Dr. Qian Kemao Profile

Dr. Qian Kemao

Associate Professor at Nanyang Technological Univ

SPIE Involvement:

Publications (35)

SPIE Journal Paper | 22 October 2018

Sampling moiré as a special windowed Fourier ridges algorithm in demodulation of carrier fringe patterns

Qian Kemao, Nimisha Agarwal, Shien Ri, Qinghua Wang

OE Vol. 57 Issue 10

KEYWORDS: Fringe analysis, Demodulation, Detection and tracking algorithms, Algorithms, Fourier transforms, Picosecond phenomena, Phase shifts, Error analysis, Optical engineering, Algorithm development

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SPIE Journal Paper | 24 August 2017

Windowed Fourier ridges as a spatial carrier phase-shifting algorithm

Nimisha Agarwal, Qian Kemao

OE Vol. 56 Issue 08

KEYWORDS: Phase shifts, Fringe analysis, Error analysis, Fourier transforms, Algorithm development, Optical engineering, Computer science, Computer engineering, Phase retrieval, Denoising

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Proceedings Article | 26 June 2017 Paper

Phase retrieval for high-speed 3D measurement using binary patterns with projector defocusing

Dongliang Zheng, Qian Kemao, Feipeng Da, Hock Soon Seah

Proc. SPIE. 10329, Optical Measurement Systems for Industrial Inspection X

KEYWORDS: Fluctuations and noise, Phase retrieval, Gaussian filters, 3D metrology, Projection systems, Phase measurement, Phase shifts

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Proceedings Article | 13 June 2017 Paper

Comparison between ternary and binary Gray-code-based phase unwrapping methods

Dongliang Zheng, Qian Kemao, Feipeng Da, Hock Soon Seah

Proc. SPIE. 10449, Fifth International Conference on Optical and Photonics Engineering

KEYWORDS: Fringe analysis, 3D metrology, Projection systems, Phase measurement, 3D scanning, Phase shifts

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Proceedings Article | 13 June 2017 Paper

A review of sensing technologies for small and large-scale touch panels

Humza Akhtar, Qian Kemao, Ramakrishna Kakarala

Proc. SPIE. 10449, Fifth International Conference on Optical and Photonics Engineering

KEYWORDS: Sensors, Matrices, Image processing, Image sensors, Signal processing, Reconstruction algorithms, Binary data

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Proceedings Article | 10 February 2017 Paper

Application of EMD in fringe analysis: new developments

Chenxing Wang, Qian Kemao, Feipeng Da, Shaoyan Gai

Proc. SPIE. 10250, International Conference on Optical and Photonics Engineering (icOPEN 2016)

KEYWORDS: Fringe analysis

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Proceedings Article | 17 July 2015 Paper

WFF-BM3D: a hybrid denoising scheme for fringe patterns

Ming Zhao, Kemao Qian

Proc. SPIE. 9524, International Conference on Optical and Photonic Engineering (icOPEN 2015)

KEYWORDS: Optical filters, Fringe analysis, Digital filtering, Denoising, Fourier transforms, 3D metrology, Image filtering, Optical interferometry, Image denoising, 3D image processing

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Proceedings Article | 4 March 2015 Paper

A comparison study of denoising techniques in fringe pattern analysis

Ming Zhao, Kemao Qian

Proc. SPIE. 9302, International Conference on Experimental Mechanics 2014

KEYWORDS: Optical filters, Fringe analysis, Image processing, Digital filtering, Denoising, Precision measurement, Image filtering, Optical interferometry, Filtering (signal processing), 3D image processing

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Proceedings Article | 4 March 2015 Paper

iFringe: a fringe analysis application for mobile smart devices

Jacob Chan, Josias Teo, Kemao Qian

Proc. SPIE. 9302, International Conference on Experimental Mechanics 2014

KEYWORDS: Mobile devices, Human-machine interfaces, Fringe analysis, Optical signal processing, Cameras, Image processing, Fourier transforms, Image analysis, Image filtering, Phase shifts

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Proceedings Article | 18 August 2014 Paper

Links between fringe pattern analysis and digital image correlation: windowed, optimal, and tracking (WOT)

Kemao Qian

Proc. SPIE. 9203, Interferometry XVII: Techniques and Analysis

KEYWORDS: Staring arrays, Fringe analysis, Detection and tracking algorithms, Data modeling, Image processing, Fourier transforms, Speckle pattern, Digital image correlation, Phase shifts, Data analysis

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SPIE Press Book | 2 August 2013

Windowed Fringe Pattern Analysis

Qian Kemao

KEYWORDS: Fringe analysis, Fourier transforms, Demodulation, Phase shifts, Error analysis, Speckle, Laser optics, Denoising, Optical filters, Interferometry

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Proceedings Article | 22 June 2013 Paper

