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CLOUD image DETECTION BASED ON MARKOV RANDOM FIELD

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Journal of Electronics(china) 2012年第Z2期 262-270页

作者： Xu Xuemei Guo Yuanwei Wang Zhenfei* (School of Physics and Electronics, Central South university, Changsha 410083, china) *(institute for Pattern recognition and artificial intelligence, huazhong university of science and technology, wuhan 410074, china)

In order to overcome the disadvantages of low accuracy rate, high complexity and poor robustness to image noise in many traditional algorithms of cloud image detection, this paper proposed a novel algorithm on the basis of Markov Random Field (MRF) modeling. This paper first defined algorithm model and derived the core factors affecting the performance of the algorithm, and then, the solving of this algorithm was obtained by the use of Belief Propagation (BP) algorithm and Iterated Conditional Modes (ICM) algorithm. Finally, experiments indicate that this algorithm for the cloud image detection has higher average accuracy rate which is about 98.76% and the average result can also reach 96.92% for different type of image noise.

关键词： Cloud image detection Markov Random Field (MRF) Belief Propagation (BP) Iterated Conditional Modes (ICM)

Generic Object recognition with Biologically-Inspired Features

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Generic Object Recognition with Biologically-Inspired Featur...

基于ARM核的嵌入式CPU内AHB接口的实现

2009 Fourth International Conference on Bio-Inspired Computing:Theories and Applications(BIC-TA2009)

作者： Changxin Gao 1 Nong Sang 2 Jun Gao 3 Lamei Zou 4 and Qiling Tang 5 institute for Pattern recognition and artificial intelligence huazhong university of science and technology wuhan 430074 china

In this paper,a set of biologically-inspired features are presented for robust object *** proposed pyramidal feature set is obtained by extracting the geometric relationship of keypoints using a set of biologically inspired templates in different *** is proposed to describe the *** paper brings together new algorithms,representations,and insights which are quite generic and may well have broader applications in computer *** proposed approach has following ***,lifetime is applied to describe the stability of the ***,the templates,which are used to extract the geometric relationships between the keypoints,are biologically inspired structure information extractors or texture information ***,the proposed approach successfully achieves an effective trade-off between generalization ability and discrimination ability for object recognition *** experimental results on object recognition demonstrate the effectiveness of the proposed method.

关键词： geometric relationship keypoints visual cortex generalization ability discrimination ability

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通信学报 2002年第7期23卷 83-90页

作者：江先阳沈绪榜张天序华中科技大学图像识别与人工智能研究所图像信息处理与智能控制教育部重点实验室湖北武汉430074

本文分析了基于芯核的嵌入式CPU设计的特点,提出了设计基于ARM核的嵌入式CPU内AHB接口存在的空洞问题。结合体系的设计,给出了通过改进AHB总线解决这些空洞的方法。最后讨论了嵌入式CPU在硬件上对AHB接口的实现。

关键词： ARM核嵌入式CPU IC设计芯核 AHB总线

A Robust Approach to Authentication of Binary image for Multimedia Communication

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A Robust Approach to Authentication of Binary Image for Mult...

Skew Detection for Binary Document images Using Mathematical Morphyology

2004 International Symposium on Distributed Computing and Applications to Business, Engineering and science

作者： Jin WU~(1 2) Bei-bei XIA~1 Jian LIU~2 Jin-wen TIAN~2 1 College of Information science and Engineering wuhan university of science and technology wuhan Hubei 430081 china 2 institute for Pattern recognition and artificial intelligence huazhong university of science and technology wuhan Hubei 430074 china

＜正＞In recent years,digital watermarking techniques have been proposed to protect the copyright of multimedia data. Different watermarking schemes have been suggested for images,while there is little discussion about binary image. Basing on the analysis of the principle of digital watermarking and a spatial domain algorithm,we propose a watermarking algorithm--the discrete cosine transforms （DCT） to realize the authentication of binary *** experiment results show that the DCT algorithm is feasible to binary *** with the spatial domain algorithm,the watermarked image by the DCT almost has no distortions and is robust to common signal distortions, including geometric manipulations.

关键词： Digital watermarking Binary image DCT Authentication Robust Multimedia Communication

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wuhan university Journal of Natural sciences 2002年第3期7卷 338-340页

作者： Xu Hong bo 1, Tian Yan 2 1. Department of Physics, Central china Normal university, wuhan 430079, Hubei, china 2. institute of Pattern recognition and Artifical intelligence, huazhong university of science and technology, wuhan 430074,Hubei, china Central china Normal university Department of Physics Wuhan Hubei China (GRID:grid.411407.7) (ISNI:***) huazhong university of science and technology Institute of Pattern Recognition and Artifical Intelligence Wuhan Hubei China (GRID:grid.33199.31) (ISNI:***)

The input document images with skew can be a serious problem in the optical character recognition system. A method is proposed for skew detection in binary document images using mathematic morphology. The basic process of our approach consists of three steps: Firstly, a dilation operation is applied to the binary image; Secondly, the dilated image is thinned; Finally, the skew angle is detected using the Hough transform. The proposed approach with high precision can detect skew with large angle (?90δ-90Δ). The experimental result shows this method is applicable and efficient.

