Dr. Junfei Dai Profile

Dr. Junfei Dai

at Zhejiang Univ

SPIE Involvement:

Author

SPIE Journal Paper | 18 October 2023

Dynamic three-dimensional shape measurement based on an adaptive phase unwrapping method

Wang Xiang, Linrui Wang, Junfei Dai

OE, Vol. 62, Issue 10, 104104, (October 2023) https://doi.org/10.1117/12.10.1117/1.OE.62.10.104104

KEYWORDS: Phase unwrapping, 3D metrology, Cameras, Fringe analysis, Projection systems, Video, 3D modeling, Phase shifts, Optical engineering, Structured light

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Proceedings Article | 27 January 2023 Paper

Real-time 3D face reconstruction based on geometry

Linrui Wang, Wang Xiang, Junfei Dai

Proceedings Volume 12550, 1255021 (2023) https://doi.org/10.1117/12.2666805

KEYWORDS: Nose, Phase shifts, Cameras, Bridges, Reconstruction algorithms, Imaging systems, Structured light, Projection systems, Phase unwrapping, 3D modeling

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Proceedings Article | 17 July 2015 Paper

Zero-phase locking for phase-shifted dithering techniques

Junfei Dai, Song Zhang

Proceedings Volume 9524, 95240J (2015) https://doi.org/10.1117/12.2186285

KEYWORDS: Binary data, Diffusion, Phase shifting, Gaussian filters, Phase shifts, Fringe analysis, Projection systems, Calibration, 3D metrology, Precision measurement

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Proceedings Article | 13 November 2014 Paper

Optimizing binary dithering patterns to improve phase quality

Junfei Dai, Song Zhang

Proceedings Volume 9276, 92760C (2014) https://doi.org/10.1117/12.2070799

KEYWORDS: Phase shifts, Optimization (mathematics), Binary data, Diffusion, Fringe analysis, 3D metrology, Phase shifting, Gaussian filters, Projection systems, Phase shift keying

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SPIE Journal Paper | 25 April 2014

Shape signature based on Ricci flow and optimal mass transportation

Wei Luo, Zengyu Su, Min Zhang, Wei Zeng, Junfei Dai, Xianfeng Gu

OE, Vol. 53, Issue 11, 112209, (April 2014) https://doi.org/10.1117/12.10.1117/1.OE.53.11.112209

KEYWORDS: Optical engineering, 3D acquisition, Associative arrays, 3D scanning, Distortion, Global Positioning System, Brain mapping, Scanners, Phase shifting, Diffusion

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SPIE Journal Paper | 3 January 2014

Three-dimensional shape measurement with dual reference phase maps

Junfei Dai, Chen Gong, Song Zhang

OE, Vol. 53, Issue 01, 014102, (January 2014) https://doi.org/10.1117/12.10.1117/1.OE.53.1.014102

KEYWORDS: Fringe analysis, Calibration, 3D metrology, Projection systems, Cameras, Phase shifts, Phase measurement, Optical engineering, Imaging systems, Quality measurement

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Proceedings Article | 6 September 2013 Paper

Improve dithering technique for 3D shape measurement: phase vs intensity optimization

Junfei Dai, Beiwen Li, Song Zhang

Proceedings Volume 8839, 883904 (2013) https://doi.org/10.1117/12.2022226

KEYWORDS: 3D metrology, Binary data, Fringe analysis, Projection systems, Gaussian filters, Phase shifts, Phase measurement, Quality measurement, Phase shift keying, Modulation

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Proceedings Article | 11 November 2010 Paper

Error analysis for 3D shape measurement with projector defocusing

Ying Xu, Junfei Dai, Song Zhang

Proceedings Volume 7855, 78550T (2010) https://doi.org/10.1117/12.870715

KEYWORDS: Projection systems, Fringe analysis, Binary data, 3D metrology, Calibration, Error analysis, Phase shifts, Cameras, Shape analysis, Digital Light Processing

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Showing 5 of 8 publications

Conference Committee Involvement (5)

Optical Metrology and Inspection for Industrial Applications X

15 October 2023 | Beijing, China

Optical Metrology and Inspection for Industrial Applications IX

5 December 2022 | Online Only, China

Optical Metrology and Inspection for Industrial Applications VIII

11 October 2021 | Nantong, JS, China

Optical Metrology and Inspection for Industrial Applications VII

12 October 2020 | Online Only, China

Optical Metrology and Inspection for Industrial Applications VI

21 October 2019 | Hangzhou, China

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