Prof. Yiping Cao Profile

Prof. Yiping Cao

at Sichuan Univ

SPIE Involvement:

Author

Publications (40)

SPIE Journal Paper | 5 January 2024

Spatial phase unwrapping algorithm based on multi-anchors bidirectional location and suppression

Ying Zhang, Yiping Cao, Haitao Wu, Chengmeng Li

OE, Vol. 63, Issue 01, 014101, (January 2024) https://doi.org/10.1117/12.10.1117/1.OE.63.1.014101

KEYWORDS: Phase unwrapping, Reconstruction algorithms, Reliability, Optical engineering, Shadows, Algorithm development, Phase shifts, Cross validation, Phase measurement, 3D metrology

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Proceedings Article | 24 November 2023 Paper

Erosion-clustering connected domain segmentation algorithm for phase error compensation

Haitao Wu, Yiping Cao

Proceedings Volume 12935, 1293502 (2023) https://doi.org/10.1117/12.2691226

KEYWORDS: Corrosion, Phase unwrapping, Detection and tracking algorithms, Error analysis

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SPIE Journal Paper | 20 July 2023

Double-shot N-step phase measuring profilometry

Cai Xu, Yiping Cao, Haitao Wu, Hechen Zhang

OE, Vol. 62, Issue 07, 074103, (July 2023) https://doi.org/10.1117/12.10.1117/1.OE.62.7.074103

KEYWORDS: Deformation, Phase shifts, Phase measurement, Aliasing, Fringe analysis, Time division multiplexing, Optical engineering, Double patterning technology, Optical gratings, 3D metrology

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SPIE Journal Paper | 28 January 2023

Generalized fringe order correction based on phase shift segmentation for absolute phase retrieval

Haihua An, Yiping Cao

OE, Vol. 62, Issue 01, 014107, (January 2023) https://doi.org/10.1117/12.10.1117/1.OE.62.1.014107

KEYWORDS: Phase shifts, Phase retrieval, Phase unwrapping, Discontinuities, Tunable filters, Optical engineering, Digital filtering, Error analysis, Cameras, Projection systems

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Proceedings Article | 15 December 2022 Paper

Absolute phase retrieval based on the sinusoidal codewords

Haihua An, Yiping Cao

Proceedings Volume 12478, 1247815 (2022) https://doi.org/10.1117/12.2652179

KEYWORDS: Phase shifts, Phase retrieval, Fringe analysis, 3D image reconstruction

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SPIE Journal Paper | 14 April 2022

Single-shot N-step phase measurement profilometry

Na Yang, Yiping Cao, Haihua An, Zidong Han, Haitao Wu

OE, Vol. 61, Issue 04, 044105, (April 2022) https://doi.org/10.1117/12.10.1117/1.OE.61.4.044105

KEYWORDS: Phase shifts, 3D metrology, Phase measurement, Modulation, Video, Fringe analysis, Optical engineering, Data processing, Optical filters, Reflectivity

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SPIE Journal Paper | 11 April 2022

Curtain-type phase unwrapping algorithm

Cai Xu, Yiping Cao, Haitao Wu, Hongmei Li, Hechen Zhang, Haihua An

OE, Vol. 61, Issue 04, 044103, (April 2022) https://doi.org/10.1117/12.10.1117/1.OE.61.4.044103

KEYWORDS: Phase shift keying, Diamond, Diffusion, Optical engineering, Modulation, 3D metrology, Curtains, Video, Phase shifts, Video processing

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SPIE Journal Paper | 1 July 2021

Fast and robust online three-dimensional measurement based on feature correspondence

Haitao Wu, Yiping Cao, Haihua An, Yang Li, Hongmei Li, Cai Xu

OE, Vol. 60, Issue 07, 074101, (July 2021) https://doi.org/10.1117/12.10.1117/1.OE.60.7.074101

KEYWORDS: 3D metrology, Modulation, Frequency modulation, Fermium, 3D modeling, Optical engineering, Reconstruction algorithms, Phase shifts, Phase shift keying, Fringe analysis

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SPIE Journal Paper | 29 March 2021

Color-coded computer-generated Moiré profilometry with real-time 3D measurement and synchronous monitoring video collection

Hechen Zhang, Yiping Cao, Chengmeng Li, Lu Wang, Hongmei Li, Cai Xu, Yingying Wan

OE, Vol. 60, Issue 03, 034109, (March 2021) https://doi.org/10.1117/12.10.1117/1.OE.60.3.034109

