Prof. Xia Wang Profile

Prof. Xia Wang

at Beijing Institute of Technology

SPIE Involvement:

Author

Publications (43)

Proceedings Article | 16 September 2024 Paper

Land surface temperature retrieval method for measured data from unmanned aerial vehicle (UAV) mid-wave thermometry thermal imaging cameras (MWTIC)

Yuqing Deng, Xia Wang, Qiyang Sun, Fengwen Mi, Yi Wang, Yu Liu, Guangzhen Cui

Proceedings Volume 13255, 1325505 (2024) https://doi.org/10.1117/12.3039899

KEYWORDS: Unmanned aerial vehicles, Temperature metrology, Thermography, Thermal imaging cameras, Infrared radiation, Image processing, Infrared imaging, Data acquisition, Atmospheric sensing, Surface air temperature

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Proceedings Article | 30 April 2024 Paper

Frequency-aware natural camouflage object segmentation

Qiyang Sun, Xia Wang, Ronghua Su, Yuqing Deng

Proceedings Volume 13156, 131560U (2024) https://doi.org/10.1117/12.3016580

KEYWORDS: Image segmentation, Camouflage, Image fusion, RGB color model, Feature extraction, Education and training, Transformers, Image enhancement, Target detection, Tunable filters

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Natural camouflage is a crucial defense mechanism for species to ensure their survival. The most common strategies used in natural camouflage are background matching, environmental texture mimicry, and disruptive coloration. The Camouflage Object Segmentation (COS) task focuses on visually segmenting camouflaged objects that blend seamlessly with the surrounding background. This task poses a greater challenge than the Salient Object Segmentation (SOS) task. Currently, most disguised target segmentation models achieve their tasks by enhancing the texture and contour features of the target, fusing various hierarchical image features, or incorporating frequency domain information of the target. However, these existing models are built on a single framework that uses image context aggregation strategies to segment disguised objects. This approach overlooks the rich and diverse texture features in both spatial and frequency domains for targets. To address this issue, we introduce the cue of frequency components information as an auxiliary enhancement method for images. We also design a dual-stream encoder to process and fuse texture features from both RGB images and frequency perspective images, in order to refine the multi-level features of disguised target textures and contour segmentation. Specifically, we propose a frequency-aware aggregation module that fuses multi-scale features of target textures from a frequency perspective, which includes three different scales of offline discrete cosine transform modules and an image fusion module. A dual-stream encoder is designed to explore global and local texture expressions of targets in both spatial and frequency domains, that multi-layer in spatial domain encoder obtains frequency domain features as masks from the corresponding layers of frequency domain encoder. Additionally, a learnable transpose convolution decoder is used to enhance contour capture capability. Experimental results demonstrate that our model achieves state-of-the-art segmentation accuracy.

Proceedings Article | 30 April 2024 Paper

Multi-camera array bionic compound eye target recognition and ranging system

Qiwei Liu, Xia Wang, Zhekai Bian

Proceedings Volume 13153, 131530F (2024) https://doi.org/10.1117/12.3014658

KEYWORDS: Ranging, Target recognition, Biomimetics, Imaging systems, Cameras, Image processing

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Proceedings Article | 15 February 2022 Paper

Fusion method of infrared-polarization images based on common and unique salient feature

Zihang Su, Xia Wang, Jiabi Zhao, Weiqi Jin

Proceedings Volume 12166, 121661J (2022) https://doi.org/10.1117/12.2611774

KEYWORDS: Image fusion, Infrared radiation, Infrared imaging, Image enhancement, Polarization

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Proceedings Article | 24 November 2021 Paper

Underwater active polarization imaging algorithm based on low-rank sparse decomposition

Xiaohuan Li, Xia Wang, Zihang Su

Proceedings Volume 12065, 120650O (2021) https://doi.org/10.1117/12.2603863

KEYWORDS: Polarization, Underwater imaging, Scattering, Light scattering, Detection and tracking algorithms, Image processing, Image quality, Submerged target modeling, Target detection, Optical imaging

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Proceedings Article | 24 November 2021 Paper

High-quality reconstruction in non-line-of-sight imaging via transient multiplied photon count data

Kai Ma, Xia Wang, Si He, Weiqi Jin

Proceedings Volume 12061, 1206102 (2021) https://doi.org/10.1117/12.2599678

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Proceedings Article | 24 November 2021 Paper

