Dr. Feihong Yu Profile

Dr. Feihong Yu

at Zhejiang Univ

SPIE Involvement:

Author

Publications (70)

Proceedings Article | 18 December 2023 Paper

Paper

A microscopic image enhancement algorithm and its implementation on mobile platforms

Siqi Liu, Feihong Yu

Proceedings Volume 12963, 129630H (2023) https://doi.org/10.1117/12.3006372

KEYWORDS: Image enhancement, Image transmission, Image processing, Image filtering, Microscopes, Tunable filters, Image quality, Image contrast enhancement, Signal intensity, Image restoration

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Proceedings Article | 5 November 2020 Paper

Paper

Design and implementation of an improved unsharp masking real-time image enhancement method based on FPGA

Yukun Hao, Feihong Yu

Proceedings Volume 11567, 1156723 (2020) https://doi.org/10.1117/12.2579738

KEYWORDS: Image enhancement, Image filtering, Image processing, Field programmable gate arrays, Gaussian filters, Video, Video processing, Detection and tracking algorithms, Digital filtering

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Proceedings Article | 5 November 2020 Paper

Paper

The realization of USB3.0 auto focusing microscopic camera based on UVC protocol

Haosheng Xia, Feihong Yu

Proceedings Volume 11568, 1156817 (2020) https://doi.org/10.1117/12.2579890

KEYWORDS: Cameras, Microscopes, Video, Microscopy, Control systems, Calibration, Binary data, Zoom lenses, Video processing

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Proceedings Article | 5 November 2020 Paper

Paper

Optical system design of continuous zoom objective lens with multi-conjugate distances

Tengfei Chen, Jie Wang, Jinlin Liu, Jia Shi, Feihong Yu

Proceedings Volume 11568, 115680B (2020) https://doi.org/10.1117/12.2575598

KEYWORDS: Zoom lenses, Objectives, Imaging systems, Optical design, Image sensors, Distortion, Lens design, Image quality standards, Modulation transfer functions, Image quality

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Proceedings Article | 5 November 2020 Paper

Paper

Quick-start HDMI microscope camera with dual operating system architecture based on Hi3559V200 platform

Wei Qu, Feihong Yu

Proceedings Volume 11568, 1156818 (2020) https://doi.org/10.1117/12.2579893

KEYWORDS: Operating systems, Cameras, Microscopes, Human-machine interfaces, Image processing, Imaging systems, Embedded systems, Video

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Proceedings Article | 5 November 2020 Paper

Paper

Multi-focus image fusion based on depth estimation in HSV space

Tingna Kuang, Haiyang Zhou, Feihong Yu

Proceedings Volume 11567, 115670Q (2020) https://doi.org/10.1117/12.2575698

KEYWORDS: Image fusion, RGB color model, Image processing, Point spread functions, Image analysis, Digital image processing, Microscopes

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Proceedings Article | 5 November 2020 Paper

Paper

Design and implementation of picture preview scheme in HDMI microscope camera

Mingjin Ge, Ni Jiang, Feihong Yu

Proceedings Volume 11568, 115681E (2020) https://doi.org/10.1117/12.2580050

KEYWORDS: Cameras, Image segmentation, Image processing, Microscopes, Software development, Computer programming, Video, Data storage, Video coding

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Proceedings Article | 5 November 2020 Paper

Paper

Design of high-performance industrial camera system based on FPGA and DDR3

Linxin Zhou, Feihong Yu

Proceedings Volume 11568, 115681I (2020) https://doi.org/10.1117/12.2580120

KEYWORDS: Field programmable gate arrays, Image sensors, Data conversion, Video, Image processing, Cameras, Imaging systems, Image transmission, Image quality

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Proceedings Article | 12 March 2020 Paper

Paper

Design of large-array CMOS real-time imaging system based on FPGA

Ting Zhang, Feihong Yu

Proceedings Volume 11438, 1143815 (2020) https://doi.org/10.1117/12.2555145

KEYWORDS: Image sensors, Field programmable gate arrays, Image processing, Imaging systems, Data conversion, Image transmission, Real time imaging, High dynamic range imaging, Image resolution, Image quality

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Proceedings Article | 25 October 2018 Paper

Paper

A real-time continuous auto-focus algorithm for stereo microscope cameras

Rui Zhou, Hongyan Ding, Feihong Yu

Proceedings Volume 10822, 108220L (2018) https://doi.org/10.1117/12.2324456

KEYWORDS: Microscopes, Cameras, Image processing, Sensors, Prototyping, Image analysis, Optics, Tracking and scene analysis, Embedded systems

