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Research on pedestrian escape route without visibility based on Markov chain model

Xiaoping ZHENG, Lijuan DU, Hongjiang WANG,

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 3,   Pages 283-289 doi: 10.1007/s11705-009-0272-8

Abstract: It is a pioneering work to use a Markov chain model to study the pedestrian escape route without visibility

Keywords: pioneering     direction     spatial-grid     realistic     transition characteristic    

Turbidity-adaptive underwater image enhancement method using image fusion

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 3, doi: 10.1007/s11465-021-0669-8

Abstract: Clear, correct imaging is a prerequisite for underwater operations. In real freshwater environment including rivers and lakes, the water bodies are usually turbid and dynamic, which brings extra troubles to quality of imaging due to color deviation and suspended particulate. Most of the existing underwater imaging methods focus on relatively clear underwater environment, it is uncertain that if those methods can work well in turbid and dynamic underwater environments. In this paper, we propose a turbidity-adaptive underwater image enhancement method. To deal with attenuation and scattering of varying degree, the turbidity is detected by the histogram of images. Based on the detection result, different image enhancement strategies are designed to deal with the problem of color deviation and blurring. The proposed method is verified by an underwater image dataset captured in real underwater environment. The result is evaluated by image metrics including structure similarity index measure, underwater color image quality evaluation metric, and speeded-up robust features. Test results exhibit that the method can correct the color deviation and improve the quality of underwater images.

Keywords: turbidity     underwater image enhancement     image fusion     underwater robots     visibility    

Discussions in prediction and precaution about haze

Zhang Kui

Strategic Study of Chinese Academy of Engineering 2015, Volume 17, Issue 1,   Pages 103-113

Abstract:

Aimed at the harmfulness of low visibility weather, using digital information method found the relationship

Keywords: visibility; haze; digital information prediction method; precaution    

Anon-stationary channelmodel for 5Gmassive MIMOsystems Article

Jian-qiao CHEN, Zhi ZHANG, Tian TANG, Yu-zhen HUANG

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 12,   Pages 2101-2110 doi: 10.1631/FITEE.1700028

Abstract: Additionally, a novel visibility region method is proposed to capture the non-stationary properties of

Keywords: Massive MIMO     Spherical wave-front assumption     Non-stationary property     Birth-death process     Visibility    

Title Author Date Type Operation

Research on pedestrian escape route without visibility based on Markov chain model

Xiaoping ZHENG, Lijuan DU, Hongjiang WANG,

Journal Article

Turbidity-adaptive underwater image enhancement method using image fusion

Journal Article

Discussions in prediction and precaution about haze

Zhang Kui

Journal Article

Anon-stationary channelmodel for 5Gmassive MIMOsystems

Jian-qiao CHEN, Zhi ZHANG, Tian TANG, Yu-zhen HUANG

Journal Article