Dr. Nan Gao Profile

Dr. Nan Gao

Optical Engineer at Hebei Univ of Technology

SPIE Involvement:

Author

Publications (18)

Proceedings Article | 9 October 2021 Paper

Clear imaging specular surface and fringe patterns by using a concave mirror in phase measuring deflectometry

Ziyu Li, Xiaohong Liu, Caixia Chang, Yanqing Shi, Nao Gao, Zhaozong Meng, Zonghua Zhang

Proceedings Volume 11899, 1189909 (2021) https://doi.org/10.1117/12.2600851

KEYWORDS: Specular reflections, Mirrors, LCDs, Fringe analysis, Cameras, 3D metrology, Calibration, Deflectometry

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Proceedings Article | 20 June 2021 Presentation + Paper

Correction of curved screen in deflectometry

Cheng Liu, Zonghua Zhang, Nan Gao, Zhaozong Meng

Proceedings Volume 11786, 117861H (2021) https://doi.org/10.1117/12.2593872

KEYWORDS: Deflectometry, Mirrors, Clouds, Systems modeling, Data processing, Data acquisition, CCD cameras, Artificial intelligence, Aerospace engineering

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SPIE Journal Paper | 17 February 2021 Open Access

Phase measuring deflectometry for obtaining 3D shape of specular surface: a review of the state-of-the-art

Zonghua Zhang, Caixia Chang, Xiaohong Liu, Ziyu Li, Yanqing Shi, Nan Gao, Zhaozong Meng

OE, Vol. 60, Issue 02, 020903, (February 2021) https://doi.org/10.1117/12.10.1117/1.OE.60.2.020903

KEYWORDS: 3D metrology, LCDs, Fringe analysis, Deflectometry, Calibration, Error analysis, Reflectivity, Imaging systems, Cameras, Optical engineering

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Proceedings Article | 10 October 2020 Presentation

Center extraction method of circular coding target based on radial line fitting of coding ring

Nan Gao, Zonghua Zhang, Sen Wang, Zhaozong Meng

Proceedings Volume 11552, 1155205 (2020) https://doi.org/10.1117/12.2573893

KEYWORDS: Cameras, Error analysis, Calibration, 3D acquisition, Feature extraction, Image compression, Device simulation

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Proceedings Article | 10 October 2020 Presentation + Paper

Recent advance on phase measuring deflectometry for obtaining 3D shape of specular surface

Zonghua Zhang, Caixia Chang, Xiaohong Liu, Yuemin Wang, Nan Gao, Zhaozong Meng

Proceedings Volume 11552, 115520Z (2020) https://doi.org/10.1117/12.2572962

KEYWORDS: 3D metrology, Deflectometry, Imaging systems, 3D acquisition, Infrared imaging, Light, Complex systems, Reflectivity, Data processing, Reflection

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Proceedings Article | 10 October 2020 Presentation

High sensitivity fringe projection profilometry combining optimal fringe frequency and optimal fringe direction

Zonghua Zhang, Jin Yu, Nan Gao, Zhaozong Meng

Proceedings Volume 11551, 115510K (2020) https://doi.org/10.1117/12.2572961

KEYWORDS: 3D metrology, Imaging systems, 3D acquisition, Infrared imaging, Light, Complex systems, Reflectivity, Deflectometry, Data processing, Data integration

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Proceedings Article | 18 December 2019 Paper

Three-dimensional shape measurement of specular objects based on infrared phase-measuring deflectometry

Caixia Chang, Zonghua Zhang, Nan Gao, Zhaozong Meng

Proceedings Volume 11338, 113381Y (2019) https://doi.org/10.1117/12.2545605

KEYWORDS: Mirrors, Infrared cameras, Fringe analysis, Glasses, 3D metrology, Cameras, Calibration, Infrared radiation, Projection systems, Deflectometry

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Proceedings Article | 18 November 2019 Paper

High accurate three-dimensional shape measurement of discontinuous specular surfaces by stereo direct phase-measuring deflectometry

Yuemin Wang, Zonghua Zhang, Nan Gao, Zhaozong Meng

Proceedings Volume 11189, 111890Q (2019) https://doi.org/10.1117/12.2537295

KEYWORDS: 3D imaging metrology, Specular reflections, Cameras, LCDs, 3D metrology, Deflectometry, Fringe analysis, Mirrors, Calibration, 3D acquisition, Manufacturing, Reflection

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Proceedings Article | 13 May 2019 Presentation + Paper

Three-dimensional shape measurement of specular object with discontinuous surfaces by direct phase measuring deflectometry