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Proceedings Article | 9 August 2018 Paper

Paper

Deep space image registration method based on geometric feature of triangles constructed by neighbor stars

Xinyan Zhu, Hui Xu, Haiyang Zhou, Feihong Yu

Proceedings Volume 10806, 108062H (2018) https://doi.org/10.1117/12.2502913

KEYWORDS: Stars, Image registration, Image processing, Feature extraction, Remote sensing, Machine vision

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Proceedings Article | 10 January 2018 Paper

Paper

A robust embedded vision system feasible white balance algorithm

Yuan Wang, Feihong Yu

Proceedings Volume 10616, 1061607 (2018) https://doi.org/10.1117/12.2287363

KEYWORDS: Iterative methods, Image processing, Embedded systems, RGB color model, Imaging systems, Cameras, Color image processing

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Proceedings Article | 25 October 2016 Paper

Paper

Improved single image super-resolution based on edge directed interpolation

Haiyang Zhou, Ling Yan, Lei Zhang, Rong Zheng, Feihong Yu

Proceedings Volume 9686, 96860K (2016) https://doi.org/10.1117/12.2241611

KEYWORDS: Super resolution, Image interpolation, Image quality, Lawrencium, Digital image processing, Visualization, RGB color model, Computer simulations, Lithium, Image enhancement

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Proceedings Article | 25 October 2016 Paper

Paper

An automatic white balance method based on gray world and coincidence of chromaticity histogram

Lei Zhang, Haiyang Zhou, Ling Yan, Rong Zheng, Feihong Yu

Proceedings Volume 9686, 968616 (2016) https://doi.org/10.1117/12.2242618

KEYWORDS: Digital imaging, Digital cameras, Cameras, Detection and tracking algorithms, Image sensors, Image processing, Light sources, Light, RGB color model, Image storage

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Proceedings Article | 25 October 2016 Paper

Paper

An efficient algorithm based on the fast fuzzy theory for image and video dehazing

Rong Zheng, Haiyang Zhou, Lei Zhang, Lin Yan, Feihong Yu

Proceedings Volume 9686, 96861A (2016) https://doi.org/10.1117/12.2242617

KEYWORDS: Fuzzy logic, Video, Algorithms, Air contamination, Image processing, Image transmission, Image restoration, Atmospheric modeling, Convolution, Video surveillance

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Proceedings Article | 25 October 2016 Paper

Paper

The method of color restoration based on CYMG complementary colors CFA pattern

Ling Yan, Haiyang Zhou, Feihong Yu

Proceedings Volume 9686, 968615 (2016) https://doi.org/10.1117/12.2242619

KEYWORDS: Charge-coupled devices, Magnesium, RGB color model, Optical filters, Color difference, Image quality, CCD image sensors, Digital filtering, Image filtering, Interference (communication)

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Proceedings Article | 8 October 2015 Paper

Paper

Thickness measurement of low reflectance optical thin film with transparent substrate

Guo Xia, Qianshun Liu, Haiyang Zhou, Feihong Yu

Proceedings Volume 9677, 96770K (2015) https://doi.org/10.1117/12.2197726

KEYWORDS: Reflectivity, Thin films, Reflection, Magnesium fluoride, Optical testing, Absorption, Optics manufacturing, Transmittance, Opacity, Neodymium

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Proceedings Article | 8 October 2015 Paper

Paper

Improved restoration algorithm for weakly blurred and strongly noisy image

Qianshun Liu, Guo Xia, Haiyang Zhou, Jian Bai, Feihong Yu

Proceedings Volume 9675, 96750J (2015) https://doi.org/10.1117/12.2197673

KEYWORDS: Image restoration, Digital imaging, Image processing, Denoising, Computer simulations, Cameras, Databases, Image compression, Image analysis, Image filtering

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Proceedings Article | 8 October 2015 Paper

Paper

A robust multi-frame image blind deconvolution algorithm via total variation

Haiyang Zhou, Guo Xia, Qianshun Liu, Feihong Yu

Proceedings Volume 9675, 96750I (2015) https://doi.org/10.1117/12.2197528

KEYWORDS: Deconvolution, Image restoration, Image quality, Image analysis, Error analysis, Medical imaging, Inverse problems, Image processing, Photography, Astronomical imaging

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Proceedings Article | 8 October 2015 Paper

