Prof. Xiaoli Liu Profile

Prof. Xiaoli Liu

at Shenzhen Univ

SPIE Involvement:

Author

Publications (43)

Proceedings Article | 4 March 2024 Paper

Multi-view 3D reconstruction based on speckle correlation

Xiaoxian Zeng, Yu Jing, Qijian Tang, Xiaoli Liu, Xiang Peng

Proceedings Volume 13070, 130700T (2024) https://doi.org/10.1117/12.3018108

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Proceedings Article | 15 February 2024 Paper

Body measurement based on a multiview structured light 3D imaging system

Meng Wang, Hailong Chen, Qijian Tang, Xiang Peng, Yu Fu, Xiaoli Liu

Proceedings Volume 13069, 1306907 (2024) https://doi.org/10.1117/12.3023318

KEYWORDS: Sensors, 3D metrology, 3D scanning, Point clouds, Stereoscopy, 3D image processing, Imaging systems, Structured light, 3D acquisition, 3D modeling

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Proceedings Article | 15 February 2024 Paper

A calibration method for LED point light sources in near-field photometric stereo

Rongguang Wang, Jing Yu, Xiaojie Zhang, Qijian Tang, Xiaoli Liu

Proceedings Volume 13069, 130690A (2024) https://doi.org/10.1117/12.3023291

KEYWORDS: Calibration, Light sources, Optical spheres, Cameras, Light emitting diodes, Light sources and illumination, Imaging systems, Specular reflections, Near field, Detection and tracking algorithms

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Proceedings Article | 6 November 2023 Paper

Lensless light-field imaging with flexible perspective selection

Chen Mo, Yupei Miao, Xiaojie Zhang, Jiangtao Xi, Jun Tong, Xiaoli Liu

Proceedings Volume 12921, 129210A (2023) https://doi.org/10.1117/12.2687471

KEYWORDS: Point spread functions, Diffusers, Image restoration, Imaging systems, Cameras, 4D image capture, High angular resolution diffusion imaging

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The perspectives of light-field images taken by lens-based light-field camera are fixed due to the fixed position and size of lenslet. Unlike lens-based light-field imaging, lensless light-field imaging technologies encode light-field information of scene through a diffuser, and then reconstruct the light-field images by computational algorithms. In this paper, a commercial holographic diffuser is employed in the lensless light-field imaging system, and a flexible complementary segmentation method of sub-aperture region is proposed for the Point Spread Function (PSF). The surface of the holographic diffuser is composed of relief microstructures, which are pseudo-random and non-periodic. Hence, any region of the holographic diffuser can encode and recover light information of object independently, just like sub-aperture imaging from corresponding perspective. Firstly, the PSF of lensless light-field imaging system is calibrated, and the encoded image of scene is also captured. After that, the PSF is divided into two complementary regions as sub-PSFs, corresponding to different sub-aperture regions. Then sub-aperture images of scene are reconstructed with corresponding sub-PSFs through reconstruction algorithm, achieving light-field image of selected perspective. Properly dividing the sub-PSF and reconstructing sub-aperture image, the sub-aperture image array of light-field can be obtained. With these light-field images, digital refocusing can be achieved finally. Different from existing segmentation method of PSF in lensless light-field imaging, the complementary segmentation method divides PSF into two sub-PSFs while these tow sub-PSFs are complementary to each other. This allows us to arbitrarily select the position and size of sub-PSF flexibly, namely flexible perspective selection. Meanwhile, decreasing the sub-aperture images to be reconstructed in algorithm can reduce error in reconstruction. Experiments show that, the complementary segmentation method can freely select the position and size of sub-aperture region while reducing the reconstruction error of lensless light-field imaging system significantly.

Proceedings Article | 27 January 2023 Paper

Fourier ptychographic microscopy reconstruction with an untrained deep neural network

Li Li, Xianye Li, Jingping Guo, Qijian Tang, Xiaoli Liu, Xiang Peng

Proceedings Volume 12550, 125501Q (2023) https://doi.org/10.1117/12.2667198

KEYWORDS: Neural networks, Deep learning, Reconstruction algorithms, Microscopy, Education and training, Data modeling, Image fusion, Light emitting diodes, Network architectures

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Proceedings Article | 27 January 2023 Paper

Light field camera decoding based on two-plane ray model

Zedong Huang, Yang Yang, Xiaojie Zhang, Yupei Miao, Qijian Tang, Xiaoli Liu

Proceedings Volume 12550, 125501P (2023) https://doi.org/10.1117/12.2667012

KEYWORDS: Cameras, Calibration, Sensors, LCDs, Interpolation, Image sensors

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Proceedings Article | 27 January 2023 Paper