KEYWORDS: Video, 3D metrology, Composites, RGB color model, 3D modeling, Optical engineering, CCD cameras, Fluctuations and noise, Cameras, Phase shifts

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SPIE Journal Paper | 23 December 2020

Improved 2 + 1 phase-shifting algorithm for suppressing ambient light influence

Haitao Wu, Yiping Cao, Haihua An, Hechen Zhang, Yujiao Zhang, Na Yang

OE, Vol. 59, Issue 12, 124107, (December 2020) https://doi.org/10.1117/12.10.1117/1.OE.59.12.124107

KEYWORDS: Phase shifts, Reconstruction algorithms, 3D metrology, 3D image processing, Digital Light Processing, Calibration, Lithium, Optical engineering, Fringe analysis, Cameras

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SPIE Journal Paper | 3 March 2020

Real-time computer-generated moiré profilometry with adaptive filtering algorithm

Chengmeng Li, Yiping Cao, Lu Wang, Yingying Wan, Yapin Wang

OE, Vol. 59, Issue 03, 034102, (March 2020) https://doi.org/10.1117/12.10.1117/1.OE.59.3.034102

KEYWORDS: Digital filtering, Video, 3D metrology, Fringe analysis, Optical engineering, Moire patterns, Lithium, Cameras, CCD cameras, Linear filtering

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SPIE Journal Paper | 15 April 2019

Real-time three-dimensional shape measurement based on color binary fringe projection

Guangkai Fu, Yiping Cao, Yapin Wang, Yingying Wan, Lu Wang, Chengmeng Li

OE, Vol. 58, Issue 04, 044102, (April 2019) https://doi.org/10.1117/12.10.1117/1.OE.58.4.044102

KEYWORDS: Binary data, Fringe analysis, 3D metrology, Composites, 3D modeling, Phase shifts, Fluctuations and noise, CCD cameras, Projection systems, Optical engineering

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Proceedings Article | 16 August 2017 Open Access

Exploration on the matching between Optical Comprehensive Design Experiment and Washington Accord

Yiping Cao, Wenjing Chen, Qican Zhang, Yuankun Liu, Dahai Li, Xinzhi Zhou, Jun Wei

Proceedings Volume 10452, 104526P (2017) https://doi.org/10.1117/12.2269997

KEYWORDS: Optical design, Engineering education, Analytical research, Optical tracking, Analog electronics, Digital electronics, Software, Refractive index

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Common problems faced in optical comprehensive design experiment and going against the Washington Accord are pointed out. For resolving these problems, an instructional and innovative teaching scheme for Optics Comprehensive Design Experiment is proposed. We would like to understand the student that can improve the hands-on practical ability, theory knowledge understanding ability, complex problem solving ability, engineering application ability, cooperative ability after tracking and researching the student who have attended the class about Optical Comprehensive Design Experiment, We found that there are some problems on the course such as the experiment content vague, the student beginning less time, phase separation theory and engineering application, the experiment content lack of selectivity and so on. So we have made some improvements reference to the Washington Accord for the class teaching plan about Optical Comprehensive Design Experiment. This class must relevant to the engineering basic courses, professional foundation course and the major courses, so far as to the future study and work that which can play a role in inheriting and continuity to the students. The Optical Comprehensive Design Experiment teaching program requires students learning this course to have learnt basic courses like analog electronics technique, digital electronic technique, applied optics and computer and other related courses which students are required to comprehensively utilize. This teaching scheme contains six practical complex engineering problems which are respectively optical system design, light energy meter design, illuminometer design, material refractive index measuring system design, light intensity measuring system design and open design. Establishing the optional experiment and open experiment can provide students with a greater choice and enhance the students' creativity, vivid teaching experimental teachers and enriching contents of experiment can make the experiment more interesting, providing students with more opportunities to conduct experiment and improving students' practical ability with long learning time, putting emphasis on student's understanding of complex engineering problems and the cognitive of the process to solve complex engineering problems with actual engineering problems. Applying the scheme in other courses and improving accordingly will be able to ensure the quality of engineering education. Look forward to offering useful reference for the curriculum system construction in colleges and universities.