Paper

A non-linearity correction method of charge-coupled device array spectrometer

Guo Xia, Qianshun Liu, Haiyang Zhou, Feihong Yu

Proceedings Volume 9677, 96770J (2015) https://doi.org/10.1117/12.2197725

KEYWORDS: Charge-coupled devices, Spectroscopy, Sensors, CCD image sensors, Light sources, Mirrors, Scientific research, Electrons, Optical testing, Spectrometer engineering

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Proceedings Article | 19 September 2014 Paper

Paper

A fast and automatic fusion algorithm for unregistered multi-exposure image sequence

Yan Liu, Feihong Yu

Proceedings Volume 9216, 921613 (2014) https://doi.org/10.1117/12.2060036

KEYWORDS: Image fusion, Sensors, Image processing, Detection and tracking algorithms, High dynamic range imaging, Stationary wavelet transform, Image registration, Visualization, Digital cameras, Digital imaging

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Proceedings Article | 30 August 2013 Paper

Paper

An algorithm used for quality criterion automatic measurement of band-pass filters and its device implementation

Qianshun Liu, Yan Liu, Feihong Yu

Proceedings Volume 8910, 89100K (2013) https://doi.org/10.1117/12.2032611

KEYWORDS: Bandpass filters, Transmittance, Optical filters, Linear filtering, Wavelets, Interference (communication), Detection and tracking algorithms, Quality measurement, Signal detection, Wavelet transforms

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Proceedings Article | 21 August 2013 Paper

Paper

A new testing method of SNR for cooled CCD imaging camera based on stationary wavelet transform

Yan Liu, Qianshun Liu, Feihong Yu

Proceedings Volume 8908, 890819 (2013) https://doi.org/10.1117/12.2033236

KEYWORDS: Signal to noise ratio, CCD cameras, Charge-coupled devices, Cameras, Stationary wavelet transform, Testing and analysis, Image quality, Interference (communication), Medical imaging, Imaging systems

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SPIE Journal Paper | 16 August 2013

Compact Flyeye concentrator with improved irradiance uniformity on solar cell

Zhenfeng Zhuang, Feihong Yu

OE, Vol. 52, Issue 08, 087108, (August 2013) https://doi.org/10.1117/12.10.1117/1.OE.52.8.087108

KEYWORDS: Solar concentrators, Solar cells, Mirrors, Photovoltaics, Chromium, Geometrical optics, Wavefronts, Optical engineering, Solids, Sun

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SPIE Journal Paper | 7 January 2013

Accurate wavelength calibration method using system parameters for grating spectrometers

Kang Liu, Feihong Yu

OE, Vol. 52, Issue 01, 013603, (January 2013) https://doi.org/10.1117/12.10.1117/1.OE.52.1.013603

KEYWORDS: Calibration, Spectrometers, Mirrors, Sensors, Spectral calibration, Detector arrays, Mercury, Argon, Optical engineering, Geometrical optics

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Proceedings Article | 16 October 2012 Paper

Paper

Optimization of freeform cylindrical lens in Czerny-Turner spectrometer system to correct the astigmatism by using user defined error function

Bixiang Qu, Guo Xia, Feihong Yu

Proceedings Volume 8416, 84161I (2012) https://doi.org/10.1117/12.971480

KEYWORDS: Spectroscopy, Monochromatic aberrations, Mirrors, Imaging systems, Diffraction gratings, Code v, Diffraction, Spherical lenses, CCD image sensors, Off axis mirrors

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Proceedings Article | 15 October 2012 Paper

Paper

Design of high-resolution digital microscope eyepiece based on FPGA

Jin Cai, Enguo Chen, Peng Liu, Feihong Yu

Proceedings Volume 8419, 84190V (2012) https://doi.org/10.1117/12.973645

KEYWORDS: Field programmable gate arrays, Microscopes, Image processing, Video, Imaging systems, Image sensors, Sensors, Image storage, CMOS sensors, Control systems

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Proceedings Article | 15 October 2012 Paper

Paper

Segment and spline synthesis optimization method for LED based freeform total-internal-reflection lens design

Enguo Chen, Zhenfeng Zhuang, Jin Cai, Yan Liu, Feihong Yu

Proceedings Volume 8420, 84200T (2012) https://doi.org/10.1117/12.973665

KEYWORDS: Light emitting diodes, Lens design, Optimization (mathematics), LED lighting, Light sources and illumination, General lighting, Optical design, Computer aided design, LED displays, Polymethylmethacrylate

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Proceedings Article | 15 October 2012 Paper