Lensless light field imaging with angular resolution improvement

Chen Mo, Zewei Cai, Jiangtao Xi, Jun Tong, Xiaoli Liu

Proceedings Volume 12550, 125501O (2023) https://doi.org/10.1117/12.2666798

KEYWORDS: Point spread functions, Diffusers, Imaging systems, Reconstruction algorithms, Diffuse optical imaging, Computational imaging, High angular resolution imaging

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Proceedings Article | 18 April 2021 Paper

3D depth sensing of active structured light field based on EPI

Yingsi Lin, Meng Wang, Ziwei Wang, Qijian Tang, Xiaoli Liu

Proceedings Volume 11772, 117720B (2021) https://doi.org/10.1117/12.2592526

KEYWORDS: Active remote sensing, Structured light, Structural sensing, 3D surface sensing, Distortion, Calibration, Sensors, Projection systems, Feature extraction, Digital Light Processing

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Proceedings Article | 10 October 2020 Presentation + Paper

Positional misalignment correction for Fourier ptychographic microscopy based on intensity distribution

Wei Huang, Shuixin Pan, Qi Zhou, Meihua Liao, Chenggong Zhang, Qijian Tang, Xiaoli Liu, Xiang Peng

Proceedings Volume 11549, 115490D (2020) https://doi.org/10.1117/12.2583686

KEYWORDS: Light emitting diodes, Microscopy, Image quality, LED displays, Microscopes

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Proceedings Article | 10 October 2020 Presentation + Paper

Global iterative optimization for Fourier ptychographic microscopy

Qijian Tang, Wei Huang, Chenggong Zhang, Xiaoli Liu, Xiang Peng

Proceedings Volume 11549, 115490E (2020) https://doi.org/10.1117/12.2583941

KEYWORDS: Microscopy, Image resolution, Visualization, Phase imaging, Optical microscopes, Life sciences, Imaging technologies

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Proceedings Article | 17 April 2020 Paper

Real-time point cloud registration for flexible hand-held 3D scanning

Yang Yang, HaiLong Chen, Xiaoli Liu, Qijian Tang, Zewei Cai, Xiang Peng

Proceedings Volume 11455, 114557U (2020) https://doi.org/10.1117/12.2565366

KEYWORDS: Clouds, 3D scanning, Image registration, 3D modeling, Calibration, 3D acquisition, Machine vision, Photogrammetry, Remote sensing, 3D image processing

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Proceedings Article | 12 March 2020 Paper

Improved 3D imaging and measurement with fringe projection structured light field

Xiaojie Zhang, Zewei Cai, Xiaoli Liu, Xiang Peng

Proceedings Volume 11438, 114380X (2020) https://doi.org/10.1117/12.2550218

KEYWORDS: 3D metrology, Imaging systems, Modulation, Projection systems, Structured light, Phase shift keying, 3D modeling

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Proceedings Article | 18 November 2019 Paper

How can a plenoptic camera be used as a metrology tool?

Zewei Cai, Xiaoli Liu, Giancarlo Pedrini, Wolfgang Osten, Xiang Peng

Proceedings Volume 11189, 1118902 (2019) https://doi.org/10.1117/12.2540184

KEYWORDS: Cameras, Metrology, 3D image processing, Calibration, Optical testing, Image sensors, Signal detection, Microlens array, Sensors, Image processing

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Proceedings Article | 16 October 2019 Paper

Automatic phase aberration compensation for digital holographic microscopy based on rotation and transpose

Dingnan Deng, Weijuan Qu, Wenqi He, Xiaoli Liu, Xiang Peng

Proceedings Volume 11205, 1120505 (2019) https://doi.org/10.1117/12.2541687

KEYWORDS: Digital holography, Microscopy, Holography, Numerical analysis, Optical signal processing, Imaging systems, Biomedical optics, Phase measurement, Phase imaging

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Proceedings Article | 3 September 2019 Paper

Using wrapped phases for light-field three-dimensional imaging

Jiawei Chen, Zewei Cai, Xiaoli Liu, Giancarlo Pedrini, Wolfgang Osten, Xiang Peng

Proceedings Volume 11102, 111021C (2019) https://doi.org/10.1117/12.2527850

KEYWORDS: Microlens, 3D image processing, Phase shifts, Cameras, Imaging systems, Calibration, 3D metrology, Modulation, 3D modeling, Computer programming