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SPIE Journal Paper | 21 March 2017

Improved Fourier transform phase measurement method for measuring the quality parameters of an image intensifier

Song Sun, Yiping Cao, Yapin Wang, Cheng Chen, Guangkai Fu, Xingfen Xu

OE, Vol. 56, Issue 03, 034113, (March 2017) https://doi.org/10.1117/12.10.1117/1.OE.56.3.034113

KEYWORDS: Image intensifiers, Distortion, Fourier transforms, Image quality, Phase measurement, Optical design, CCD cameras, Optical filters, Spatial light modulators, Sun

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SPIE Journal Paper | 7 March 2016

Grayscale imbalance correcting method based on fringe normalization in RGB tricolor real-time three-dimensional measurement

Meixue Ma, Yiping Cao, Dawu He, Cheng Chen, Yingying Wan

OE, Vol. 55, Issue 03, 034102, (March 2016) https://doi.org/10.1117/12.10.1117/1.OE.55.3.034102

KEYWORDS: Phase shifts, Cameras, RGB color model, Fringe analysis, Digital Light Processing, 3D metrology, Video, Projection systems, High speed cameras, Optical engineering

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SPIE Journal Paper | 11 November 2015

Online phase measuring profilometry for rectilinear moving object by image correction

Han Yuan, Yi-Ping Cao, Chen Chen, Ya-Pin Wang

OE, Vol. 54, Issue 11, 113104, (November 2015) https://doi.org/10.1117/12.10.1117/1.OE.54.11.113104

KEYWORDS: CCD cameras, Digital Light Processing, Optical engineering, 3D image processing, Reconstruction algorithms, 3D image reconstruction, Diodes, Phase measurement, Cameras, Phase shifts

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Proceedings Article | 17 July 2015 Paper

Phase shift reflectometry for wafer inspection

Kuang Peng, Yiping Cao, Hongru Li, Jianfei Sun, Thomas Bourgade, Anand Krishna Asundi

Proceedings Volume 9524, 95242T (2015) https://doi.org/10.1117/12.2190644

KEYWORDS: Semiconducting wafers, Reflectometry, Wafer inspection, Phase shifts, Calibration, 3D metrology, Cameras, Inspection, Imaging systems, Beam splitters

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SPIE Journal Paper | 25 November 2014

On-line phase measuring profilometry for a rotating object

Peng Wang, Yiping Cao, Xin Yang, Kuang Peng

OE, Vol. 53, Issue 11, 114112, (November 2014) https://doi.org/10.1117/12.10.1117/1.OE.53.11.114112

KEYWORDS: Phase shifts, Phase shifting, Optical design, Inspection, Transmittance, Digital Light Processing, CCD cameras, Optical engineering, Charge-coupled devices, Image processing

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SPIE Journal Paper | 7 May 2013

Single orthogonal sinusoidal grating for gamma correction in digital projection phase measuring profilometry

Yanshan Xiao, Yiping Cao, Yingchun Wu, Shunping Shi

OE, Vol. 52, Issue 05, 053605, (May 2013) https://doi.org/10.1117/12.10.1117/1.OE.52.5.053605

KEYWORDS: Fringe analysis, Phase shifts, Projection systems, CCD cameras, Lithium, Optical engineering, 3D metrology, Digital Light Processing, 3D modeling, Imaging systems

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SPIE Journal Paper | 1 July 2010

Three-dimensional measurement method with orthogonal composite grating aided by fringe contrast and background calibration

Yuhang He, Yiping Cao

OE, Vol. 49, Issue 07, 073603, (July 2010) https://doi.org/10.1117/12.10.1117/1.3467449

KEYWORDS: Composites, 3D metrology, Phase shifts, Calibration, Modulation, Optical engineering, Reflectivity, Optical filters, 3D image processing, Spatial filters

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Proceedings Article | 15 April 2010 Paper

Inner crack reconstruction and mechanical analysis for rock-specimen-based phase measuring profilometry

Yiping Cao, Yuhang He

Proceedings Volume 7522, 75225A (2010) https://doi.org/10.1117/12.851684

KEYWORDS: Binary data, Charge-coupled devices, Image processing, Phase measurement, 3D image processing, Data processing, 3D metrology, 3D image reconstruction, Algorithm development, Precision measurement

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Proceedings Article | 29 October 2009 Paper

Profile analysis of ventricle specimen based on a new phase measuring method

Yiping Cao, Xianyu Su, Wenjing Chen, Liqun Xiang, Qichan Zhang, Yuankun Liu

Proceedings Volume 7519, 751918 (2009) https://doi.org/10.1117/12.843234

KEYWORDS: 3D metrology, Phase shifts, Heart, 3D image processing, Surgery, Phase shifting, Charge-coupled devices, Diagnostics, Biology, Medicine

