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WASE International Conference on Information Engineering, ICIE

作者： Gui-zhen Chen Xiao-chun Zhang En-jie Ding College of Information and Electrical Engineering China University of Mining and Technology Xuzhou Jiangsu China

The present wireless communication system under coal mines is characterized by single pattern, fixed communication frequency, incapability of adaptive to various tunnel environments. To solve the above problems, cognitive radio (CR) is applied to the system. This paper focuses on the application of energy detection algorithms used in the spectrum sensing of various tunnels under mines. The detection probability of Rayleigh channel and Rician channel is analyzed, and the feedback joint detection algorithm based on the tunnel environment is put forward. The simulation shows that the probability of cooperative sensing system obviously rises with the method of self adaptive through feedback information to adjust the node weight.

关键词： Cognitive radio Chromium Wireless sensor networks Fading Feedback Wireless communication Frequency detection algorithms Rayleigh channels Rician channels

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Research and DSP Realization of Digital Watermarking Algorithm Used for Copyright Protection

Research and DSP Realization of Digital Watermarking Algorit...

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International Conference on Intelligent Computation Technology and Automation, ICICTA

作者： Zude Zhou Juanjuan Xing Quan Liu School of Information Engineering Wuhan University of Technology Wuhan Hubei China

With the development of communication technology, digital watermarking is widely used in copyright protection and the algorithms are more and more sophisticated. A new digital watermarking algorithm used for copyright protection is proposed in this paper, and it is realized by DSP. First, the original image is blocked, and the integer lifting wavelet transform is carried out for each blocked image; then the direct sequence spread spectrum is done to the watermark sequence by using the spreading codes which are generated through the chaotic system, and the spread spectrum watermark is embedded in the high-frequency sub-bands; Finally, the watermarked image is obtained through the block inverse wavelet transform. Watermark detection process does not require the original image; it is a blind detection algorithm. The algorithm can resist to random noise, filtering, compression, shearing, sample and other attacks. The DSP realization can better process the watermark embedding and detection, and can meet the requirements of general application. It has the features such as high computing speed, high algorithm efficiency and strong practicality and so on.

关键词： Digital signal processing Watermarking Copyright protection Wavelet transforms Spread spectrum communication Communications technology Chaotic communication detection algorithms Filtering algorithms Resists

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Real-Time Viewer detection Algorithm for Smart EPG in the intelligent DTV

Real-Time Viewer Detection Algorithm for Smart EPG in the in...

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IEEE International Conference on Consumer Electronics (ICCE)

作者： Seung-Kyun Kim Dongni Zhang Dae-Hwan Kim Sang-Hee Park Sung-Jea Ko Department of Electronic Engineering Korea University Seoul South Korea

In order to provide personalized services in an intelligent digital TV (DTV), a fast and robust viewer detection algorithm is essential. However, conventional face detection algorithms are too costly or not robust for consumer use. Thus, in this paper, we propose a novel viewer detection algorithm for real-time viewer identification in the intelligent DTV. In the proposed algorithm, a viewer is detected by using our proposed modified codebook (MCB) method, and then the face region is extracted by using the normalized horizontal and vertical histogram from the detected person. Experimental results show that the proposed algorithm successfully performs at the speed of 20～25fps, which is suitable for real-time applications in the intelligent DTV.

关键词： detection algorithms Digital TV Face detection Robustness Neural networks Histograms HDTV Brightness Senior members Smart cameras

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A GMM Based Automatic Red Eye detection Algorithm

A GMM Based Automatic Red Eye Detection Algorithm

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IEEE International Conference on Consumer Electronics (ICCE)

作者： Mithun Uliyar Krishna, A. G. P. S. S. B. K. Gupta J. P. Pai Aricent India

In digital photography Red eye is caused mainly under low light conditions when a flash is used for capturing the image. Many of the commercial solutions that are available in the market require some user intervention. In this paper we present a method, which detects the presence of red eyes in Images without any user intervention and corrects it. The automatic solution is based on GMM (Gaussian Mixture Model) classifiers for the detection stage. The proposed method corrected about 81% of the red eye artifacts in a test image database of 500 images, resulting in very few wrong corrections. The computational complexity of running this algorithm on a consumer electronics device such as a digital camera or a mobile phone is also very less.

关键词： detection algorithms Skin Face detection Eyes Image databases Digital cameras Image resolution Shape measurement Digital photography Testing

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A SURVEY OF INTERNET WORM detection AND CONTAINMENT

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IEEE COMMUNICATIONS SURVEYS AND TUTORIALS 2008年第1期10卷 20-35页

作者： Li, Pele Salour, Mehdi Su, Xiao San Jose State Univ Dept Comp Engn San Jose CA 95192 USA

Self-duplicating, self-propagating malicious codes known as computer worms spread themselves without any human interaction and launch the most destructive attacks against computer networks. At the same time, being fully automated makes their behavior repetitious and predictable. This article presents a survey and comparison of Internet worm detection and containment schemes. We first identify worm characteristics through their behavior, and then classify worm detection algorithms based on the parameters used in the algorithms. Furthermore, we analyze and compare different detection algorithms with reference to the worm characteristics by identifying the type of worms that can and cannot be detected by these schemes. After detecting the existence of worms, the next step is to contain them. This article explores the current methods used to slow down or stop the spread of worms. The locations to implement detection and containment, as well as the scope of each of these systems/methods, are also explored in depth. Finally, this article points out the remaining challenges of worm detection and future research directions.