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Proceedings Article | 21 June 2019 Paper

Light field three-dimensional measurement

Zewei Cai, Xiaoli Liu, Meihua Liao, Wenqi He, Giancarlo Pedrini, Wolfgang Osten, Xiang Peng

Proceedings Volume 11056, 1105628 (2019) https://doi.org/10.1117/12.2526889

KEYWORDS: Calibration, Cameras, 3D metrology, 3D image reconstruction, Imaging systems

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Proceedings Article | 24 July 2018 Paper

An accurate hand-eye calibration algorithm with global optimization

Yaqin Zhang, Xiaoli Liu, Hailong Chen, Zewei Cai, Qijian Tang, Xiang Peng, Menglong Liu, Qingquan Li

Proceedings Volume 10827, 108270Z (2018) https://doi.org/10.1117/12.2500972

KEYWORDS: Calibration, Cameras, 3D metrology, Sensors, 3D acquisition, Optimization (mathematics), Data acquisition, Imaging systems, Error analysis, Robot vision

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Proceedings Article | 24 July 2018 Paper

A method for fast 3D fringe projection measurement without phase unwrapping

Xiaoli Liu, Yang Yang, Qijian Tang, Zewei Cai, Xiang Peng, Menglong Liu, Qingquan Li

Proceedings Volume 10827, 1082713 (2018) https://doi.org/10.1117/12.2501470

KEYWORDS: Cameras, 3D metrology, Phase measurement, Imaging systems, Projection systems, 3D modeling, Calibration, Image processing, Phase shift keying, Phase shifts

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Proceedings Article | 24 July 2018 Paper

A method of vision localization measurement to assist Fourier ptychographic microscopy

Xiaoli Liu, Cheng Li, Qijian Tang, Xiang Peng

Proceedings Volume 10827, 108270J (2018) https://doi.org/10.1117/12.2501042

KEYWORDS: Stereo vision systems, Imaging systems, Microscopy, Image processing, Spatial frequencies, Cameras

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Proceedings Article | 10 February 2017 Paper

Selection of F/number in lattice design for stitching inferferometry of aspheric surface

Junzheng Peng, Xiaoli Liu, Xiang Peng, Yingjie Yu, Xiaoge Li

Proceedings Volume 10250, 1025010 (2017) https://doi.org/10.1117/12.2266725

KEYWORDS: Stitching interferometry, Aspheric lenses

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Proceedings Article | 10 February 2017 Paper

Portable 3D scanning system based on an inertial sensor

Qijian Tang, Xiang Peng, Xiaoli Liu, Zewei Cai

Proceedings Volume 10250, 102502E (2017) https://doi.org/10.1117/12.2267213

KEYWORDS: 3D scanning, Sensors

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Proceedings Article | 10 February 2017 Paper

Comparison of active, passive and adaptive phase error compensation methods using a universal phase error model

Zewei Cai, Xiaoli Liu, Qijian Tang, Xiang Peng, Yongkai Yin

Proceedings Volume 10250, 102502Z (2017) https://doi.org/10.1117/12.2267107

KEYWORDS: Error analysis, Phase shifts, Phase shifting, Calibration

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Proceedings Article | 28 September 2016 Paper

An automatic registration system of multi-view 3D measurement data using two-axis turntables

Dong He, Xiaoli Liu, Zewei Cai, Hailong Chen, Xiang Peng

Proceedings Volume 9971, 99712H (2016) https://doi.org/10.1117/12.2237860

KEYWORDS: Structured light, Calibration, Image registration, 3D metrology, 3D modeling, 3D image processing, Optical spheres, Cameras, Clouds, Imaging systems

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Proceedings Article | 1 May 2014 Paper

Phase aided 3D imaging and modeling: dedicated systems and case studies

Yongkai Yin, Dong He, Zeyi Liu, Xiaoli Liu, Xiang Peng

Proceedings Volume 9132, 91320Q (2014) https://doi.org/10.1117/12.2051850

KEYWORDS: Imaging systems, 3D image processing, 3D metrology, 3D modeling, Calibration, Cameras, 3D acquisition, Systems modeling, Stereoscopy, Prototyping

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Proceedings Article | 1 May 2014 Paper

Ray-based calibration for the micro optical metrology system

Yongkai Yin, Meng Wang, Ameng Li, Xiaoli Liu, Xiang Peng

Proceedings Volume 9132, 91320K (2014) https://doi.org/10.1117/12.2051918

KEYWORDS: Calibration, 3D modeling, Imaging systems, 3D metrology, 3D image processing, Stereoscopy, Systems modeling, Microscopy, Optical metrology, Distortion

