2008 IEEE 8th International Conference on Computer and Information Technology Workshops最新文献_第10页

An Approach to Support and Partially Automate Requirements Engineering Activities 支持和部分自动化需求工程活动的方法

2008 IEEE 8th International Conference on Computer and Information Technology Workshops Pub Date : 2008-07-08 DOI: 10.1109/CIT.2008.WORKSHOPS.83

S.A. Fahmi, A. Ibrahim, Ho‐Jin Choi

引用次数: 2

A Strategy for Attributes Selection in Cost-Sensitive Decision Trees Induction 成本敏感决策树归纳中属性选择策略

2008 IEEE 8th International Conference on Computer and Information Technology Workshops Pub Date : 2008-07-08 DOI: 10.1109/CIT.2008.WORKSHOPS.51

Shichao Zhang, Li Liu, Xiaofeng Zhu, Chen Zhang

引用次数: 22

Practical Performance Evaluation of Peer-to-Peer Internet Telephony Using SIP 基于SIP的点对点网络电话实际性能评估

2008 IEEE 8th International Conference on Computer and Information Technology Workshops Pub Date : 2008-07-08 DOI: 10.1109/CIT.2008.WORKSHOPS.44

B. Meyer, M. Portmann

{"title":"Practical Performance Evaluation of Peer-to-Peer Internet Telephony Using SIP","authors":"B. Meyer, M. Portmann","doi":"10.1109/CIT.2008.WORKSHOPS.44","DOIUrl":"https://doi.org/10.1109/CIT.2008.WORKSHOPS.44","url":null,"abstract":"Peer-to-peer (P2P) systems have been shown to have excellent scalability and fault tolerance characteristics, mainly due to their distributed nature and the lack of a single point of failure. As a result, P2P technology has been proposed for a wide range of applications. Recently, a number of researchers proposed the use of P2P technology in the context of Voice over IP (VoIP) or Internet Telephony, in particular with the IETF's Session Initiation Protocol (SIP).By replacing the centralised components of the client/server based SIP protocol with a P2P system (P2P-SIP), a higher level of robustness and scalability can be achieved. However, this comes at the cost of a higher latency, which might negatively impact on the Quality of Service (QoS) due to increased delays in call establishment. In this paper, we provide a practical performance evaluation of a P2P-SIP system via extensive measurements on OpenDHT, a large scale, publicly accessible P2P system. The basis of this evaluation is formed by our own implementation of a P2P-SIP system, and standard, SIP-compliant client software. Our results confirm the feasibility of the P2P-SIP approach, since the cost in terms of increased delay in call setup time is quite moderate and well below the recommended value for traditional telephony defined by the Standardisation Sector of the International Telecommunication Union (ITU-T).","PeriodicalId":155998,"journal":{"name":"2008 IEEE 8th International Conference on Computer and Information Technology Workshops","volume":"307 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121745793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 14

Protecting Information Systems from DDoS Attack Using Multicore Methodology 利用多核方法保护信息系统免受DDoS攻击

2008 IEEE 8th International Conference on Computer and Information Technology Workshops Pub Date : 2008-07-08 DOI: 10.1109/CIT.2008.WORKSHOPS.88

Ashley Chonka, Wanlei Zhou, K. Knapp, Y. Xiang

引用次数: 17

Context Reasoning Using Contextual Graph 使用上下文图进行上下文推理

2008 IEEE 8th International Conference on Computer and Information Technology Workshops Pub Date : 2008-07-08 DOI: 10.1109/CIT.2008.WORKSHOPS.96

Tam V. Nguyen, Deokjai Choi

引用次数: 4

Towards Trusted Aspect Composition 迈向可信方面组合

2008 IEEE 8th International Conference on Computer and Information Technology Workshops Pub Date : 2008-07-08 DOI: 10.1109/CIT.2008.WORKSHOPS.39

Chengwan He, Zheng Li, K. He

引用次数: 7

From Good to Bad Ones: Making Spam Detection Easier 从好的到坏的:使垃圾邮件检测更容易

2008 IEEE 8th International Conference on Computer and Information Technology Workshops Pub Date : 2008-07-08 DOI: 10.1109/CIT.2008.WORKSHOPS.49

Li Zhao, Qiancheng Jiang, Yan Zhang

引用次数: 9

Hierarchical Integer Pixel and Adaptive Fractional Pixel Motion Estimation 分层整数像素和自适应分数像素运动估计