Paper

Defocus insensitive projection lens for CF-LCOS pico-projector

Peng Liu, Qinxiao Liu, Feihong Yu

Proceedings Volume 8420, 84200V (2012) https://doi.org/10.1117/12.973647

KEYWORDS: Modulation transfer functions, Liquid crystal on silicon, Diffraction, Lens design, Wavefronts, Cell phones, Imaging systems, Monochromatic aberrations, Projection systems, Mechanical engineering

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Proceedings Article | 15 October 2012 Paper

Paper

Research on eliminating high-order spectrum in broadband miniature spectrometer system

Kang Liu, Feihong Yu

Proceedings Volume 8415, 841506 (2012) https://doi.org/10.1117/12.975647

KEYWORDS: Spectroscopy, Optical filters, Sensors, Diffraction, Lamps, Manufacturing, Tungsten, Halogens, Diffraction gratings, Coating

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Proceedings Article | 15 October 2012 Paper

Paper

Optical characterization for off-axis illumination in DLP system

Zhenfeng Zhuang, Enguo Chen, Bixiang Qu, Feihong Yu

Proceedings Volume 8419, 84191L (2012) https://doi.org/10.1117/12.971183

KEYWORDS: Prisms, Relays, Digital Light Processing, Digital micromirror devices, Monochromatic aberrations, Ray tracing, Geometrical optics, Projection systems, Optical components, Mirrors

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Proceedings Article | 15 October 2012 Paper

Paper

A color image processing pipeline for digital microscope

Yan Liu, Peng Liu, Zhefeng Zhuang, Enguo Chen, Feihong Yu

Proceedings Volume 8419, 84191N (2012) https://doi.org/10.1117/12.974276

KEYWORDS: Microscopes, Image sensors, Color image processing, Image processing, Digital image processing, Sensors, Image quality, Digital imaging, Cameras, Data conversion

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SPIE Journal Paper | 6 September 2012

Polarization recovery for liquid crystal-on-silicon pico projection

Wenzi Zhang, Bixiang Qu, Feihong Yu

OE, Vol. 51, Issue 9, 093001, (September 2012) https://doi.org/10.1117/12.10.1117/1.OE.51.9.093001

KEYWORDS: Polarization, Liquid crystal on silicon, Collimation, Light emitting diodes, Crystals, Relays, Nonimaging optics, Liquids, Liquid crystals, Solids

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SPIE Journal Paper | 12 March 2012

Optical design of single plano-convex freeform lens-based illumination system for color filter liquid crystal on silicon pico projectors

Enguo Chen, Peng Liu, Feihong Yu

OE, Vol. 51, Issue 03, 033002, (March 2012) https://doi.org/10.1117/12.10.1117/1.OE.51.3.033002

KEYWORDS: Liquid crystal on silicon, Light emitting diodes, Optimization (mathematics), Optical design, Pico projectors, Illumination engineering, Optical filters, Optical engineering, Tolerancing, Projection systems

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Proceedings Article | 11 November 2010 Paper

Paper

Digital camera auto white balance based on color temperature estimation clustering

Lei Zhang, Peng Liu, Yuling Liu, Feihong Yu

Proceedings Volume 7850, 78502J (2010) https://doi.org/10.1117/12.871051

KEYWORDS: Light sources, Digital cameras, Sensors, Sun, Image analysis, Human vision and color perception, Light, Video, Light sources and illumination, Image quality

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Proceedings Article | 9 November 2010 Paper

Paper

Research on the surface reflectance measurement of optical element with transparent substrate

Guo Xia, Xingzhi Gong, Liang Cheng, Feihong Yu

Proceedings Volume 7849, 78492V (2010) https://doi.org/10.1117/12.871620

KEYWORDS: Reflectivity, Optical components, Distance measurement, Reflection, Optical testing, Receivers, Opacity, Calibration, Absorption, Magnesium fluoride

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Proceedings Article | 9 November 2010 Paper

Paper

System tolerance analysis of dual-advantage spectrographic system based on coded aperture

Liang Cheng, Xingzhi Gong, Feihong Yu

Proceedings Volume 7849, 78492X (2010) https://doi.org/10.1117/12.871670

KEYWORDS: Coded apertures, Calibration, Systems modeling, Tolerancing, Error analysis, Sensors, Spectral resolution, Imaging systems, Performance modeling, Multichannel imaging systems

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SPIE Journal Paper | 1 June 2010

Free-form reflector optimization for general lighting

Wenzi Zhang, Qin-Xiao Liu, Huifang Gao, Feihong Yu

OE, Vol. 49, Issue 06, 063003, (June 2010) https://doi.org/10.1117/12.10.1117/1.3430576