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Proceedings Article | 20 January 2006 Paper

Fourier transform profilometry based on a fringe pattern with two frequency components

Wenjing Chen, Xianyu Su, Yipping Cao, Liqun Xiang, Qican Zhang

Proceedings Volume 6027, 60271I (2006) https://doi.org/10.1117/12.667958

KEYWORDS: Fringe analysis, Fourier transforms, CCD cameras, Laser optics, Spherical lenses, 3D metrology, Projection systems, Cameras, 3D modeling, Phase modulation

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Proceedings Article | 20 January 2006 Paper

Study on Fourier transforms profilometry based on bi-color projecting

Wenjin Chen, Xianyu Su, Yiping Cao, Qiancan Zhang, Liqun Xiang

Proceedings Volume 6027, 602715 (2006) https://doi.org/10.1117/12.667936

KEYWORDS: Fringe analysis, Fourier transforms, Binary data, Modulation, Calibration, Phase shift keying, Projection systems, Digital cameras, 3D metrology, Structured light

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SPIE Journal Paper | 1 November 2005

Optical 3-D shape and deformation measurement of rotating blades using stroboscopic structured illumination

Qican Zhang, Xianyu Su, Yiping Cao, Yong Li, Liqun Xiang, Wenjing Chen

OE, Vol. 44, Issue 11, 113601, (November 2005) https://doi.org/10.1117/12.10.1117/1.2127927

KEYWORDS: 3D metrology, Fringe analysis, Fluctuations and noise, 3D image processing, CCD cameras, Motion measurement, Optical engineering, Fourier transforms, Imaging systems, Charge-coupled devices

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Proceedings Article | 12 April 2005 Paper

Three-dimensional shape visualization of balloon hull in quick deflation

Qican Zhang, Xianyu Su, Liqun Xiang, Yiping Cao, Wenjing Chen

Proceedings Volume 5852, (2005) https://doi.org/10.1117/12.621930

KEYWORDS: 3D metrology, Fourier transforms, Fringe analysis, CCD cameras, 3D image processing, Visualization, Projection systems, Data processing, Imaging systems, Cameras

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Proceedings Article | 12 April 2005 Paper

A stroboscopic structured illumination system used in dynamic 3D visualization of high-speed motion object

Xianyu Su, Qican Zhang, Yong Li, Liqun Xiang, Yiping Cao, Wenjing Chen

Proceedings Volume 5852, (2005) https://doi.org/10.1117/12.621922

KEYWORDS: 3D metrology, Motion measurement, Fluctuations and noise, Fringe analysis, Sensors, Light emitting diodes, 3D visualizations, Dynamical systems, Signal detection, Data processing

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Proceedings Article | 12 April 2005 Paper

Numerical simulation effect of DMD spatio-temporal characteristic on phase measuring profilometry

Yiping Cao, Xianyu Su, Liqun Xiang, Wenjing Chen, Qican Zhang

Proceedings Volume 5852, (2005) https://doi.org/10.1117/12.621466

KEYWORDS: Digital micromirror devices, Charge-coupled devices, Technetium, Fringe analysis, Digital Light Processing, Numerical simulations, Micromirrors, Structural sensing, Computer simulations, Phase shifting

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SPIE Journal Paper | 1 March 2004

Phase-height mapping and coordinate calibration simultaneously in phase-measuring profilometry

Xianyu Su, Wanzhong Song, Yiping Cao, Liqun Xiang

OE, Vol. 43, Issue 03, (March 2004) https://doi.org/10.1117/12.10.1117/1.1646178

KEYWORDS: Calibration, Cameras, Charge-coupled devices, Phase shift keying, Projection systems, Ray tracing, Image segmentation, Optical engineering, Optoelectronics, 3D image processing

SPIE Journal Paper | 1 January 2004

Improving Fourier transform profilometry based on bicolor fringe pattern

Wenjing Chen, Xianyu Su, Yiping Cao, Liqun Xiang

OE, Vol. 43, Issue 01, (January 2004) https://doi.org/10.1117/12.10.1117/1.1630314

KEYWORDS: Fringe analysis, Fourier transforms, Digital cameras, Calibration, Projection systems, Optical engineering, RGB color model, Digital imaging, Computer simulations, 3D metrology