Computer-generated Moiré profilometry.
TLDR
A new 3D measuring method based on computer-generated moiré fringes that is of great potential in real-time or even dynamical 3D measurement due to its single-shot deformed pattern feature, and it avoids the influences of the object's reflectivity simultaneously.Abstract:
A new 3D measuring method based on computer-generated moire fringes is proposed. The two AC components of the 0-degree and 90-degree phase-shifted fringe patterns on reference plane are prepared in advance. While the AC component of the single-shot deformed pattern is multiplied by the two prepared AC components, respectively, two computer-generated moire fringes can be retrieved. The ratio of the two computer-generated moire fringes is just the tangent of the phase modulated by the object. It is of great potential in real-time or even dynamical 3D measurement due to its single-shot deformed pattern feature, and it avoids the influences of the object's reflectivity simultaneously. Compared to the Fourier transform profilometry, its error is smaller due to its higher first-order spectrum. Experimental results show the feasibility and validity of the proposed method.read more
Citations
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Journal ArticleDOI
High precision computer-generated moiré profilometry
TL;DR: By adding an additional special phase-shifting sinusoidal grating to accurately extract valid information in the spatial domain and improve thesinusoidal feature of the pattern, the measurement precision can be improved effectively.
Journal ArticleDOI
Orthogonal modulated computer-generated moiré profilometry
TL;DR: In this article, an orthogonal modulated computer-generated moire profilometry is proposed to estimate the 3D shape of an object using only one deformed composite pattern.
Journal ArticleDOI
Improved computer-generated moiré profilometry with flat image calibration.
TL;DR: In this paper, an improved computer-generated moire profilometry (CGMP) with flat image calibration is proposed, which can effectively suppress the influence of ambient light and ensure the measurement accuracy, even if spectrum aliasing exists.
Journal ArticleDOI
One-shot dual-projection topography enhanced by phase-shifting logical moiré.
Jiajia Jiang,Hongwei Guo +1 more
TL;DR: In this article, an enhanced dual-projection moire topography by means of logical moire is presented, where a couple of projectors project two fringe patterns of different colors onto the object simultaneously and then a color camera captures the deformed fringe pattern.
Journal ArticleDOI
Fast 3D measurement based on improved optical flow for dynamic objects
TL;DR: Experiments and simulations prove that the improved optical flow algorithm is introduced to replace correlation calculation in pixel matching and can improve the efficiency of pixel matching by 42 times and 3D reconstruction by 32 times on the premise of ensuring the accuracy.
References
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Journal ArticleDOI
Fourier transform profilometry for the automatic measurement of 3-D object shapes
Mitsuo Takeda,Kazuhiro Mutoh +1 more
TL;DR: A new computer-based technique for automatic 3-D shape measurement is proposed and verified by experiments that has a much higher sensitivity than the conventional moire technique and is capable of fully automatic distinction between a depression and an elevation on the object surface.
Journal ArticleDOI
Structured-light 3D surface imaging: a tutorial
TL;DR: The high-speed and high-resolution pattern projection capability offered by the digital light projection technology may enable new generation systems for 3D surface measurement applications that will provide much better functionality and performance than existing ones in terms of speed, accuracy, resolution, modularization, and ease of use.
Journal ArticleDOI
Automated phase-measuring profilometry of 3-D diffuse objects
TL;DR: The high resolution surface profile of a 3-D diffuse object is obtained by measurement of the phase distribution across the image of a projected sinusoidal grating deformed by the surface, based on phase-shifting interferometric techniques.
Journal ArticleDOI
Recent progresses on real-time 3D shape measurement using digital fringe projection techniques
TL;DR: The principles of the real-time 3D shape measurement techniques that were developed are presented, the most recent progresses that have been made in this field are summarized, and the challenges for advancing this technology further are discussed.
Journal ArticleDOI
Reliability-guided phase unwrapping algorithm: a review ☆
Xianyu Su,Wenjing Chen +1 more
TL;DR: A phase unwrapping algorithm based on the reliability-guided parameter map is reviewed, which shows that in the worse case the error is limited, if there is any, to local minimum areas.
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