J
Junfei Dai
Researcher at Zhejiang University
Publications - 21
Citations - 521
Junfei Dai is an academic researcher from Zhejiang University. The author has contributed to research in topics: Phase (waves) & Dither. The author has an hindex of 9, co-authored 19 publications receiving 438 citations. Previous affiliations of Junfei Dai include Purdue University & Center of Mathematical Sciences, Zhejiang University.
Papers
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Journal ArticleDOI
Some recent advances on superfast 3D shape measurement with digital binary defocusing techniques
TL;DR: This paper will summarize the recent work on the following three major areas: realization of kHz 3D shape measurement with binary phase-shifting methods; binary pattern improvement with pulse width modulation and binary dithering/halftoning techniques; and applications of superfast 3Dshape measurement techniques.
Journal ArticleDOI
Phase error compensation for three-dimensional shape measurement with projector defocusing
TL;DR: This research experimentally studied a large depth range of defocused fringe patterns, from near-binary to near-sinusoidal, and analyzed the associated phase errors and established a mathematical phase error function in terms of the wrapped phase and the depth z.
Journal ArticleDOI
Phase-optimized dithering technique for high-quality 3D shape measurement
Junfei Dai,Song Zhang +1 more
TL;DR: A framework to optimize the Bayer-dithering technique in phase domain by iteratively mutating the status (0 or 1) of a binary pixel and it is demonstrated that the proposed optimization technique can drastically reduce the phase error when the projector is nearly focused.
Journal ArticleDOI
High-quality fringe pattern generation using binary pattern optimization through symmetry and periodicity
Junfei Dai,Beiwen Li,Song Zhang +2 more
TL;DR: This paper presents a novel method to construct binary patterns for high-quality 3D shape measurement that can achieve substantial phase quality improvements over the dithering techniques for different amounts of defocusing.
Journal ArticleDOI
Intensity-optimized dithering technique for three-dimensional shape measurement with projector defocusing
Junfei Dai,Beiwen Li,Song Zhang +2 more
TL;DR: Both simulations and experiments find that the phase-based optimization method can generate high-quality phase under a given condition, but it is sensitive to the amount of defocusing.