Window size selection of windowed fourier ridges for phase discontinuity in quality-guided phase unwrapping

Ming Zhao, Qian Kemao

Proc. SPIE. 8769, International Conference on Optics in Precision Engineering and Nanotechnology (icOPEN2013)

KEYWORDS: Nanotechnology, Optical filters, Fringe analysis, Fourier transforms, Interferometry, Interferometric synthetic aperture radar, Computer engineering, Tolerancing, Precision optics, Current controlled current source

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SPIE Journal Paper | 4 May 2012

Toward real-time virtual biopsy of oral lesions using confocal laser endomicroscopy interfaced with embedded computing

Patricia Thong, Malini Olivo, Ramaswamy Bhuvaneswari, Stephanus Tandjung, Muhammad Movania, Wei-Ming Chiew, Hock-Soon Seah, Feng Lin, Kemao Qian, Khee-Chee Soo

JBO Vol. 17 Issue 5

KEYWORDS: Confocal microscopy, Biopsy, Luminescence, 3D image processing, Tongue, 3D acquisition, Sodium, Volume rendering, Computing systems, Field programmable gate arrays

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Proceedings Article | 9 June 2011 Paper

Toward three-dimensional virtual biopsy of oral lesions through the development of a confocal endomicroscope interfaced with embedded computing

Patricia S. Thong, Malini Olivo, Muhammad Movania, Stephanus Tandjung, Ramaswamy Bhuvaneswari, Hock-Soon Seah, Feng Lin, Kemao Qian, Khee-Chee Soo

Proc. SPIE. 8086, Advanced Microscopy Techniques II

KEYWORDS: Confocal microscopy, Visualization, Imaging systems, Luminescence, Field programmable gate arrays, Biopsy, Volume rendering, Endomicroscopy, Sodium, 3D image processing

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Proceedings Article | 17 November 2010 Paper

Comparison of two-dimensional phase retrieval methods from single interference fringe pattern

Huang Lei, Kemao Qian, Anand Asundi

Proc. SPIE. 7851, Information Optics and Optical Data Storage

KEYWORDS: Fringe analysis, Wavelet transforms, Aerospace engineering, Speckle, Reflectivity, Fourier transforms, Transform theory, Phase retrieval, 3D metrology, Phase measurement

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Proceedings Article | 25 August 2009 Paper

Links between regularized phase tracking/windowed Fourier ridges for fringe pattern analysis and digital image correlation

Kemao Qian, Bing Pan, Feng Lin, Hock Soon Seah, Anand Asundi

Proc. SPIE. 7375, ICEM 2008: International Conference on Experimental Mechanics 2008

KEYWORDS: Fringe analysis, Detection and tracking algorithms, Aerospace engineering, Speckle, Image processing, Error analysis, Interferometry, Data processing, Digital image correlation, Optimization (mathematics)

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Proceedings Article | 13 July 2009 Paper

Detection and diagnosis of human oral cancer using hypericin fluorescence endoscopic imaging interfaced with embedded computing

Patricia S. Thong, Malini Olivo, Feng Lin, Hock-Soon Seah, Stephanus Tandjung, Kemao Qian, William W. Chin, Ramaswamy Bhuvaneswari, Kent Mancer, Khee-Chee Soo

Proc. SPIE. 7380, Photodynamic Therapy: Back to the Future

KEYWORDS: Confocal microscopy, Endoscopy, Cancer, Tumors, Tissues, Imaging systems, Luminescence, Computing systems, Embedded systems, 3D visualizations

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Proceedings Article | 3 October 2008 Paper

General structure for real-time fringe pattern preprocessing and implementation of median filter and average filter on FPGA

Wenjing Gao, Kemao Qian, Haixia Wang, Feng Lin, Hock Soon Seah, Lee Sing Cheong

Proc. SPIE. 7155, Ninth International Symposium on Laser Metrology

KEYWORDS: Fringe analysis, Clocks, Image processing, Digital filtering, Computing systems, Fourier transforms, Field programmable gate arrays, LCDs, Algorithm development, Filtering (signal processing)

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Proceedings Article | 3 October 2008 Paper

Faster window Fourier transform filters for fringe pattern analysis

Le Tran Hoai Nam, Kemao Qian

Proc. SPIE. 7155, Ninth International Symposium on Laser Metrology

KEYWORDS: Optical filters, Fringe analysis, Speckle, Digital filtering, Fourier transforms, Interferometry, Interference (communication), Phase interferometry, Convolution, Computer engineering

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Proceedings Article | 3 October 2008 Paper

Frequency-shifting method for phase retrieval from fringe patterns

Haixia Wang, Kemao Qian, Wenjing Gao

Proc. SPIE. 7155, Ninth International Symposium on Laser Metrology

KEYWORDS: Mirrors, Fringe analysis, Detection and tracking algorithms, Fourier transforms, Interferometry, Demodulation, Computer simulations, Phase retrieval, Computer engineering, Phase shifts