关键词： Internet Computer worms Computer networks detection algorithms Storage area networks Algorithm design and analysis Computer security IP networks Intrusion detection

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A Novel Parallel Iterative Cycle QR Decomposition detection Algorithm in VBLAST-OFDM System

A Novel Parallel Iterative Cycle QR Decomposition Detection ...

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IEEE International Symposium on IT in Medicine and Education

作者： Li Yong-jie Fu Hong-liang Henan Univ Technol Coll Informat Sci & Engn Zhengzhou 450001 Peoples R China

ISBN: (纸本)9781424425105

A novel parallel iterative cycle OR decomposition detection algorithm in VBLAST-OFDM system is proposed in this paper. In order to overcome the disadvantage of the poor performance of the first defected layer in IQRD algorithm, the parallel detection is applied to the IQRD algorithm and the performance is improved effectively. Simulation results show that the proposed P-IQRD algorithm is superior to the IQRD algorithm.

关键词： detection algorithms Iterative Parallel Lines Simulation results

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PTBBWD: A fast Process traffic behavior based worm detection algorithm

PTBBWD: A fast Process traffic behavior based worm detection...

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International Seminar on Future Information Technology and Management Engineering

作者： Xiao Fengtao Hu Huaping Liu Bo Chen Xin Natl Univ Def Technol Sch Comp Sci Changsha 410073 Hunan Peoples R China

ISBN: (纸本)9780769534800

An algorithm named PTBBWD is presented to detect worms. It is process traffic behavior based and has considered three important behaviors: total amount of source ports in wormlike traffic, changing frequency of source ports in wormlike process traffic and the wormlike traffic proportion of the total process traffic. Unlike similar work before, PTBBWD checks the frequency and the total amount of source ports only when a process is sending wormlike traffic. Experiments using applications in the wild show that PTBBWD can detect worms quickly and correctly with small false positives.

关键词： traffic behavior Traffic detection algorithms worn screw

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Design and Implementation of Long-Range RFID Reader for Sensor Tag System

Design and Implementation of Long-Range RFID Reader for Sens...

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IEEE International Conference on Consumer Electronics (ICCE)

作者： Dong-Beom Shin Hyung-Chul Park Heyung-Sub Lee Dae-Young Kim

ISO/IEC 24753 defines new modem specifications for long-range RFID communications and application protocol for sensor tag system. According to the ISO/IEC 24753, the frequency offset of the tag is 4%. In this paper, we designed a non-coherent receiver structure to solve the frequency offset problem. A frequency estimation block was designed to mitigate the effects of 4% frequency offset and a start frame delimiter (SFD) detection algorithm was proposed to determine the start position of the payload. We implemented a long-range RFID reader with the proposed methods and evaluated its performance in a wired network. The implemented long-range RFID reader showed more superior performance than the commercial RFID reader.

关键词： Radiofrequency identification Sensor systems ISO standards IEC standards Frequency estimation Modems Protocols Sensor systems and applications Algorithm design and analysis detection algorithms

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Application of undecimated wavelet transform to surface defect detection of hot rolled steel plates

Application of undecimated wavelet transform to surface defe...

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1st International Congress on Image and Signal Processing

作者： Wu Xiu-yong Xu Ke Xu Jin-wu Univ Sci & Technol Beijing Natl Engn Res Ctr Adv Rolling Technol Beijing 100083 Peoples R China

ISBN: (纸本)9780769531199

Characteristics of surface defects of hot rolled steel plates were analyzed, and an algorithm for detection of hot rolled steel plates was developed Based on undecimated wavelet transform and mathematical morphology, the algorithm can solve the problem of false alarms by scales and water marks. Positions of defects were determined by modular maximum of interscale correlation of wavelet coefficient at first, and then the defects were classified with priori knowledge about characteristic of surface defects on hot rolled steel plates. Experimental results shows that the algorithm is not sensitive to disturbance of scales, water marks and uneven illumination, and the recognition rate of defects is zip to 90.23%.

关键词： Wavelet transforms Surface waves Steel Surface morphology Discrete wavelet transforms Signal processing algorithms Wavelet coefficients Lighting Low pass filters detection algorithms

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Wipe Scene-change Detector Based on Visual Rhythm Spectrum

Wipe Scene-change Detector Based on Visual Rhythm Spectrum

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IEEE International Conference on Consumer Electronics (ICCE)

作者： Kwang-deok Seo Seong Jun Park Soon-heung Jung Computer and Telecommunications Engineering Division Yonsei University Gangwon South Korea School of Electrical and Computer Engineering Purdue University IN USA Convergence Media Research Team Electronics and Telecommunications Research Institute Daejeon South Korea

To store and retrieve large-scale video data sets effectively, the process of wipe detection is an essential step. In this paper, we propose a wipe scene-change detection algorithm based on Visual Rhythm Spectrum (VRS). The VRS contains distinctive patterns or visual features for wipe effects. During a wipe, intensity change between incoming and the outgoing shots gives rise to abrupt intensity discontinuities on the VRS. The proposed algorithm is designed to detect such discontinuities.

关键词： Detectors Rhythm Virtual reality detection algorithms Layout Telecommunication computing Sampling methods Change detection algorithms Video sequences USA Councils

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