Dr. Jiakun Li Profile

Dr. Jiakun Li

PhD student at Bejing Institute of Technology

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Publications (7)

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 | 30 November 2012 Paper

A visible/infrared gray image fusion algorithm based on the YUV color transformation

Jin Zhu, Weiqi Jin, Jiakun Li, Li Li

Proceedings Volume 8558, 855814 (2012) https://doi.org/10.1117/12.2001309

KEYWORDS: Image fusion, Infrared imaging, Infrared radiation, Visible radiation, Detection and tracking algorithms, Thermography, Digital signal processing, Wavelets, Image processing, Information fusion

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Proceedings Article | 18 May 2012 Paper

Spatial concentration distribution model for short-range continuous gas leakage of small amount

Meirong Wang, Lingxue Wang, Jiakun Li, Yunting Long, Yue Gao

Proceedings Volume 8354, 835414 (2012) https://doi.org/10.1117/12.920569

KEYWORDS: Data modeling, Diffusion, Imaging systems, Sensors, Infrared imaging, 3D modeling, Infrared radiation, Thermal modeling, Atmospheric modeling, Systems modeling

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Proceedings Article | 18 May 2012 Paper

Gas imaging detectivity model combining leakage spot size and range

Jiakun Li, Lingxue Wang, Meirong Wang, Yue Gao, Weiqi Jin

Proceedings Volume 8354, 835415 (2012) https://doi.org/10.1117/12.920664

KEYWORDS: Thermography, Atmospheric modeling, Clouds, Sensors, Imaging systems, Thermal modeling, Signal to noise ratio, Standoff detection, Black bodies, Solar radiation models

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Proceedings Article | 4 June 2011 Paper

Gas image enhancement based on adaptive time-domain filtering and morphology

Changxing Zhang, Lingxue Wang, Jiakun Li, Yunting Long, Bei Zhang

Proceedings Volume 8018, 80181X (2011) https://doi.org/10.1117/12.886588

KEYWORDS: Digital filtering, Image filtering, Thermography, Image enhancement, Infrared imaging, Infrared radiation, Optical filters, Image processing, Diffusion, Image segmentation

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Proceedings Article | 26 May 2011 Paper

Gas cloud infrared image enhancement based on anisotropic diffusion

Jiakun Li, Lingxue Wang, Changxing Zhang, Yunting Long, Bei Zhang

Proceedings Volume 8024, 80240X (2011) https://doi.org/10.1117/12.886589

KEYWORDS: Clouds, Infrared imaging, Infrared radiation, Diffusion, Image enhancement, Anisotropic diffusion, Image processing, Image segmentation, Thermography, Infrared sensors

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Proceedings Article | 10 May 2011 Paper

Detectivity of gas leakage based on electromagnetic radiation transfer

Yunting Long, Lingxue Wang, Jiakun Li, Changxing Zhang, Bei Zhang

Proceedings Volume 8013, 80130D (2011) https://doi.org/10.1117/12.886596

KEYWORDS: Thermography, Imaging systems, Carbon dioxide, Absorption, Mid-IR, Infrared imaging, Infrared radiation, Black bodies, Thermal modeling, Radiative transfer

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Showing 5 of 7 publications

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