Prof. Nai-Jen Cheng Profile

Prof. Nai-Jen Cheng

Assistant Professor at National Kaohsiung Univ of Science and Technology

SPIE Involvement:

Author

Publications (27)

Proceedings Article | 30 September 2024 Poster + Paper

A signal processing algorithm for coaxial fringe projections in applications of 3D shape measurements

Wei-Hung Su, Nai-Jen Cheng, Hsin-Jen Hsu

Proceedings Volume 13140, 131400L (2024) https://doi.org/10.1117/12.3028439

KEYWORDS: 3D metrology, Inspection, 3D projection, Signal processing, Fringe analysis, CCD cameras, 3D applications

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Proceedings Article | 30 September 2024 Poster + Paper

Fabrications of graded index layers by means of mesoporous silica materials

Wei-Hung Su, Chun-Yen Huang, Shiao-Wei Kuo, Nai-Jen Cheng

Proceedings Volume 13140, 131400K (2024) https://doi.org/10.1117/12.3028436

KEYWORDS: Silica, Refractive index, Reflection, Antireflective coatings, Porosity

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Proceedings Article | 5 October 2023 Poster + Paper

3D profile measurements by coaxial fringe projections and image acquisitions

Nai-Jen Cheng, Hsin-Jen Hsu, Wei-Hung Su

Proceedings Volume 12682, 126820D (2023) https://doi.org/10.1117/12.2677325

KEYWORDS: Inspection, 3D projection, Fringe analysis, Image acquisition, 3D metrology, 3D acquisition, 3D image processing, Amplitude modulation, Discontinuities

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Proceedings Article | 3 October 2022 Presentation + Paper

Phase-shifting projected fringe profilometry by binary-encoded projections

Wei-Hung Su, Nai-Jen Cheng

Proceedings Volume 12229, 1222909 (2022) https://doi.org/10.1117/12.2632370

KEYWORDS: Phase shifts, Binary data, Fringe analysis, Inspection, Reflectivity, Projection systems, Imaging arrays, Image sensors, Calibration, 3D metrology

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Proceedings Article | 20 August 2020 Poster + Paper

One-shot profile measurements for a rotating object using Fourier transform profilometry

Wei-Hung Su, Huai-Syuan Huang, Nai-Jen Cheng

Proceedings Volume 11498, 114980X (2020) https://doi.org/10.1117/12.2572296

KEYWORDS: Fourier transforms, Inspection, Fringe analysis, Image sensors, 3D metrology

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Proceedings Article | 9 September 2019 Paper

Profile measurements using contrast-encoded pattern projections

Nai-Jen Cheng, Sih-Yue Chen, Wei-Hung Su

Proceedings Volume 11123, 111230U (2019) https://doi.org/10.1117/12.2530714

KEYWORDS: Phase shifts, Fringe analysis, 3D metrology, Inspection, Phase measurement, Adaptive optics, Bromine, Calibration, Projection systems, CCD cameras

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Proceedings Article | 9 September 2019 Paper

Mask optimization for 1D scanning projected fringe profilometry

Nai-Jen Cheng, Chia-Yu Hsu, Yi-An Lin, Wei-Hung Su

Proceedings Volume 11123, 111230W (2019) https://doi.org/10.1117/12.2530716

KEYWORDS: Inspection, Source mask optimization, CCD cameras, Reflectivity, Image sensors, Imaging arrays, 3D metrology, Fringe analysis, Modulation, Image filtering

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Proceedings Article | 4 September 2018 Paper

3D image retrieval based on 1D scanning fringe projections

Nai-Jen Cheng, Chia-Yu Hsu, Yi-An Lin, Wei-Hung Su

Proceedings Volume 10755, 1075514 (2018) https://doi.org/10.1117/12.2323817

KEYWORDS: Inspection, 3D image processing, 3D metrology, CCD cameras, Image retrieval, Image filtering, Bandpass filters, Fringe analysis, Cameras, Halogens

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Proceedings Article | 23 August 2017 Presentation + Paper

Phase-shifting projected fringe profilometry using ternary-encoded patterns

Sih-Yue Chen, Nai-Jen Cheng, Wei-Hung Su

Proceedings Volume 10382, 103820U (2017) https://doi.org/10.1117/12.2275325

KEYWORDS: Fringe analysis, Phase shifts, Optical inspection, Data processing, Reliability, Photonic devices

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Proceedings Article | 23 August 2017 Presentation + Paper

