating projection is proposed to reduce the digital error in each wrapped phase calculation.
Dissertation
A Novel Sensory System for the 3D Surface Profiling of Small Complex Objects
TL;DR: In this article, a design methodology for determining the optimal triangulation configuration to reduce reconstruction errors, and to maximize unique pixel-to-pixel correspondences and coverage of the measurement volume is presented.
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Invalid point removal method based on error energy function in fringe projection profilometry
TL;DR: In this article , an improved Gaussian filtering method based on modulation intensity is used to significantly increase the error energy difference between the valid points of the target and the invalid points in the shadow/background area.
Journal ArticleDOI
Edge-preserved fringe-order correction strategy for code-based fringe projection profilometry
TL;DR: An edge-preserved fringe-order correction strategy has been proposed to tackle the fringe order noise problem and, unlike the proprietary denoising algorithms, the correction approach is suitable for all types of CBFPP.
References
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Book
Two-Dimensional Phase Unwrapping: Theory, Algorithms, and Software
Dennis C. Ghiglia,Mark D. Pritt +1 more
TL;DR: Methods for Phase Unwrapping, Phase Data, Quality Maps, Masks, and Filters, and Minimum-Norm Methods.
Journal ArticleDOI
Temporal phase-unwrapping algorithm for automated interferogram analysis.
TL;DR: An alternative approach based on one-dimensional unwrapping along the time axis is proposed, applicable to an important subclass of interferometry applications, in which a sequence of incremental phase maps can be obtained leading up to the final phase-difference map of interest.
Two-wavelength phase-shifting interferometry (A)
Yeou-Yen Cheng,James C. Wyant +1 more
TL;DR: A technique that combines ideas of phase shifting interferometry (PSI) and two-wavelength interferometer (TWLI) to extend the phase measurement range of conventional single-wa wavelength PSI is described.
Journal ArticleDOI
Two-wavelength phase shifting interferometry.
Yeou-Yen Cheng,James C. Wyant +1 more
TL;DR: In this article, a technique that combines ideas of phase shifting interferometry (PSI) and two-wavelength interference (TWLI) to extend the phase measurement range of conventional singlewavelength PSI is described.
Journal ArticleDOI
Temporal phase unwrapping: application to surface profiling of discontinuous objects.
TL;DR: The recently proposed technique of temporal phase unwrapping has been used to analyze the phase maps from a projected-fringe phase-shifting surface profilometer, showing the error in height is shown to decrease inversely with the number of phase maps used.
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