Spectral emissivity measurement based on radiation at multiple temperatures

Jingjing Zhou, Xia Wang, Xiaopeng Hao, Jian Song, Chenyu Xie, Zhao Xing

Proceedings Volume 12061, 120611J (2021) https://doi.org/10.1117/12.2606784

KEYWORDS: Black bodies, Infrared radiation, Remote sensing, Computer simulations, Spectroscopy, Radiometry, Emission spectroscopy

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SPIE Journal Paper | 25 March 2021

Method to improve the accuracy of depth images based on differential entropy

YuJie Fang, Xia Wang, ZhiBin Sun, BingHua Su, JunWen Xue

OE, Vol. 60, Issue 03, 033105, (March 2021) https://doi.org/10.1117/12.10.1117/1.OE.60.3.033105

KEYWORDS: Time of flight cameras, Reflectivity, Distortion, Sensors, Optical engineering, Imaging systems, Image processing, Cameras, Data acquisition, Distance measurement

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Proceedings Article | 12 March 2021 Paper

The introduction to ICCD or ICMOS performance evaluation method

Shi-long Li, Feng Shi, Xia Wang

Proceedings Volume 11763, 117637N (2021) https://doi.org/10.1117/12.2587460

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Proceedings Article | 5 November 2020 Paper

Salient object detection via multi-spectral co-connectivity and collaborative graph ranking

Xin Wang, Xia Wang, Xin Zhang

Proceedings Volume 11563, 1156303 (2020) https://doi.org/10.1117/12.2575724

KEYWORDS: RGB color model, Thermography, Infrared radiation, Image segmentation, Control systems, Infrared imaging, Visible radiation, Machine vision, Computer vision technology, Detection and tracking algorithms, Image fusion

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Proceedings Article | 12 March 2020 Paper

A compact visible bionic compound eyes system based on micro-surface fiber faceplate

Jiaan Xue, Su Qiu, Xia Wang, Weiqi Jin

Proceedings Volume 11438, 114380B (2020) https://doi.org/10.1117/12.2541912

KEYWORDS: Imaging systems, Biomimetics, Target detection, Sensors, Super resolution, Multispectral imaging, Navigation systems, Polarization, Optical sensors, Complex systems

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Proceedings Article | 9 November 2018 Paper

A small dual-band (LWIR/VIS) color video camera with common optical path and its real-time fusion method

Xiaojie Zhu, Weiqi Jin, Li Li, Xia Wang, Su Qiu, Yixin Guo

Proceedings Volume 10826, 108260Y (2018) https://doi.org/10.1117/12.2500711

KEYWORDS: Video, Cameras, Infrared imaging, Image fusion, Video processing, Thermography, Image processing, Real time image processing

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Proceedings Article | 12 January 2018 Paper

Minimum resolvable power contrast model

Shuai Qian, Xia Wang, Jingjing Zhou

Proceedings Volume 10620, 106200R (2018) https://doi.org/10.1117/12.2296377

KEYWORDS: Signal to noise ratio, Imaging systems, Signal detection, Modulation transfer functions, Interference (communication), Signal processing, Target detection, Sensors, Image processing

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Proceedings Article | 24 October 2017 Paper

Noise properties of the calculated linear polarization image

Jian'an Liang, Xia Wang, Si He, Weiqi Jin, Xiaotian Lu

Proceedings Volume 10462, 104622S (2017) https://doi.org/10.1117/12.2284931

KEYWORDS: Polarization

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Proceedings Article | 24 October 2017 Paper

Using a photograph containing the sun to measure the rotation and slope of terrain

Xia Wang, Zimu Wu, Fei Chen, Weiqi Jin

Proceedings Volume 10458, 1045817 (2017) https://doi.org/10.1117/12.2285009

KEYWORDS: Photography, Sun

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Proceedings Article | 14 December 2015 Paper

A parallel multiple path tracing method based on OptiX for infrared image generation

Hao Wang, Xia Wang, Li Liu, Teng Long, Zimu Wu

Proceedings Volume 9812, 98121E (2015) https://doi.org/10.1117/12.2230461

KEYWORDS: Infrared radiation, Ray tracing, Infrared imaging, Monte Carlo methods, Bidirectional reflectance transmission function, Scene simulation, 3D modeling, Infrared technology, Ions, Sensors