KEYWORDS: Reflectors, General lighting, Light emitting diodes, Optical engineering, Reflector design, Computer simulations, Optical components, Target acquisition, Optical design, Monte Carlo methods

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Proceedings Article | 1 December 2009 Paper

Paper

Fly-eyes illumination analysis

Wenzi Zhang, Qinxiao Liu, Huifang Gao, Feihong Yu

Proceedings Volume 7506, 75061W (2009) https://doi.org/10.1117/12.837880

KEYWORDS: Light sources and illumination, Microscopes, Lithographic illumination, Collimation, Imaging arrays, Illumination engineering, Optical components, Printing, Integration, Paraxial approximations

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Proceedings Article | 1 December 2009 Paper

Paper

Compact LED based LCOS optical engine for mobile projection

Wenzi Zhang, Xiaoyan Li, Qinxiao Liu, Feihong Yu

Proceedings Volume 7506, 75061Y (2009) https://doi.org/10.1117/12.837877

KEYWORDS: Liquid crystal on silicon, Light emitting diodes, Digital Light Processing, Lens design, Ray tracing, Optical filters, Polarization, LED lighting, Optical components, Optimization (mathematics)

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Proceedings Article | 26 November 2009 Paper

Paper

The design of data acquisition system of the NIRS instrument based on USB

Xiaolong Guo, Dong Chu, Peng Liu, Feihong Yu

Proceedings Volume 7506, 75061B (2009) https://doi.org/10.1117/12.837935

KEYWORDS: Charge-coupled devices, Near infrared spectroscopy, Data acquisition, Signal processing, Spectroscopy, Interference (communication), Cadmium sulfide, Infrared spectroscopy, Near infrared, Software development

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Proceedings Article | 26 November 2009 Paper

Paper

A new polarization multiplexing method for the micro LCOS projector optical system

Qin-xiao Liu, Wen-zi Zhang, Hui-fang Gao, Fei-hong Yu

Proceedings Volume 7506, 75061A (2009) https://doi.org/10.1117/12.837843

KEYWORDS: Calcite, Polarization, Liquid crystal on silicon, Projection systems, Multiplexing, Wave plates, Liquid crystals, Light sources, Crystals, Crystal optics

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Proceedings Article | 25 November 2009 Paper

Paper

3D reconstruction based on wavelet pyramid image fusion algorithm for digital microscope

Lei Zhang, Peng Liu, Yuling Liu, Feihong Yu

Proceedings Volume 7513, 751312 (2009) https://doi.org/10.1117/12.837397

KEYWORDS: Image fusion, Reconstruction algorithms, 3D modeling, Image processing, Wavelets, Microscopes, 3D image processing, 3D image reconstruction, Digital imaging, Discrete wavelet transforms

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Optical microscopy is an important technique in petrological and biological. However, because of the limited focus depth of a traditional optical microscope, 3D objects can't be observed with all its information in one scene. The commonly used method to solve this problem is to use a digital microscope to collect a sequence of multi-focus images with a constant change of the focal length and then get the final sharp image by fusing the images. Wavelet pyramid algorithm is one of the commonly used fusion algorithms and has a good performance. In this paper, a novel 3D reconstruction algorithm is presented based on the wavelet pyramid image fusion algorithm. First, a sequence of multi-focus images is collected with a digital microscope and then the images are fused with the wavelet pyramid fusion algorithm. After that, the deviation between the fused image and each of the original multi-focus images are calculated pixel by pixel. For convenience, the absolute value of the deviation is calculated. The smaller the deviation, the closer the corresponding pixel to the focal plane and vice versa. Thus a 3D deviation matrix is obtained. For each pixel position (x, y), the z index of the smallest deviation value in the third direction of the deviation matrix is considered the pixel's height index. A complete height index map is obtained by selecting the indices of these smallest deviation values. In order to eliminate the noise effect, a median filter is applied to the height index map. The height index map times the height factor (the unit step length along the optical axis when collecting the multi-focus images) is the object's actual height map. Finally, the surface of the 3D object is reconstructed with the object's height map. In order to test the reconstruction algorithm, a dedicated high resolution Complementary Metal Oxide Semiconductor (CMOS) digital microscope is designed and fabricated to collect the multi-focus images. Experimental results show that the proposed algorithm produces a nice looking surface of a 3D object.