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Proceedings Article | 19 December 2013 Paper

Texture blending on 3D models using casual images

Xingming Liu, Xiaoli Liu, Ameng Li, Junyao Liu, Huijing Wang

Proceedings Volume 9046, 90460E (2013) https://doi.org/10.1117/12.2036405

KEYWORDS: 3D modeling, Cameras, 3D image processing, Calibration, Image registration, Imaging systems, Volume rendering, Systems modeling, Light sources and illumination, 3D acquisition

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Proceedings Article | 26 September 2013 Paper

Real-time 3D imaging by using color structured light based on Hilbert transform

Jiping Guo, Xiang Peng, Jiping Yu, Xiaoli Liu, Ameng Li, Meng Wang

Proceedings Volume 8856, 885624 (2013) https://doi.org/10.1117/12.2022689

KEYWORDS: Stereoscopy, 3D image processing, Data acquisition, Fringe analysis, Phase shifting, Demodulation, Fourier transforms, 3D acquisition, Real time imaging, Structured light

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Proceedings Article | 20 November 2012 Paper

A method for phase unwrapping base digital spackle correlation

Dong He, Ameng Li, Xiaoli Liu, Xiang Peng

Proceedings Volume 8563, 856317 (2012) https://doi.org/10.1117/12.999965

KEYWORDS: Cameras, Speckle pattern, 3D metrology, Speckle, Phase shifts, Projection systems, Calibration, Imaging systems, Computing systems, 3D modeling

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Proceedings Article | 15 October 2012 Paper

Center location of circular targets with surface fitting method

Yongkai Yin, Meng Wang, Xiaoli Liu, Xiang Peng

Proceedings Volume 8499, 84991U (2012) https://doi.org/10.1117/12.929246

KEYWORDS: Gaussian filters, Computer simulations, Detection and tracking algorithms, Machine vision, Edge detection, Image filtering, Digital image processing, 3D modeling, Signal to noise ratio, Optoelectronics

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Proceedings Article | 15 October 2012 Paper

Correction of circular center deviation in perspective projection

Dong He, Xiaoli Liu, Yongkai Yin, Ameng Li, Xiang Peng

Proceedings Volume 8499, 84991V (2012) https://doi.org/10.1117/12.928171

KEYWORDS: Cameras, Image processing, Error analysis, Digital image processing, Imaging systems, Machine vision, Device simulation, Signal to noise ratio, Current controlled current source, Computer simulations

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Proceedings Article | 15 October 2012 Paper

Two-factor authentication system based on optical interference and one-way hash function

Wenqi He, Xiang Peng, Xiangfeng Meng, Xiaoli Liu

Proceedings Volume 8499, 849909 (2012) https://doi.org/10.1117/12.928458

KEYWORDS: Image encryption, Image processing, Computer simulations, Neodymium, Databases, Phase retrieval, Spatial light modulators, Diffraction, Optoelectronics, Modulation

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Proceedings Article | 15 October 2012 Paper

Automatic registration of range images combined with the system calibration and global ICP

Xiaoli Liu, Xinhua He, Zeyi Liu, Dong He, Ameng Li, Wenqi He, Xiang Peng

Proceedings Volume 8499, 84991X (2012) https://doi.org/10.1117/12.929733

KEYWORDS: Sensors, Calibration, Image registration, 3D metrology, 3D image processing, Range image registration, Optical testing, Image processing, Charge-coupled devices, Sensor calibration

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Proceedings Article | 13 September 2012 Paper

A modified phase unwrapping algorithm based on phase filtering

Hailong Chen, Xiaoli Liu, Yabin Ding, Xiang Peng

Proceedings Volume 8494, 84940P (2012) https://doi.org/10.1117/12.945218

KEYWORDS: Digital filtering, Fringe analysis, Projection systems, Phase shifting, Image filtering, Spatial frequencies, Cameras, Error analysis, Demodulation, Phase shift keying

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Proceedings Article | 24 September 2011 Paper

A new planar pattern for camera calibration

Xiaoli Liu, Dong He, Yongkai Yin, Chenggong Zhang, Xiang Peng

Proceedings Volume 8135, 81351H (2011) https://doi.org/10.1117/12.892901

KEYWORDS: Calibration, Cameras, 3D image processing, 3D acquisition, Distortion, Imaging systems, 3D metrology, 3D modeling, Projection systems, Image processing

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Proceedings Article | 10 September 2011 Paper