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SPIE Journal Paper | 6 July 2015

Natural scene temperature field calculation and infrared radiation simulation based on OptiX

Hao Wang, Xia Wang, Li Liu, Teng Long

OE, Vol. 54, Issue 07, 073101, (July 2015) https://doi.org/10.1117/12.10.1117/1.OE.54.7.073101

KEYWORDS: Infrared radiation, Thermal modeling, Scene simulation, Thermography, Heat flux, Infrared imaging, Sun, Data modeling, Optical engineering, Convection

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Proceedings Article | 24 November 2014 Paper

Wide-band gas leak imaging detection system using UFPA

Wei-qi Jin, Jia-kun Li, Xiong Dun, Minglei Jin, Xia Wang

Proceedings Volume 9301, 930102 (2014) https://doi.org/10.1117/12.2070654

KEYWORDS: Imaging systems, Sensors, Infrared imaging, Infrared sensors, Digital imaging, Linear filtering, Gases, Long wavelength infrared, Detection and tracking algorithms, Channel projecting optics

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The leakage of toxic or hazardous gases not only pollutes the environment, but also threatens people's lives and property safety. Many countries attach great importance to the rapid and effective gas leak detection technology and instrument development. However, the gas leak imaging detection systems currently existing are generally limited to a narrow-band in Medium Wavelength Infrared (MWIR) or Long Wavelength Infrared (LWIR) cooled focal plane imaging, which is difficult to detect the common kinds of the leaking gases. Besides the costly cooled focal plane array is utilized, the application promotion is severely limited. To address this issue, a wide-band gas leak IR imaging detection system using Uncooled Focal Plane Array (UFPA) detector is proposed, which is composed of wide-band IR optical lens, sub-band filters and switching device, wide-band UFPA detector, video processing and system control circuit. A wide-band (3µm~12µm) UFPA detector is obtained by replacing the protection window and optimizing the structural parameters of the detector. A large relative aperture (F#=0.75) wide-band (3μm~12μm) multispectral IR lens is developed by using the focus compensation method, which combining the thickness of the narrow-band filters. The gas leak IR image quality and the detection sensitivity are improved by using the IR image Non-Uniformity Correction (NUC) technology and Digital Detail Enhancement (DDE) technology. The wide-band gas leak IR imaging detection system using UFPA detector takes full advantage of the wide-band (MWIR&LWIR) response characteristic of the UFPA detector and the digital image processing technology to provide the resulting gas leak video easy to be observed for the human eyes. Many kinds of gases, which are not visible to the naked eyes, can be sensitively detected and visualized. The designed system has many commendable advantages, such as scanning a wide range simultaneously, locating the leaking source quickly, visualizing the gas plume intuitively and so on. The simulation experiment shows that the gas IR imaging detection has great advantages and widely promotion space compared with the traditional techniques, such as point-contact or line-contactless detection.

Proceedings Article | 21 February 2014 Paper

Progress in development of imaging polarimeter for Stokes parameter measurement

Runqiu Xia, Xia Wang, Weiqi Jin, Jin Liu

Proceedings Volume 9142, 914211 (2014) https://doi.org/10.1117/12.2057373

KEYWORDS: Polarimetry, Polarization, Imaging systems, Wave plates, Sensors, Objectives, Visible radiation, Optical filters, Liquid crystals, Control systems

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Proceedings Article | 11 September 2013 Paper

Detector MTF based micro-scanning image reconstruction

Lu Lu, Wei-qi Jin, Xiong Dun, Xia Wang

Proceedings Volume 8907, 890706 (2013) https://doi.org/10.1117/12.2034055

KEYWORDS: Sensors, Reconstruction algorithms, Image processing, Modulation transfer functions, Image filtering, Image restoration, Detection and tracking algorithms, Image sensors, Image resolution, Linear filtering

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Proceedings Article | 16 August 2013 Paper

Influence of range-gated intensifiers on underwater imaging system SNR

Xia Wang, Ling Hu, Qiang Zhi, Zhen-yue Chen, Wei-qi Jin

Proceedings Volume 8912, 89120E (2013) https://doi.org/10.1117/12.2032840

KEYWORDS: Signal to noise ratio, Imaging systems, Modulation transfer functions, Underwater imaging, Scattering, Image intensifiers, Submerged target modeling, Light scattering, Laser scattering, Charge-coupled devices