关键词： Key words skew detection dilation thinning Hough transform

A Network-Based VPN Architecture Using Virtual Routing

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A Network-Based VPN Architecture Using Virtual Routing

The 1st Chinese Conference on Trusted Computing and Information Security

作者： ZHANG Baoliang. HU Han-ping. WU Xiaogang, KONG Tao State Education Ministry Key Laboratory of image Information and Intelligent Control, wuhan 430074, Hubei, china institute of Pattem recognition and artificial Intelligonce, huazhong university of science and technology, wuhan 430074, Hubei, china 709th Research institute of china Shipbuilding Engineering Society, wuhan 430074, Hubei, china

＜正＞ A network-based Virtual Private Network （VPN） architecture by using fundamental routing mechanism is proposed. This network is a virtual overlay network based on the relay of IP-in-IP tunneling of virtual routing modules. The packet format employs the encapsulation of IPSec ESP （Encapsulating Security Payload）, an impact path code and an extended DS （ Differentiated Services） code to support multi-path routing and QoS. Comparing with other models of VPN, this network system can be deployed in the current network with little investment, and it is easy to implement. The simulation result shows its performance is better than the traditional VPN system of black box mode.

关键词： virtual routing network-based VPN proactivedefense

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基于FPGA的激光条纹中心实时检测

计算机工程与应用 2004年第27期40卷 49-52页

作者：钱铮铁李德华华中科技大学人工智能研究所图像信息处理与智能控制教育部重点试验室武汉430074

为实现结构光激光线条纹中心的实时提取,将方向模板算法进行了适应硬件的改进,且提出并实现了一种专用硬件结构。基于流水线技术和并行技术的硬件设计保证了该算法的实时实现。利用现场可编程门阵列器件FPGA实现了结构光激光线图像条纹... 详细信息

为实现结构光激光线条纹中心的实时提取,将方向模板算法进行了适应硬件的改进,且提出并实现了一种专用硬件结构。基于流水线技术和并行技术的硬件设计保证了该算法的实时实现。利用现场可编程门阵列器件FPGA实现了结构光激光线图像条纹中心线的实时提取。试验表明采用FPGA实现视频处理的专用算法具有成本低、实时性好、研发周期短的优点。

关键词：结构光方向模板 FPGA

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基于角距分布的星表快速查找算法

计算机工程与应用 2004年第9期40卷 16-17,54页

作者：张晨陈朝阳沈绪榜华中科技大学图像识别与人工智能研究所国家教育部重点实验室武汉430074

查找导航星表是星模式识别的重要组成部分,当导航星表数据量大时,导航星表的查找速度直接影响星图识别的速度。因此,设计快速的星表查找算法是非常必要的。通过对导航星角距分布的研究,提出了一种分块子星表查找算法。该方法减小了查找... 详细信息

查找导航星表是星模式识别的重要组成部分,当导航星表数据量大时,导航星表的查找速度直接影响星图识别的速度。因此,设计快速的星表查找算法是非常必要的。通过对导航星角距分布的研究,提出了一种分块子星表查找算法。该方法减小了查找算法的平均查找长度。以6星等导航星库为例,给出了分块子星表的具体建立方法。实验验证了该方法提高了查找速度。

关键词：星对角距折半查找概率分布

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垂直建筑物红外图象的灰度值预测

计算机工程与应用 2004年第28期40卷 27-29页

作者：曹华梁丁明跃华中科技大学图象识别与人工智能研究所教育部信息处理与智能控制重点实验室武汉430074

文章提出了一种通过处理不同时间和天气情况下拍摄到的室外垂直墙面的长波红外图象来预测其灰度值的方法。讨论了长波红外(8～12μm)成象系统中图象灰度值与目标温度关系;研究了室外墙面与其背景间的能量交换,建立了墙面红外图象灰度值... 详细信息

文章提出了一种通过处理不同时间和天气情况下拍摄到的室外垂直墙面的长波红外图象来预测其灰度值的方法。讨论了长波红外(8～12μm)成象系统中图象灰度值与目标温度关系;研究了室外墙面与其背景间的能量交换,建立了墙面红外图象灰度值与时间、天气参数和地理信息之间的方程;通过已知拍摄条件的建筑物的长波红外图象数据拟合方程中的常量,文章最后给出了实验结果。

关键词：长波红外红外图象灰度值建筑物