Author
Qican Zhang
Bio: Qican Zhang is an academic researcher from Sichuan University. The author has contributed to research in topics: Structured-light 3D scanner & Computer science. The author has an hindex of 18, co-authored 81 publications receiving 1474 citations.
Papers published on a yearly basis
Papers
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TL;DR: The basic principles and typical applications of this technique based on grating projected and fringe analysis, which attracts the attention and research effort in the past ten years, has been targeted as main objective to review.
483 citations
TL;DR: A detailed comparison of classical, two-section, and stack-chain guiding strategies are chosen for comparison and the classical guiding strategy with a data structure of indexed interwoven linked list is the one to use.
Abstract: Quality-guided phase unwrapping is a widely used technique with different quality definitions and guiding strategies reported. It is thus necessary to do a detailed comparison of these approaches to choose the optimal quality map and guiding strategy. For quality maps, in the presence of noise, transform-based methods are found to be the best choice. However in the presence of discontinuities, phase unwrapping is itself unresolved and hence quality-guided phase unwrapping is not sufficient. For guiding strategies, classical, two-section, and stack-chain guiding strategies are chosen for comparison. If accuracy is the foremost criterion then the classical guiding strategy with a data structure of indexed interwoven linked list is best. If speed is of essence then the stack-chain guiding strategy is the one to use.
245 citations
TL;DR: A new complementary Gray-code method is proposed in this paper as well as the corresponding phase-unwrapping method, which can reliably reconstruct the nature phase distribution of the tested object with only one extra fringe pattern.
142 citations
TL;DR: The restored vibration of the drumhead is presented in an animation and the membrane vibration of Chinese drum has been measured with a high speed sampling rate of 1,000 frames/sec and a standard deviation of 0.075 mm.
Abstract: A high-speed optical measurement for the vibrating drumhead is presented and verified by experiment. A projected sinusoidal fringe pattern on the measured drumhead is dynamically deformed with the membrane vibration and grabbed by a high-speed camera. The shape deformation of the drumhead at each sampling instant can be recovered from this sequence of obtained fringe patterns. The membrane vibration of Chinese drum has been measured with a high speed sampling rate of 1,000 frames/sec. and a standard deviation of 0.075 mm. The restored vibration of the drumhead is also presented in an animation.
131 citations
TL;DR: A new window-based method for stereo matching that divides the matching process into two steps, initial matching and disparity calibration, showing that this method is better than other local methods on standard stereo benchmarks.
99 citations
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Journal Article•
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.
Abstract: A fast-Fourier-transform method of topography and interferometry is proposed. By computer processing of a noncontour type of fringe pattern, automatic discrimination is achieved between elevation and depression of the object or wave-front form, which has not been possible by the fringe-contour-generation techniques. The method has advantages over moire topography and conventional fringe-contour interferometry in both accuracy and sensitivity. Unlike fringe-scanning techniques, the method is easy to apply because it uses no moving components.
3,742 citations
TL;DR: This paper presents a meta-analyses of Fourier-Transform Profilometry and its applications in 3-D Shape Measurement and Surface Profile Measurement for Structured Light Pattern and 4-Core Optical-Fiber.
1,110 citations
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.
611 citations
TL;DR: The results show that the multi-frequency temporal phase unwrapping provides the best unwrapped reliability, while the multi -wavelength approach is the most susceptible to noise-induced unwrappers errors.
598 citations
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.
514 citations