Phase reconstruction method using frequency shifting

Chenggong Zhang, Yingjian Guan, Xiaoli Liu, Hailong Chen, Xiang Peng

Proceedings Volume 8133, 813306 (2011) https://doi.org/10.1117/12.892992

KEYWORDS: Phase measurement, Reconstruction algorithms, Fringe analysis, Computer simulations, Phase shifts, Phase shift keying, Precision measurement, Projection systems, Cameras, Commercial off the shelf technology

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Proceedings Article | 11 November 2010 Paper

Calibration target reconstruction for 3-D vision inspection system of large-scale engineering objects

Yongkai Yin, Xiang Peng, Yingjian Guan, Xiaoli Liu, Ameng Li

Proceedings Volume 7855, 78550V (2010) https://doi.org/10.1117/12.870287

KEYWORDS: Calibration, Cameras, 3D vision, Inspection, 3D acquisition, 3D metrology, Systems engineering, Image analysis, Imaging systems, 3D modeling

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Proceedings Article | 11 November 2010 Paper

3D photorealistic model with texture blending

Xingming Liu, Xiang Peng, Ameng Li, Yingjian Guan, Xiaoli Liu

Proceedings Volume 7850, 78502D (2010) https://doi.org/10.1117/12.870545

KEYWORDS: 3D modeling, RGB color model, 3D image processing, Content addressable memory, 3D acquisition, Volume rendering, Cameras, Electroluminescence, Fringe analysis, Instrument modeling

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Proceedings Article | 8 September 2010 Paper

Error analysis of two methods for range-images registration

Xiaoli Liu, Yongkai Yin, Ameng Li, Dong He, Xiang Peng

Proceedings Volume 7799, 77990S (2010) https://doi.org/10.1117/12.860005

KEYWORDS: Image registration, Error analysis, Optimization (mathematics), Range image registration, Metrology, 3D metrology, Detection and tracking algorithms, Optoelectronics, 3D image processing, 3D modeling

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Proceedings Article | 8 September 2010 Paper

Center location error correction of circular targets

Yongkai Yin, Xiaoli Liu, Ameng Li, Chenggong Zhang, Dong He, Xiang Peng

Proceedings Volume 7798, 779824 (2010) https://doi.org/10.1117/12.860017

KEYWORDS: Error analysis, Cameras, Photogrammetry, Imaging systems, Calibration, Detection and tracking algorithms, Reconstruction algorithms, Lawrencium, 3D modeling, Optoelectronics

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Proceedings Article | 7 July 2009 Paper

2.5D virtual reality visualisation of shearography strain data from a canvas painting

R. Groves, A. Li, X. Liu, S. Hackney, X. Peng, W. Osten

Proceedings Volume 7391, 739109 (2009) https://doi.org/10.1117/12.827519

KEYWORDS: Shearography, Virtual reality, Volume rendering, Visualization, Interferometers, Image processing, Diagnostics, Photography, Mirrors, CCD cameras

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Proceedings Article | 28 November 2007 Paper

A coarse registration method of range image based on SIFT

Xiaoli Liu, Xiang Peng, Yongkai Yin, Jindong Tian, Ameng Li, Xiaobo Zhao

Proceedings Volume 6833, 68330X (2007) https://doi.org/10.1117/12.756264

KEYWORDS: Image registration, 3D modeling, Image restoration, 3D image processing, Fringe analysis, Image scaling, Reverse modeling, Cameras, Image acquisition, Range image registration

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Proceedings Article | 24 September 2007 Paper

The new methods for registration and integration of range images

Xiaoli Liu, Ameng Li, Pengdong Gao, Jindong Tian, Xiang Peng

Proceedings Volume 6696, 66961Y (2007) https://doi.org/10.1117/12.733658

KEYWORDS: Image registration, 3D modeling, 3D image processing, Image processing, Integrated modeling, 3D metrology, Cameras, Image acquisition, Optical metrology, Range image registration

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Proceedings Article | 14 September 2007 Paper

Three-dimensional imaging with acousto-optic fringe projector and piecewise temporal phase unwrapping

Jindong Tian, Xiaobo Zhao, Xiaoli Liu, Xiang Peng

Proceedings Volume 6671, 66711B (2007) https://doi.org/10.1117/12.733621

KEYWORDS: Spatial frequencies, Stereoscopy, Fringe analysis, 3D image processing, Acousto-optics, Projection systems, Algorithm development, Reconstruction algorithms, Tolerancing, Imaging systems

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Showing 5 of 43 publications

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