Dr. Yuankun Liu Profile

Dr. Yuankun Liu

at Sichuan Univ

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Author

Publications (13)

Proceedings Article | 6 November 2023 Paper

Gamma rectification solutions based on probability density function

Xin Yu, Yuankun Liu, Wenjing Chen

Proceedings Volume 12921, 129210U (2023) https://doi.org/10.1117/12.2688052

KEYWORDS: Fringe analysis, Phase shifts, Phase measurement, Computer simulations, Projection systems, Phase unwrapping, Phase distribution, Light sources and illumination, Gamma correction, Cameras

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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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Proceedings Article | 13 June 2017 Paper

Camera calibration based on virtual planar targets

Zhentao Lin, Qican Zhang, Yuankun Liu, Hui Pan

Proceedings Volume 10449, 104492L (2017) https://doi.org/10.1117/12.2270885

KEYWORDS: Cameras, Calibration, 3D metrology, Machine vision, Imaging systems, 3D image processing, Precision calibration

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Proceedings Article | 7 August 2015 Paper

Three-dimensional shape measurement of small object based on tri-frequency heterodyne method

Shouqi Liu, Wei Feng, Qican Zhang, Yuankun Liu

Proceedings Volume 9623, 96231C (2015) https://doi.org/10.1117/12.2193484

KEYWORDS: 3D metrology, Heterodyning, Fringe analysis, CCD cameras, Imaging systems, Digital micromirror devices, Projection systems, Reliability, Information technology, Structured light

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SPIE Journal Paper | 27 May 2015

Temporal-spatial encoding binary fringes toward three-dimensional shape measurement without projector nonlinearity

Jiangping Zhu, Xianyu Su, Zhisheng You, Yuankun Liu

OE, Vol. 54, Issue 05, 054108, (May 2015) https://doi.org/10.1117/12.10.1117/1.OE.54.5.054108

KEYWORDS: Binary data, Computer programming, Fringe analysis, Projection systems, 3D metrology, Quantization, Optical engineering, 3D image processing, Phase shifts, Diffusion

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Proceedings Article | 4 March 2015 Paper

A novel one-dimensional phase-shift technique by using crossed fringe for phase measuring deflectometry

Yuankun Liu, Evelyn Olesch, Zheng Yang, Gerd Häusler, Xianyu Su

Proceedings Volume 9302, 93020X (2015) https://doi.org/10.1117/12.2087101

KEYWORDS: Fringe analysis, Phase shifts, Phase shift keying, Deflectometry, 3D metrology, Modulation, Mirrors, Imaging systems, Mechanics, Projection systems

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Proceedings Article | 2 June 2014 Paper

Shape measurement and vibration analysis of moving speaker cone

Qican Zhang, Yuankun Liu, Petri Lehtonen

Proceedings Volume 9234, 92340T (2014) https://doi.org/10.1117/12.2054026

KEYWORDS: Distortion, Shape analysis, Fringe analysis, Vibrometry, Cameras, Fourier transforms, 3D image processing, Data processing, Projection systems, Image resolution

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Proceedings Article | 3 August 2010 Paper

A compact LED-based phase measuring deflectometry setup

Petri Lehtonen, Yuankun Liu

Proceedings Volume 7790, 77900C (2010) https://doi.org/10.1117/12.860484

KEYWORDS: Fringe analysis, Light emitting diodes, Deflectometry, Phase shifts, Photography, LED lighting, Diffusers, Beam splitters, LED displays, Reflection

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SPIE Journal Paper | 1 October 2009

Testing an aspheric mirror based on phase measuring deflectometry

Wenchuan Zhao, Xianyu Su, Yuankun Liu, Qican Zhang

OE, Vol. 48, Issue 10, 103603, (October 2009) https://doi.org/10.1117/12.10.1117/1.3250241

KEYWORDS: Mirrors, LCDs, Fringe analysis, Deflectometry, Cameras, Aspheric optics, Phase shifts, Calibration, Optical engineering, Aspheric lenses

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Proceedings Article | 20 May 2009 Paper

Study on bi-color phase measurement deflectometry

Yuankun Liu, Xianyu Su, Qican Zhang

Proceedings Volume 7283, 728349 (2009) https://doi.org/10.1117/12.828819

KEYWORDS: Fringe analysis, Deflectometry, Phase measurement, Cameras, RGB color model, Reflection, Optical testing, Mirrors, Image resolution, CCD cameras

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Proceedings Article | 17 January 2008 Paper

Wavefront measurement based on active deflectometry

Yuankun Liu, Xianyu Su, Qican Zhang

Proceedings Volume 6723, 67232N (2008) https://doi.org/10.1117/12.783323

KEYWORDS: Wavefronts, CCD cameras, Fringe analysis, Deflectometry, Phase measurement, Calibration, Imaging systems, Cameras, Phase shift keying, Flat panel displays

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Proceedings Article | 27 November 2007 Paper

Dynamic deformation measurement and analysis of active stressed lap using optical method

Qican Zhang, Xianyu Su, Yuankun Liu, Liqun Xiang

Proceedings Volume 6723, 67232O (2007) https://doi.org/10.1117/12.783324

KEYWORDS: Polishing, Fringe analysis, Active optics, Mirrors, Iron, Aspheric lenses, Optics manufacturing, Sensors, Deflectometry, Heart

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Proceedings Article | 17 April 2001 Paper

Multipoint velocity interferometer system for any reflector and its applications

ZeRen Li, Ruchao Ma, Guanghua Chen, Yuankun Liu, Jun Liu, Jianquan Yao

Proceedings Volume 4183, (2001) https://doi.org/10.1117/12.424288

KEYWORDS: Sensors, Velocity measurements, Optical fibers, Interferometers, Reflectors, Signal detection, Explosives, Target detection, Temporal resolution, Doppler effect

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Showing 5 of 13 publications

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