Journal ArticleDOI
A Robust and Simple Measure for Quality-Guided 2D Phase Unwrapping Algorithms
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TLDR
A novel quality measure is proposed that is consistent, technically sound, effective, fast to compute, and immune to the presence of a carrier signal.Abstract:
Quality-based 2D phase unwrapping algorithms provide one of the best tradeoffs between speed and quality of results. Their robustness depends on a quality map, which is used to build a path that visits the most reliable pixels first. Unwrapping then proceeds along this path, delaying unwrapping of noisy and inconsistent areas until the end, so that the unwrapping errors remain local. We propose a novel quality measure that is consistent, technically sound, effective, fast to compute, and immune to the presence of a carrier signal. The new measure combines the benefits of both the quality-guided and the residue-based phase unwrapping approaches. The quality map is justified from the two different theoretical points of view. Exhaustive tests on a variety of artificially generated and real 2D wrapped phase signals illustrate its potential usefulness in the field of fringe projection profilometry.read more
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Enhanced high dynamic range 3D shape measurement based on generalized phase-shifting algorithm
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References
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Journal Article
Fourier-transform method of fringe-pattern analysis for computer-based topography and interferometry
TL;DR: In this article, a fast Fourier transform method of topography and interferometry is proposed to discriminate between elevation and depression of the object or wave-front form, which has not been possible by the fringe-contour generation techniques.
Journal ArticleDOI
Fourier-transform method of fringe-pattern analysis for computer-based topography and interferometry
TL;DR: In this paper, a fast Fourier transform method of topography and interferometry is proposed to discriminate between elevation and depression of the object or wave-front form, which has not been possible by the fringe-contour generation techniques.
Journal ArticleDOI
Satellite radar interferometry: Two-dimensional phase unwrapping
TL;DR: In this paper, an approach to 'unwrapping' the 2 pi ambiguities in the two-dimensional data set is presented, where it is found that noise and geometrical radar layover corrupt measurements locally, and these local errors can propagate to form global phase errors that affect the entire image.
Book
Handbook of Filter Synthesis
TL;DR: In this article, the authors present the theory of effective PARAMETERS in terms of the effectiveness of different types of filters in the real-time domain and the effect of different filters on the performance of the network.
Journal ArticleDOI
Fast two-dimensional phase-unwrapping algorithm based on sorting by reliability following a noncontinuous path.
TL;DR: This work describes what is to the authors' knowledge a novel technique for phase unwrapping that uses a different type of reliability function and does not follow a continuous path to perform the unwrapped operation.