Proceedings Article | 25 November 2009 Paper

Paper

The research of underwater imaging based on the wavefront coding system

Qin-xiao Liu, Ting-yu Zhao, Yan-ping Chen, Fei-hong Yu

Proceedings Volume 7513, 75131P (2009) https://doi.org/10.1117/12.837844

KEYWORDS: Imaging systems, Wavefronts, Underwater imaging, Point spread functions, Image compression, Image processing, Water, Deconvolution, Image restoration, Cameras

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Proceedings Article | 20 November 2009 Paper

Paper

The application of new simulated annealing genetic algorithm in film characters measurement

Dong Chu, Xing-zhi Gong, Liang Cheng, Fei-hong Yu

Proceedings Volume 7511, 75111K (2009) https://doi.org/10.1117/12.837924

KEYWORDS: Thin films, Genetic algorithms, Algorithms, Reflectivity, Optimization (mathematics), Glasses, Multilayers, Algorithm development, Genetics, Reflectance spectroscopy

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Proceedings Article | 6 August 2009 Paper

Paper

Real-time multi-core parallel image sharpness evaluation algorithm for high resolution CCD/CMOS based digital microscope autofocus imaging system

Lei Zhang, Peng Liu, Yu-ling Liu, Fei-hong Yu

Proceedings Volume 7384, 738415 (2009) https://doi.org/10.1117/12.835288

KEYWORDS: Image analysis, Imaging systems, Microscopes, Image resolution, Image processing, Parallel computing, Digital imaging, Evolutionary algorithms, Image acquisition, Digital image processing

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SPIE Journal Paper | 1 December 2008

Image restoration based on generalized minimal residual methods with antireflective boundary conditions in a wavefront coding system

Qin-Xiao Liu, Ting-yu Zhao, Wen-zi Zhang, Fei-hong Yu

OE, Vol. 47, Issue 12, 127005, (December 2008) https://doi.org/10.1117/12.10.1117/1.3050348

KEYWORDS: Image restoration, Antireflective coatings, Point spread functions, Wavefronts, Signal to noise ratio, Reflectivity, Optical engineering, Matrices, Filtering (signal processing), Image acquisition

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Proceedings Article | 8 January 2008 Paper

Paper

Real-time 3D image fusion based on wavelet transform in microscope auto-focusing system

Liqun Xu, Zi Ye, Xinxin Yan, Feihong Yu

Proceedings Volume 6826, 682620 (2008) https://doi.org/10.1117/12.755721

KEYWORDS: Image fusion, Image processing, Microscopes, Wavelets, 3D image processing, Wavelet transforms, Reconstruction algorithms, Digital cameras, Digital imaging, Digital image processing

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Proceedings Article | 4 January 2008 Paper

Paper

Analysis of static coded-aperture imaging spectrometer

Xingzhi Gong, Liang Cheng, Zi Ye, Feihong Yu

Proceedings Volume 6832, 68321F (2008) https://doi.org/10.1117/12.756058

KEYWORDS: Spectroscopy, Imaging systems, Sensors, Signal to noise ratio, Coded aperture imaging, Optical design, Image processing, Coded apertures, Image resolution, Image compression

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Proceedings Article | 4 January 2008 Paper

Paper

Research on a novel high gain model for dispersive spectrographic systems

Liang Cheng, Zi Ye, Xingzhi Gong, Feihong Yu

Proceedings Volume 6832, 68321Y (2008) https://doi.org/10.1117/12.756167

KEYWORDS: Systems modeling, Imaging systems, Coded apertures, Mathematical modeling, Spectral resolution, Signal to noise ratio, Computer programming, Mathematics, Spectroscopy, Multichannel imaging systems

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Proceedings Article | 4 January 2008 Paper

Paper

Field depth extension of 2D barcode scanner based on wavefront coding and projection algorithm

Tingyu Zhao, Zi Ye, Wenzi Zhang, Weiwei Huang, Feihong Yu

Proceedings Volume 6837, 683711 (2008) https://doi.org/10.1117/12.756077

KEYWORDS: Scanners, Point spread functions, Wavefronts, Modulation transfer functions, Digital filtering, Direct methods, Filtering (signal processing), Image restoration, Charge-coupled devices, Image processing

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Proceedings Article | 28 November 2007 Paper

Paper

Design of objective lenses to extend the depth of field based on wavefront coding

Tingyu Zhao, Zi Ye, Wenzi Zhang, Weiwei Huang, Feihong Yu

Proceedings Volume 6834, 683414 (2007) https://doi.org/10.1117/12.756051

KEYWORDS: Objectives, Lenses, Wavefronts, Modulation transfer functions, Microscopes, Lens design, Point spread functions, Image processing, Charge-coupled devices, Chromatic aberrations