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Range-gated technology has been a hot research field in recent years due to its high effective back scattering eliminating. As a result, it can enhance the contrast between a target and its background and extent the working distance of the imaging system. The underwater imaging system is required to have the ability to image in low light level conditions, as well as the ability to eliminate the back scattering effect, which means that the receiver has to be high-speed external trigger function, high resolution, high sensitivity, low noise, higher gain dynamic range. When it comes to an intensifier, the noise characteristics directly restrict the observation effect and range of the imaging system. The background noise may decrease the image contrast and sharpness, even covering the signal making it impossible to recognize the target. So it is quite important to investigate the noise characteristics of intensifiers. SNR is an important parameter reflecting the noise features of a system. Through the use of underwater laser range-gated imaging prediction model, and according to the linear SNR system theory, the gated imaging noise performance of the present market adopted super second generation and generation Ⅲ intensifiers were theoretically analyzed. Based on the active laser underwater range-gated imaging model, the effect to the system by gated intensifiers and the relationship between the system SNR and MTF were studied. Through theoretical and simulation analysis to the image intensifier background noise and SNR, the different influence on system SNR by super second generation and generation Ⅲ ICCD was obtained. Range-gated system SNR formula was put forward, and compared the different effect influence on the system by using two kind of ICCDs was compared. According to the matlab simulation, a detailed analysis was carried out theoretically. All the work in this paper lays a theoretical foundation to further eliminating back scattering effect, improving image SNR, designing and manufacturing higher performance underwater range-gated imaging systems.

Proceedings Article | 15 October 2012 Paper

Study of atmospheric effects on infrared polarization imaging system based on polarized Monte Carlo method

Zhenyue Chen, Xia Wang, Mingyang Zhang, Runqiu Xia, Weiqi Jin

Proceedings Volume 8512, 85120H (2012) https://doi.org/10.1117/12.929224

KEYWORDS: Scattering, Polarization, Atmospheric particles, Light scattering, Monte Carlo methods, Photons, Mie scattering, Atmospheric propagation, Atmospheric modeling, Infrared imaging

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Proceedings Article | 15 October 2012 Paper

Color reconstruction of medium infrared polarization images based on HSV and wavelet packet transform

Weili Chen, Shuhua Wang, Weiqi Jin, Xia Wang

Proceedings Volume 8420, 84201E (2012) https://doi.org/10.1117/12.977930

KEYWORDS: Image fusion, Polarization, Infrared imaging, Infrared radiation, RGB color model, Wavelets, Infrared technology, Infrared detectors, Imaging technologies, Imaging systems

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Proceedings Article | 20 August 2011 Paper

A phase unwrapping algorithm based on Branch cuts for living cell's interference pattern

Meng Wang, Wang Xia, Greg Schmidt, Duncan Moore, James McGrath

Proceedings Volume 8192, 819214 (2011) https://doi.org/10.1117/12.899585

KEYWORDS: 3D modeling, Interferometers, Microscopes, Optoelectronics, Connective tissue, Image processing, 3D image processing, Biosensing, Phase shifts, Refractive index

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Proceedings Article | 2 September 2009 Paper

Speckle noise suppression of range gated underwater imaging system

Hailan Li, Xia Wang, Tingzhu Bai, Weiqi Jin, Youwei Huang, Kun Ding

Proceedings Volume 7443, 74432A (2009) https://doi.org/10.1117/12.831994

KEYWORDS: Speckle, Imaging systems, Image filtering, Optical filters, Underwater imaging, Speckle pattern, Light sources, Digital filtering, Linear filtering, Electronic filtering

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Proceedings Article | 2 September 2009 Paper

Image enhancement of range gated underwater imaging system based on least square error

Hailan Li, Xia Wang, Tingzhu Bai, Weiqi Jin, Xiao Zhang, Lin Zhao

Proceedings Volume 7443, 74432B (2009) https://doi.org/10.1117/12.832187

KEYWORDS: Image enhancement, Imaging systems, Image processing, Image quality, Image segmentation, Laser imaging, Signal to noise ratio, Underwater imaging, Laser systems engineering, Computer simulations