A scanning approach using a binary grid pattern for 3D shape measurements

Nai-Jen Cheng, Wei-Hung Su

Proceedings Volume 10382, 103820N (2017) https://doi.org/10.1117/12.2275327

KEYWORDS: 3D metrology, Binary data, 3D surface sensing, Optical sensing, Optical inspection, Projection systems, Inspection, Photonic devices

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Proceedings Article | 7 September 2016 Paper

Scanning fringe projection for 3D shape measurements

Nai-Jen Cheng, Wei-Hung Su

Proceedings Volume 9958, 99581B (2016) https://doi.org/10.1117/12.2240069

KEYWORDS: 3D metrology, 3D image processing, Image processing, Inspection, CCD cameras, Bandpass filters, Fringe analysis, Fourier transforms, Beam splitters, Light sources

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Proceedings Article | 7 September 2016 Paper

Phase unwrapping using binary-encoded fringe pattern for phase-shifting projected fringe profilometry

Nai-Jeng Cheng, Sih-Yue Chen, Wei-Hung Su

Proceedings Volume 9958, 995819 (2016) https://doi.org/10.1117/12.2240067

KEYWORDS: Fringe analysis, Phase shifts, Computer programming, Reflectivity, Binary data, Inspection, Transmittance, 3D metrology, Time metrology, Photonic crystal fibers

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Proceedings Article | 26 August 2015 Paper

A reliable image processing algorithm using the scanning fringe projection for 3D profile measurements

Nai-Jen Cheng, Wei-Hung Su

Proceedings Volume 9586, 95861I (2015) https://doi.org/10.1117/12.2190222

KEYWORDS: Inspection, 3D metrology, 3D image processing, Fringe analysis, CCD cameras, Image processing, Cameras, Beam splitters, Image filtering, 3D image enhancement

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Proceedings Article | 5 September 2014 Paper

Projected fringe profilometry for non-diffusive objects

Wei-Hung Su, Nai-Jen Cheng

Proceedings Volume 9200, 92001I (2014) https://doi.org/10.1117/12.2064306

KEYWORDS: Holograms, Fringe analysis, Inspection, Glasses, 3D metrology, CCD cameras, Reflection, Mirrors, Projection devices, Holography

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Proceedings Article | 5 September 2014 Paper

A scanning approach using fringe projection techniques for 3D profile measurements

Nai-Jen Cheng, Wei-Hung Su, Yung-Chi Chen

Proceedings Volume 9200, 92001K (2014) https://doi.org/10.1117/12.2064308

KEYWORDS: 3D metrology, Inspection, CCD cameras, Fringe analysis, Cameras, 3D image processing, Fourier transforms, Light sources, Beam splitters, Photonic crystal fibers

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Proceedings Article | 26 September 2013 Paper

Study of 3D solder-paste profilometer by dual digital fringe projection

Yi-Hua Juan, Jeng-Nan Yih, Nai-Jen Cheng

Proceedings Volume 8856, 88562P (2013) https://doi.org/10.1117/12.2027120

KEYWORDS: Projection systems, 3D image processing, 3D metrology, Profilometers, Control systems, Metals, Computing systems, Phase shifts, Charge-coupled devices, Specular reflections

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Proceedings Article | 25 September 2013 Paper

Using a projected fringe pattern to identify the focused image and its application to 3D shape measurements

Nai-Jen Cheng, Wei-Hung Su

Proceedings Volume 8847, 88471L (2013) https://doi.org/10.1117/12.2025421

KEYWORDS: 3D metrology, Inspection, Fringe analysis, 3D image processing, CCD cameras, Cameras, 3D applications, Fourier transforms, Photonic crystal fibers, Sensors

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Proceedings Article | 25 September 2013 Paper

3D shape measurements for non-diffusive objects using fringe projection techniques

Wei-Hung Su, Bae-Heng Tseng, Nai-Jen Cheng

Proceedings Volume 8847, 88471K (2013) https://doi.org/10.1117/12.2025418

KEYWORDS: 3D metrology, Holograms, Inspection, Fringe analysis, Glasses, CCD cameras, Reflection, Holography, Image acquisition, Mirrors

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Proceedings Article | 11 September 2013 Paper

Detection of saccharides with a fluorescent sensing device based on a gold film modified with 4-mercaptophenylboronic acid monolayer

Shu-Jen Chen, Jui-Feng Chang, Nai-Jen Cheng, Jeng-Nan Yih, Kuo-Chi Chiu

Proceedings Volume 8812, 881210 (2013) https://doi.org/10.1117/12.2023060

KEYWORDS: Luminescence, Glucose, Gold, Sensors, Compact discs, Applied sciences, Molecules, FT-IR spectroscopy, Self-assembled monolayers, Receptors