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Proceedings Article | 28 November 2007 Paper

Paper

Strehl ratio analysis for the wavefront coding system

Wenzi Zhang, Zi Ye, Tingyu Zhao, Feihong Yu

Proceedings Volume 6834, 683415 (2007) https://doi.org/10.1117/12.756105

KEYWORDS: Wavefronts, Imaging systems, Modulation transfer functions, Point spread functions, Optical imaging, Optical transfer functions, Solids, Image restoration, Spatial frequencies, Optical instrument design

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Proceedings Article | 28 November 2007 Paper

Paper

The optimal design of TIR lens for improving LED illumination uniformity and efficiency

Yankun Zhen, Zhenan Jia, Wenzi Zhang

Proceedings Volume 6834, 68342K (2007) https://doi.org/10.1117/12.756101

KEYWORDS: Light emitting diodes, Lens design, LED lighting, Spatial light modulators, Projection systems, Optical components, Beam shaping, Light sources, Optimization (mathematics), Reflection

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Proceedings Article | 28 November 2007 Paper

Paper

Microscope auto-focusing system with the self-adaptive mountain-climbing search method based on PC control

Liqun Xu, Zi Ye, Jianping Wu, Xinxin Yan, Feihong Yu

Proceedings Volume 6834, 68342E (2007) https://doi.org/10.1117/12.755746

KEYWORDS: Microscopes, Control systems, Digital cameras, Objectives, Computing systems, Process control, Image processing, Digital image processing, Imaging systems, Video processing

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SPIE Journal Paper | 1 May 2007

Ultrahigh-performance lamp illumination system with compound parabolic retroreflector for a single liquid-crystal-on-silicon panel display

Yankun Zhen, Zi Ye, Feihong Yu

OE, Vol. 46, Issue 05, 054001, (May 2007) https://doi.org/10.1117/12.10.1117/1.2736310

KEYWORDS: Liquid crystal on silicon, Lamps, Retroreflectors, Projection systems, Light sources, Imaging systems, Optical engineering, Light, Reflectors, Illumination engineering

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Proceedings Article | 1 February 2006 Paper

Paper

Characteristic-analysis of optical low pass filter used in digital camera

Tingyu Zhao, Rong Wang, Yuling Liu, Feihong Yu

Proceedings Volume 6034, 60340N (2006) https://doi.org/10.1117/12.668107

KEYWORDS: Crystals, Linear filtering, Nonlinear crystals, Digital cameras, Charge-coupled devices, Laser crystals, Quartz, Refractive index, Imaging systems, Calcite

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Proceedings Article | 26 January 2006 Paper

Paper

Direct design of a polarization interference filter by adaptive simulated annealing algorithm

Yuling Liu, Yanping Chen, Jingyi Xiong, Yingbo He, Feihong Yu

Proceedings Volume 6030, 60300S (2006) https://doi.org/10.1117/12.667641

KEYWORDS: Algorithms, Crystals, Optical filters, Polarization, Wave plates, Interference filters, Annealing, Linear filtering, Projection systems, Remote sensing

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Proceedings Article | 11 January 2006 Paper

Paper

New illumination patterns in microscopes

Chunfang Ye, Yuling Liu, Feihong Yu

Proceedings Volume 6033, 60330L (2006) https://doi.org/10.1117/12.668076

KEYWORDS: Light emitting diodes, Microscopes, Light sources, Lamps, Light, Geometrical optics, Illumination engineering, Optical engineering, Optical microscopes, Halogens

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Proceedings Article | 9 December 2005 Paper

Paper

Determining thin film thickness characterization using adaptive simulated annealing algorithm

Yanping Chen, Yuling Liu, Peng Liu, Yingbo He, Feihong Yu

Proceedings Volume 6024, 602416 (2005) https://doi.org/10.1117/12.666850

KEYWORDS: Thin films, Algorithms, Evolutionary algorithms, Refractive index, Spectroscopy, Optimization (mathematics), Reflectance spectroscopy, Annealing, Reflection, Optical engineering

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Proceedings Article | 8 February 2005 Paper

Paper

Study on color control system of digital photofinishing

Baozhong Mu, Feihong Yu

Proceedings Volume 5637, (2005) https://doi.org/10.1117/12.572134

KEYWORDS: Control systems, Printing, Digital photography, Neural networks, Color difference, RGB color model, CRTs, Color reproduction, Error analysis, Skin

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SPIE Journal Paper | 1 May 2004