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Proceedings Article | 28 January 2009 Paper

Nonuniformly illuminated image enhancement based on range-gated underwater imaging system

Hailan Li, Xia Wang, Tingzhu Bai, Weiqi Jin, Youwei Huang, Kun Ding

Proceedings Volume 7156, 71563E (2009) https://doi.org/10.1117/12.812026

KEYWORDS: Imaging systems, Image processing, Image enhancement, Eye models, Underwater imaging, Visual process modeling, Image quality, Laser imaging, Pulsed laser operation, Visualization

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Proceedings Article | 12 July 2008 Paper

Optimal analysis for segmented mirror capture and alignment in space optics system

Xiaofang Zhang, Xin Yu, Xia Wang, Lei Zhao

Proceedings Volume 7010, 70104G (2008) https://doi.org/10.1117/12.787723

KEYWORDS: Image segmentation, Segmented mirrors, Mirrors, Error analysis, Actuators, Optical alignment, Zemax, Sensors, Astronomical imaging, Image processing

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Proceedings Article | 3 March 2008 Paper

Spectrum matching on the test of luminance gain of image intensifier

Xia Wang, Weiqi Jin, Zhiyun Gao, Zhihong Wang

Proceedings Volume 6621, 66211Y (2008) https://doi.org/10.1117/12.790944

KEYWORDS: Image intensifiers, Luminescence, Light sources, Night vision, Imaging systems, Luminous efficiency, Visibility, Imaging devices, System integration, Process control

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Proceedings Article | 3 March 2008 Paper

Range-gated underwater laser imaging system based on intensified gate imaging technology

Weiqi Jin, Fengmei Cao, Xia Wang, Guangrong Liu, Youwei Huang, Huaichuan Qi, Fei Shen

Proceedings Volume 6621, 66210L (2008) https://doi.org/10.1117/12.790665

KEYWORDS: Imaging systems, Laser imaging, Pulsed laser operation, Laser systems engineering, CCD cameras, Cameras, Control systems, Power supplies, High power lasers, Backscatter

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Proceedings Article | 3 March 2008 Paper

Thermal microscope imaging system for semiconductor device and IC invalidation analysis

Meijing Gao, Weiqi Jin, Yinan Chen, Xia Wang

Proceedings Volume 6621, 662117 (2008) https://doi.org/10.1117/12.790776

KEYWORDS: Microscopes, Thermography, Infrared radiation, Infrared imaging, Semiconductors, Imaging systems, Nonuniformity corrections, Sensors, Staring arrays, Image processing

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Proceedings Article | 22 February 2008 Paper

Optimal scanning function for capturing segmented mirror in space optics system

Xiaofang Zhang, Xin Yu, Xia Wang, Jiaguo Liu, Kui Yang

Proceedings Volume 6622, 662214 (2008) https://doi.org/10.1117/12.790820

KEYWORDS: Segmented mirrors, Image segmentation, Mirrors, Sensors, Astronomical imaging, Error analysis, Optical scanning systems, Actuators, Zemax, Space mirrors

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Proceedings Article | 19 May 2006 Paper

Research on digitally integrated test system for performance evaluation of image intensifier and intensified CCD

Xia Wang, Weiqi Jin, Zhiyun Gao, Zhihong Wang, Tingzhu Bai

Proceedings Volume 6150, 61500S (2006) https://doi.org/10.1117/12.678099

KEYWORDS: Image intensifiers, System integration, Modulation transfer functions, Imaging systems, Charge-coupled devices, Spatial light modulators, Image resolution, Light sources, Image processing, Night vision

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Proceedings Article | 19 May 2006 Paper

Thermal temperature measurement and dynamic analysis based on USB 2.0

Lingxue Wang, Shiming Shi, Weiqi Jin, Kun Ding, Yuanmeng Zhao, Xia Wang

Proceedings Volume 6150, 61500P (2006) https://doi.org/10.1117/12.678092

KEYWORDS: Thermography, Video, Temperature metrology, Image analysis, Databases, Local area networks, Computer programming, Human-machine interfaces, Power supplies, Interfaces

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Proceedings Article | 16 May 2006 Paper