Zonghua Zhang, Nan Gao, Xiaohong Liu

Proceedings Volume 10991, 109910A (2019) https://doi.org/10.1117/12.2506786

KEYWORDS: LCDs, Mirrors, Calibration, Cameras, Fringe analysis, CCD cameras, Imaging systems, 3D metrology, Deflectometry, Distance measurement, 3D imaging metrology

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Proceedings Article | 2 November 2018 Paper

Pose calibration of two cameras with non-overlapped field of view

Sitao Yan, Zonghua Zhang, Nan Gao

Proceedings Volume 10819, 1081919 (2018) https://doi.org/10.1117/12.2326700

KEYWORDS: Cameras, Calibration, Mirrors, Imaging systems, Error analysis, Mirror pointing, Neptunium, Computer vision technology

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SPIE Journal Paper | 27 June 2018

Exponential fringe projection for alleviating phase error caused by gamma distortion based on principal component analysis

Chao Chen, Nan Gao, Xiangjun Wang, Zonghua Zhang

OE, Vol. 57, Issue 06, 064105, (June 2018) https://doi.org/10.1117/12.10.1117/1.OE.57.6.064105

KEYWORDS: Fringe analysis, Principal component analysis, Distortion, Error analysis, Phase shifts, Calibration, Projection systems, 3D metrology, Complex systems, Optical engineering

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Proceedings Article | 12 January 2018 Paper

Three-dimensional fingerprint recognition by using convolution neural network

Qianyu Tian, Nan Gao, Zonghua Zhang

Proceedings Volume 10621, 106210I (2018) https://doi.org/10.1117/12.2294017

KEYWORDS: Fingerprint recognition, Convolution, Feature extraction, Detection and tracking algorithms, Neural networks, Fringe analysis, Databases, 3D image processing, 3D acquisition, Digital Light Processing

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Proceedings Article | 13 June 2017 Paper

Full-field 3D shape measurement of specular object having discontinuous surfaces

Zonghua Zhang, Shujun Huang, Nan Gao, Feng Gao, Xiangqian Jiang

Proceedings Volume 10449, 104490T (2017) https://doi.org/10.1117/12.2270172

KEYWORDS: 3D imaging metrology, Fringe analysis, 3D metrology, Phase measurement, Deflectometry, 3D displays, Calibration, 3D acquisition, Mathematical modeling, 3D modeling, Visual process modeling, Projection systems

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Proceedings Article | 28 February 2017 Paper

Fourier transform profilometry based on mean envelope extraction

Xiaoxuan Zhang, Shujun Huang, Nan Gao, Zonghua Zhang

Proceedings Volume 10256, 1025639 (2017) https://doi.org/10.1117/12.2257801

KEYWORDS: Fourier transforms, Fringe analysis, Optical testing, Phase measurement, Image processing, 3D image processing, Optical filters, Image filtering

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Proceedings Article | 24 November 2016 Paper

Full-field 3D shape measurement of specular surfaces by direct phase to depth relationship

Zonghua Zhang, Yue Liu, Shujun Huang, Zhenqi Niu, Jiao Guo, Nan Gao, Feng Gao, Xiangqian Jiang

Proceedings Volume 10023, 100230X (2016) https://doi.org/10.1117/12.2246144

KEYWORDS: 3D metrology, Fringe analysis, Calibration, CCD cameras, Mathematical modeling, Mirrors, LCDs, Cameras, Beam splitters, Imaging systems

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Proceedings Article | 24 November 2016 Paper

Binocular stereo vision system based on phase matching

Huixian Liu, Shujun Huang, Nan Gao, Zonghua Zhang

Proceedings Volume 10023, 100230S (2016) https://doi.org/10.1117/12.2245853

KEYWORDS: Phase matching, 3D modeling, 3D metrology, Cameras, Stereo vision systems, Calibration, CCD cameras, Fringe analysis, Phase shifts, Imaging systems

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Proceedings Article | 14 November 2016 Paper

Person identification by using 3D palmprint data

Xuefei Bai, Shujun Huang, Nan Gao, Zonghua Zhang

Proceedings Volume 10025, 100250Q (2016) https://doi.org/10.1117/12.2246195

KEYWORDS: 3D metrology, Digital Light Processing, Feature extraction, Biometrics, 3D image processing, Image filtering, Gaussian filters, Databases, Fringe analysis, 3D acquisition

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Proceedings Article | 3 November 2016 Paper

Analytic technology of infrared absorption spectrum based on time-frequency analysis

Xiyang Liu, Nan Gao, Zhenhui Du, Chao Chen, Zonghua Zhang

Proceedings Volume 10030, 1003010 (2016) https://doi.org/10.1117/12.2246338

KEYWORDS: Time-frequency analysis, Infrared technology, Analytical research, Infrared radiation, Absorption, Infrared spectroscopy, Wavelets, Methane, Wavelet transforms, NOx

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Showing 5 of 18 publications

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