Direct design of a polarization interference filter by genetic algorithm

Jingyi Xiong, Feihong Yu, Yinbo He

OE, Vol. 43, Issue 05, (May 2004) https://doi.org/10.1117/12.10.1117/1.1688387

KEYWORDS: Crystals, Neodymium, Genetic algorithms, Polarization, Interference filters, Linear filtering, Thin films, Projection systems, Optical networks, Polarizers

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SPIE Journal Paper | 1 August 2003

Study on optical finite impulse response filter

Ying Zhou, Guangjie Zeng, Feihong Yu, Hoi Sing Kwok

OE, Vol. 42, Issue 08, (August 2003) https://doi.org/10.1117/12.10.1117/1.1586289

KEYWORDS: Finite impulse response filters, Optical filters, Wave plates, Filtering (signal processing), Crystals, Tunable filters, Fourier transforms, Optical engineering, Image filtering, Electronic filtering

Proceedings Article | 20 September 2002 Paper

Paper

Design of polarization interference filter used for LCOS projection display

Yinbo He, Jinyi Xiong, Guozhong Wu, Zhaofeng Cen, Feihong Yu, HoiSing Kwok

Proceedings Volume 4919, (2002) https://doi.org/10.1117/12.470955

KEYWORDS: Wave plates, Liquid crystal on silicon, Polarization, Interference filters, Genetic algorithms, Optical filters, Projection systems, Polarizers, LCDs, Optical networks

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Proceedings Article | 16 September 2002 Paper

Paper

Nonscanning selective-illumination optical sectioning microscope theory

Jinyi Xiong, Ying Zhou, Guozhong Wu, Zhaofeng Cen, Feihong Yu

Proceedings Volume 4929, (2002) https://doi.org/10.1117/12.483198

KEYWORDS: Microscopes, Modulation, Confocal microscopy, Spatial frequencies, Image processing, Imaging systems, Optical transfer functions, Atrial fibrillation, Luminescence, Transmittance

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Proceedings Article | 16 September 2002 Paper

Paper

New analytical method for design of PIF used in color separation/combination optical engine for LCOS display

Jinyi Xiong, Ying Zhou, Guozhong Wu, Zhaofeng Cen, Feihong Yu, HoiSing Kwok

Proceedings Volume 4929, (2002) https://doi.org/10.1117/12.483199

KEYWORDS: Crystals, Testing and analysis, Polarizers, Liquid crystal on silicon, Thin film coatings, Polarization, Interference filters, Optical networks, Thin films, Wave plates

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Proceedings Article | 30 August 2002 Paper

Paper

Optical FIR filter based on crystal birefringence: theory and experimental investigation

Ying Zhou, Guozhong Wu, Feihong Yu, HoiSing Kwok

Proceedings Volume 4924, (2002) https://doi.org/10.1117/12.481492

KEYWORDS: Optical filters, Finite impulse response filters, Error analysis, Crystals, Birefringence, Cadmium, Polarizers, Tolerancing, Wave plates, Spectroscopy

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SPIE Journal Paper | 1 November 2001

Interactive finite-difference method for calculating the distribution of the liquid crystal director

Qian Wang, Sailing He, Feihong Yu, Nairong Huang

OE, Vol. 40, Issue 11, (November 2001) https://doi.org/10.1117/12.10.1117/1.1411974

KEYWORDS: Liquid crystals, Finite difference methods, LCDs, Optical instrument design, Iterative methods, Optical engineering, Electromagnetism, Analytical research, Numerical analysis, Algorithms

SPIE Journal Paper | 1 October 1996

Optical modified signed-digit addition module based on Boolean polarization-encoded logic algebra

Bin Wang, Feihong Yu, Xu Liu, Peifu Gu, Jinfa Tang

OE, Vol. 35, Issue 10, (October 1996) https://doi.org/10.1117/12.10.1117/1.600983

KEYWORDS: Transform theory, Logic, Polarization, LCDs, Logic devices, Polarizers, Optical engineering, Signal detection, Computer programming, Beam splitters

Proceedings Article | 30 September 1996 Paper

Paper

New extended Jones matrix method for twisted nematic liquid crystal displays at oblique incidence

Feihong Yu, Jun Chen, Shu-Tuen Tang, HoiSing Kwok

Proceedings Volume 2892, (1996) https://doi.org/10.1117/12.253335

KEYWORDS: LCDs, Liquid crystals, Refraction, Interfaces, Optical properties, Refractive index, Polarizers, Transmittance, Electro optical modeling, Fabry–Perot interferometers

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Showing 5 of 70 publications

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