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Proceedings Article | 11 August 2008 Paper

Filtering-based phase unwrapping

Kemao Qian, Wenjing Gao, Haixia Wang

Proc. SPIE. 7063, Interferometry XIV: Techniques and Analysis

KEYWORDS: Optical filters, Wavelet transforms, Detection and tracking algorithms, Digital filtering, Wavelets, Fourier transforms, Interference (communication), Optical interferometry, Phase measurement, Electronic filtering

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SPIE Journal Paper | 1 July 2005

Two-dimensional windowed Fourier frames for noise reduction in fringe pattern analysis

Qian Kemao, Seah Hock Soon

OE Vol. 44 Issue 07

KEYWORDS: Fringe analysis, Denoising, Speckle, Optical filters, Fourier transforms, Optical engineering, Wavelets, Interference (communication), Digital filtering, Linear filtering

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Proceedings Article | 12 April 2005 Paper

Determination of phase-shift from two fringe patterns using windowed Fourier ridges

Kemao Qian, Hock Soon Seah, Anand Asundi

Proc. SPIE. 5852, Third International Conference on Experimental Mechanics and Third Conference of the Asian Committee on Experimental Mechanics

KEYWORDS: Fringe analysis, Fourier transforms, Interferometry, Phase interferometry, Convolution, Computer engineering, Mechanical engineering, Product engineering, Experimental mechanics, Phase shifts

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Proceedings Article | 2 August 2004 Paper

A simple phase unwrapping approach using windowed Fourier filtering

Qian Kemao, Seah Hock Soon, Anand Asundi

Proc. SPIE. 5531, Interferometry XII: Techniques and Analysis

KEYWORDS: Optical filters, Fringe analysis, Fourier transforms, Image filtering, Optical interferometry, Convolution, Computer engineering, Algorithm development, Mechanical engineering, Product engineering

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SPIE Journal Paper | 1 July 2004

Windowed Fourier transform method for demodulation of carrier fringes

Qian Kemao

OE Vol. 43 Issue 07

KEYWORDS: Fourier transforms, Demodulation, Fringe analysis, Optical metrology, Interference (communication), Electronic filtering, Computer engineering, Control systems, Convolution, Optical filters

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SPIE Journal Paper | 1 October 2003

Filtering the complex field in phase shifting interferometry

Kemao Qian, Hock Soon Seah, Anand Asundi

OE Vol. 42 Issue 10

KEYWORDS: Fourier transforms, Fringe analysis, Phase interferometry, Phase shifts, Phase retrieval, Optical filters, Speckle, Interference (communication), Computer engineering, Mechanical engineering

SPIE Journal Paper | 1 September 2003

Noise suppression in spatial carrier phase shifting method

Kemao Qian, Seah Hock Soon, Anand Asundi

OE Vol. 42 Issue 09

KEYWORDS: Bandpass filters, Phase shifting, Fringe analysis, Linear filtering, Fourier transforms, Computer simulations, Optical filters, Convolution, Computer engineering, Mechanical engineering

SPIE Journal Paper | 1 June 2003

Algorithm for directly retrieving the phase difference: a generalization

Kemao Qian, Anand Asundi

OE Vol. 42 Issue 06

KEYWORDS: Phase measurement, Phase shifting, Fringe analysis, Fourier transforms, Phase shifts, Speckle, Interferometry, LCDs, Interferometers, Sensors

Proceedings Article | 29 April 2003 Paper

Evaluation of binary speckle correlation

Kemao Qian, Hock Soon Seah, Asundi Anand

Proc. SPIE. 5058, Optical Technology and Image Processing for Fluids and Solids Diagnostics 2002

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Proceedings Article | 29 May 2002 Paper

Weighted phase unwrapping utilizing intensity modulation analysis for phase-shifting profilometry

Zhenyu Jiang, Kemao Qian, Hong Miao, Xiaoping Wu

Proc. SPIE. 4537, Third International Conference on Experimental Mechanics

KEYWORDS: Fringe analysis, Modulation, Mechanics, Phase shift keying, Shape analysis, Phase measurement, Mechanical engineering, Binary data, Phase shifts, Bandpass filters

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Proceedings Article | 29 May 2002 Paper

Advanced image processing method applied to speckle fringe pattern based on wavelet transform

Hong Miao, Zhenyu Jiang, Kemao Qian, Xiaoping Wu

Proc. SPIE. 4537, Third International Conference on Experimental Mechanics

KEYWORDS: Fringe analysis, Wavelet transforms, Speckle, Image processing, Crystals, Distortion, Linear filtering, Computer simulations, Image filtering, Nonlinear filtering

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Proceedings Article | 30 October 2001 Paper

