Journal ArticleDOI
Color phase-shifting technique for three-dimensional shape measurement
TLDR
Experimental results show that the second solution—modification of the camera together with an imbalance compensation algorithm—would effectively reduce the errors and produce better measurement results than the software-based compensation method.Abstract:
A color phase-shifting technique has been recently developed for high-speed 3-D shape measurement. In this technique, three sinusoidal phase-shifted images used for a measurement cycle in a traditional grayscale phase-shifting technique are encoded into one color image. Therefore, only a single color image is needed for reconstructing the 3-D surface shape of an object. The measurement speed can then be increased up to the frame rate of the camera. However, previous experimental results showed that the measurement accuracy of this technique was initially low, due largely to the coupling and imbalance of color channels. In this paper, two solutions, one software-based and one hardware-based, are proposed to compensate for these errors. Experimental results show that the second solution—modification of the camera together with an imbalance compensation algorithm—would effectively reduce the errors and produce better measurement results than the software-based compensation method. This technique has many potential applications in high-speed measurement, such as highway inspection and dynamic measurement of human body.read more
Citations
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Journal ArticleDOI
Phase shifting algorithms for fringe projection profilometry: A review
TL;DR: An overview of state-of-the-art phase shifting algorithms for implementing 3D surface profilometry is presented to provide a useful guide to the selection of the most appropriate phase shifting technique for a particular application.
Journal ArticleDOI
High-speed 3D shape measurement with structured light methods: A review
TL;DR: The fundamental principles behind the primary state-of-the-art 3D shape measurement techniques based on structured light methods will be elucidated, experimental results will be presented to demonstrate capabilities and/or limitations for those popular techniques, and perspectives on those remaining challenges to be conquered to make advanced 3Dshape measurement techniques ubiquitous are presented.
Journal ArticleDOI
Review of single-shot 3D shape measurement by phase calculation-based fringe projection techniques
TL;DR: The single-shot 3D shape measurement techniques by projecting and capturing one fringe pattern image on the object surface, the wrapped phase demodulation algorithms from one captured image are reviewed.
Journal ArticleDOI
Multilevel quality-guided phase unwrapping algorithm for real-time three-dimensional shape reconstruction
TL;DR: A multilevel quality-guided phase unwrapping algorithm for real-time 3D shape measurement is presented and it is demonstrated that this algorithm improves the previous scan-line phase unwrap algorithm significantly although it reduces its processing speed slightly.
Patent
Multiple channel locating
TL;DR: In this paper, the location on the object is illuminated with a portion of each of two or more of the radiation patterns, the location producing multiple object radiations, each object radiation produced in response to one of the multiple radiation patterns.
References
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Journal ArticleDOI
Overview of three-dimensional shape measurement using optical methods
TL;DR: An overview of 3-D shape measurement using various optical methods, and a focus on structured light tech- niques where various optical configurations, image acquisition technology, data postprocessing and analysis methods and advantages and limitations are presented.
Journal ArticleDOI
Color-encoded digital fringe projection technique for high-speed three-dimensional surface contouring
TL;DR: Contouring speed, limited only by the frame rate of the camera, can be dramatically increased as compared to that of the traditional phase-shifting techniques.
Journal ArticleDOI
Rainbow three‐dimensional camera: new concept of high‐speed three‐dimensional vision systems
Journal ArticleDOI
Fast profilometer for the automatic measurement of 3-D object shapes.
Shouhong Tang,Yau Y. Hung +1 more
TL;DR: A fast technique for automatic 3-D shape measurement that can automatically and accurately obtain the phase map or the height information of a measured object at every pixel point without assigning fringe orders and interpreting data in the regions between the fringe orders is proposed and verified by experiments.
Proceedings ArticleDOI
3-D data acquisition by Rainbow Range Finder
Johji Tajima,M. Iwakawa +1 more
TL;DR: The authors propose a novel practical calibration scheme which makes range measurement for all visible pixels possible and an experimental system was developed on that basis, and measurement accuracy was evaluated.
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