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Proceedings Article | 19 October 2000 Paper

Phase conjugator with high-o/e-ratio tolerance using the BaTiO3 crystal

Tzu-Chiang Chen, Hong-Chang Kung, Nai-Jen Cheng, Hsiao-Yi Lee, Hon-Fai Yau

Proceedings Volume 4110, (2000) https://doi.org/10.1117/12.404805

KEYWORDS: Crystals, Polarization, Ferroelectric materials, Photorefraction, Tolerancing, Laser crystals, Biomedical optics, Data processing, Phase conjugation, Crystallography

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Proceedings Article | 19 October 2000 Paper

Generation of o-polarized phase-conjugated waves using photogalvanic effect

Hong-Chang Kung, Tzu-Chiang Chen, Hon-Fai Yau, Hsiao-Yi Lee, Nickolai Kukhtarev, Ching-Cherng Sun, Nai-Jen Cheng

Proceedings Volume 4110, (2000) https://doi.org/10.1117/12.404806

KEYWORDS: Crystals, Laser crystals, Phase conjugation, Backscatter, Ferroelectric materials, Polarization, Biomedical optics, Dielectric polarization, Photovoltaics, Four wave mixing

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Proceedings Article | 20 September 1999 Paper

Flow of signals via a photorefractive crystal

OuYang Yueh, Tsair-Chun Liang, Nai-Jen Cheng, Hsiao-Yi Lee

Proceedings Volume 3801, (1999) https://doi.org/10.1117/12.363947

KEYWORDS: Crystals, Beam splitters, Phase conjugation, Ferroelectric materials, Polarization, Optical computing, Crystallography, Ocean optics, Computing systems, Laser crystals

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Proceedings Article | 9 October 1998 Paper

Real-time incoherent optical pattern recognition with photorefractive crystals

Nai-Jen Cheng, Hsiao-Yi Lee, Ren-Han Tsou, Hon-Fai Yau

Proceedings Volume 3470, (1998) https://doi.org/10.1117/12.326861

KEYWORDS: Crystals, Ferroelectric materials, Optical pattern recognition, Four wave mixing, Laser crystals, Near infrared, Beam splitters, Light, Real-time computing, Argon ion lasers

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Proceedings Article | 9 October 1998 Paper

Incoherent multifunction parallel optical digital computing device in double self-pumped phase conjugators

Hsiao-Yi Lee, Hon-Fai Yau, Nai-Jen Cheng

Proceedings Volume 3470, (1998) https://doi.org/10.1117/12.326855

KEYWORDS: Ferroelectric materials, Crystals, Polarization, Phase conjugation, Laser crystals, Logic, Beam splitters, Optical computing, Surgery, Radio optics

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SPIE Journal Paper | 1 July 1998

Incoherent optical XOR logic gate and image subractor with series self-pumped phase conjugators

Hsiao-Yi Lee, Hon-Fai Yau, Nai-Jen Cheng

OE, Vol. 37, Issue 07, (July 1998) https://doi.org/10.1117/12.10.1117/1.601902

KEYWORDS: Crystals, Laser crystals, Beam splitters, Logic devices, Phase conjugation, Polarization, Wave plates, Adaptive optics, Energy coupling, Optical engineering

Proceedings Article | 21 April 1995 Paper

Matching algorithm for radical-based online Chinese character recognition

Quen-Zong Wu, I-Chang Jou, Bor-Shenn Jeng, Chao-Hao Lee, Miin-Luen Day, Nai-Jen Cheng

Proceedings Volume 2501, (1995) https://doi.org/10.1117/12.206749

KEYWORDS: Distortion, Detection and tracking algorithms, Optical character recognition, Silicon, Optics, Data processing, Lithium, Neural networks, Computer programming, Model-based design

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Proceedings Article | 1 November 1991 Paper

Computer-aided photorefractive pattern recognition

Ching-Cherng Sun, Ming-Wen Chang, Smile Yeh, Nai-Jen Cheng

Proceedings Volume 1564, (1991) https://doi.org/10.1117/12.49710

KEYWORDS: Crystals, Computing systems, Ferroelectric materials, Holograms, Pattern recognition, Optical pattern recognition, Volume holography, Diffraction, Spatial light modulators, Optical filters

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Showing 5 of 27 publications

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