Comparison of some phase-shifting algorithms with a phase step of pi/2

Kemao Qian

Proc. SPIE. 4596, Advanced Photonic Sensors and Applications II

KEYWORDS: Phase shifting, Detection and tracking algorithms, Sensors, Error analysis, Phase shift keying, Computer simulations, Phase interferometry, Algorithm development, Phase shifts, Algorithms

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Proceedings Article | 30 October 2001 Paper

Fourier transform method for phase retrieving from fringe patterns with carrier: window selection

Kemao Qian, Xiaoping Wu, Anand Asundi

Proc. SPIE. 4596, Advanced Photonic Sensors and Applications II

KEYWORDS: Photodetectors, Optical filters, Fringe analysis, Mechanics, Sensors, Fourier transforms, Computer simulations, Optical metrology, Image filtering

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Proceedings Article | 30 October 2001 Paper

Fourier transform method for phase retrieving from fringe patterns without carrier: beware its theoretical error

Kemao Qian, Jun Wang

Proc. SPIE. 4596, Advanced Photonic Sensors and Applications II

KEYWORDS: Photodetectors, Fringe analysis, Phase shifting, Spatial frequencies, Sensors, Error analysis, Fourier transforms, Optical metrology, Image filtering, Bandpass filters

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Proceedings Article | 7 May 1999 Paper

Novel image processing method applied to speckle fringe pattern based on the wavelet transform

Hong Miao, Kemao Qian, Xiaoping Wu

Proc. SPIE. 3740, Optical Engineering for Sensing and Nanotechnology (ICOSN '99)

KEYWORDS: Fringe analysis, Wavelet transforms, Speckle, Image processing, Digital filtering, Wavelets, Computer simulations, Speckle pattern, Image filtering, Binary data

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Showing 5 of 35 publications

Proceedings Volume Editor (7)

SPIE Conference Volume | 13 March 2021

International Workshop on Advanced Imaging Technology (IWAIT) 2021

SPIE Conference Volume | 16 October 2019

Seventh International Conference on Optical and Photonic Engineering (icOPEN 2019)

SPIE Conference Volume | 2 August 2018

Sixth International Conference on Optical and Photonic Engineering (icOPEN 2018)

SPIE Conference Volume | 6 November 2017

Fifth International Conference on Optical and Photonics Engineering

SPIE Conference Volume | 12 March 2015

International Conference on Experimental Mechanics 2014

Showing 5 of 7 publications

Conference Committee Involvement (24)

Dimensional Optical Metrology and Inspection for Practical Applications XI

3 April 2022 | Orlando, Florida, United States

Optical Metrology and Inspection for Industrial Applications VIII

10 October 2021 | Nantong, Jiangsu, China

Optical Technology and Measurement for Industrial Applications Conference

20 April 2021 | Online, Japan

Dimensional Optical Metrology and Inspection for Practical Applications X

12 April 2021 | Online Only, Florida, United States

International Workshop on Advanced Image Technology 2021

5 January 2021 | Online Only, Japan

Optical Metrology and Inspection for Industrial Applications VII

12 October 2020 | Online Only, China

Interferometry XX

24 August 2020 | Online Only, California, United States

Dimensional Optical Metrology and Inspection for Practical Applications IX

27 April 2020 | Online Only, California, United States

Optical Technology and Measurement for Industrial Applications Conference

22 April 2020 | Yokohama, Japan

Optical Metrology and Inspection for Industrial Applications VI

21 October 2019 | Hangzhou, China

Seventh International Conference on Optical and Photonic Engineering (icOPEN 2019)

16 July 2019 | Phuket, Thailand

Optical Technology and Measurement for Industrial Applications Conference

23 April 2019 | Yokohama, Japan

Dimensional Optical Metrology and Inspection for Practical Applications VIII

16 April 2019 | Baltimore, Maryland, United States

International Workshop on Advanced Image Technology

6 January 2019 | Singapore, Singapore

Optical Metrology and Inspection for Industrial Applications V

11 October 2018 | Beijing, China

Interferometry XIX

21 August 2018 | San Diego, California, United States

Sixth International Conference on Optical and Photonic Engineering

8 May 2018 | Shanghai, China

Fifth International Conference on Optical and Photonics Engineering

4 April 2017 | Singapore, Singapore

Optical Metrology and Inspection for Industrial Applications IV

12 October 2016 | Beijing, China

International Conference on Experimental Mechanics 2014

15 November 2014 | Singapore, Singapore

Optical Metrology and Inspection for Industrial Applications III

9 October 2014 | Beijing, China

International Conference on Optics in Precision Engineering and Nanotechnology (icOPEN2013)

9 April 2013 | Singapore, Singapore

Optical Metrology and Inspection for Industrial Applications II

5 November 2012 | Beijing, China

Fourth International Conference on Experimental Mechanics

18 November 2009 | Singapore, Singapore

Showing 5 of 24 Conference Committees

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