A new nonuniformity correction algorithm for infrared line scanners

Jing Sui, Wei-qi Jin, Li-quan Dong, Xia Wang

Proceedings Volume 6207, 62070Y (2006) https://doi.org/10.1117/12.669102

KEYWORDS: Nonuniformity corrections, Digital filtering, Infrared imaging, Sensors, Infrared radiation, Liquid crystals, Staring arrays, Neural networks, Scanners, Neurons

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Proceedings Article | 2 February 2006 Paper

Research on the 3D image restoration of the wide-field microscope based on the MPMAP

Hua Chen, Weiqi Jin, Binghua Su, Xia Wang, Tingzhu Bai

Proceedings Volume 6026, 60260L (2006) https://doi.org/10.1117/12.667140

KEYWORDS: Image restoration, 3D image processing, Signal to noise ratio, 3D image restoration, Microscopes, Image resolution, Image processing, Super resolution, Deconvolution, Biological research

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Proceedings Article | 2 February 2006 Paper

The simulation study on point spread function and thick specimen imaging of optical microscope imaging system

Jinli Yao, Xia Wang, Weiqi Jin, Hua Chen, Binghua Su

Proceedings Volume 6026, 60260M (2006) https://doi.org/10.1117/12.667142

KEYWORDS: Point spread functions, Imaging systems, Optical microscopes, Optical transfer functions, Microscopes, 3D image processing, Image processing, Distortion, Optical imaging, Confocal microscopy

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Proceedings Article | 20 January 2005 Paper

Model of backscattering light and signal light for atmospheric range-gated imaging systems

Li Li, Zhiyun Gao, Xia Wang, Weiqi Jin, Xinjun Guo

Proceedings Volume 5633, (2005) https://doi.org/10.1117/12.569852

KEYWORDS: Backscatter, Atmospheric modeling, Pulsed laser operation, Imaging systems, Systems modeling, Sensors, Receivers, Atmospheric optics, Lead, Atmospheric propagation

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Proceedings Article | 20 September 2002 Paper

Calibration method of three-band infrared integrated radiometer

Xia Wang, Zhiyun Gao, Jianyong Zhang, Weiqi Jin

Proceedings Volume 4927, (2002) https://doi.org/10.1117/12.471417

KEYWORDS: Calibration, Black bodies, Temperature metrology, Sensors, Radiometry, Infrared radiation, Signal processing, Atmospheric sensing, Transmittance, Infrared photography

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Proceedings Article | 20 September 2002 Paper

Modulate chopper technique used in pyroelectric uncooled focal plany array thermal imager

Yuqing He, Weiqi Jin, Guangrong Liu, Zhiyun Gao, Xia Wang, Lingxue Wang

Proceedings Volume 4919, (2002) https://doi.org/10.1117/12.471869

KEYWORDS: Sensors, Modulation, Thermography, Imaging systems, Pyroelectric liquid crystals, Staring arrays, Signal detection, Infrared radiation, Image sensors, Infrared imaging

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Proceedings Article | 13 September 2002 Paper

Theoretical study of chromatic contrast sensitivity function (CCSF)

Jianyong Zhang, Weiqi Jin, Weijie Hu, Xia Wang

Proceedings Volume 4922, (2002) https://doi.org/10.1117/12.483117

KEYWORDS: Contrast sensitivity, Colorimetry, Composites, Color vision, Modulation transfer functions, Spatial frequencies, Human vision and color perception, Visual system, Visual process modeling, Image fusion

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Proceedings Article | 30 August 2002 Paper

Scenery's temperature image based on two-band uncooled focal plane array thermal images

Yuqing He, Weiqi Jin, Xia Wang, Zhiyun Gao, Lingxue Wang, Guangrong Liu

Proceedings Volume 4925, (2002) https://doi.org/10.1117/12.481631

KEYWORDS: Sensors, Thermography, Image fusion, Imaging systems, Temperature metrology, Optical filters, Image processing, Image filtering, Staring arrays, Signal processing

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Proceedings Article | 25 September 2001 Paper

New band model used to calculate infrared absorption of CO2, CO, H2O, and CH4

Xia Wang, Weiqi Jin, Rulin Wang

Proceedings Volume 4548, (2001) https://doi.org/10.1117/12.441423

KEYWORDS: Absorption, Gases, Infrared radiation, Carbon monoxide, Thermal modeling, Data modeling, Thermography, Carbon dioxide, Mining, Spectral models

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Showing 5 of 43 publications

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