2008 IEEE 8th International Conference on Computer and Information Technology Workshops Pub Date : 2008-07-08 DOI: 10.1109/CIT.2008.WORKSHOPS.99

H. Yoon, HyeSuk Kim, Miyoung Kim, Lai Nga, Gueesang Lee

{"title":"Hierarchical Integer Pixel and Adaptive Fractional Pixel Motion Estimation","authors":"H. Yoon, HyeSuk Kim, Miyoung Kim, Lai Nga, Gueesang Lee","doi":"10.1109/CIT.2008.WORKSHOPS.99","DOIUrl":"https://doi.org/10.1109/CIT.2008.WORKSHOPS.99","url":null,"abstract":"Motion estimation (ME) plays an important role in digital video compression, since it can significantly affect the image quality, the encoding speed and the compression ratio. ME is very computationally demanding part of the encoder. To reduce computational complexity and to maintain the good image quality, integer pixel and fractional pixel ME methods are proposed in this paper. For integer pixel ME, a hierarchical search strategy is proposed. This strategy method consists of symmetrical cross search pattern, multi square grid pattern, large and small diamond search patterns. To reduce the computational time and not to fall into the local minimum, these search patterns place search points symmetrically and evenly in the overall search area. After integer pixel ME, the adaptive fractional pixel ME method is performed. This fractional pixel ME method decides the search pattern adaptively according to the block size. Experimental results show that the speedup improvement of the proposed method over unsymmetrical cross multi hexagon grid search (UMHexagonS) and full search (FS) can be about 1.2~ 5.2 times faster. Compared to image quality of FS, the proposed method shows an average PSNR drop of 0.01 dB while showing an average PSNR gain of 0.02 dB in comparison to that of UMHexagonS.","PeriodicalId":155998,"journal":{"name":"2008 IEEE 8th International Conference on Computer and Information Technology Workshops","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126032968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Cover Selection Steganography Method Based on Similarity of Image Blocks 基于图像块相似性的封面选择隐写方法

2008 IEEE 8th International Conference on Computer and Information Technology Workshops Pub Date : 2008-07-08 DOI: 10.1109/CIT.2008.WORKSHOPS.34

H. Sajedi, M. Jamzad

{"title":"Cover Selection Steganography Method Based on Similarity of Image Blocks","authors":"H. Sajedi, M. Jamzad","doi":"10.1109/CIT.2008.WORKSHOPS.34","DOIUrl":"https://doi.org/10.1109/CIT.2008.WORKSHOPS.34","url":null,"abstract":"An advantage of steganography, as opposed to other information hiding techniques, is that the embedder can select a cover image that results in the least detectable stego image. In a previously proposed method, a technique based on block texture similarity was introduced where blocks of cover image were replaced with the similar secret image blocks; then indices of secret image blocks were stored in cover image. In this method, the blocks of secret image are compared with blocks of a set of cover images and the image with most similar blocks to those of the secret image is selected as the best candidate to carry the secret image. Using appropriate features for comparing image blocks, guaranties higher quality of stego images and consequently, allows for higher embedding capacity, less delectability and, enhanced security. Based on this idea, in this paper, an adaptive cover selection steganography method is proposed, that uses statistical features of image blocks and their neighborhood. Using the block neighborhood information, we prevent appearing virtual edges in the sides and corners of the replaced blocks. Our method is examined with feature based and wavelet based steganalysis algorithms. The results prove the effectiveness and benefits of the proposed method.","PeriodicalId":155998,"journal":{"name":"2008 IEEE 8th International Conference on Computer and Information Technology Workshops","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131478046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 46

A Framework for Intelligent Video Surveillance 一种智能视频监控框架

2008 IEEE 8th International Conference on Computer and Information Technology Workshops Pub Date : 2008-07-08 DOI: 10.1109/CIT.2008.WORKSHOPS.112

F. Ekpar

{"title":"A Framework for Intelligent Video Surveillance","authors":"F. Ekpar","doi":"10.1109/CIT.2008.WORKSHOPS.112","DOIUrl":"https://doi.org/10.1109/CIT.2008.WORKSHOPS.112","url":null,"abstract":"This paper presents a framework for intelligent video surveillance. Robust distortion correction and rendering algorithms permit the system to support a wide range of video stream sources, including 360-degree panoramic video systems, and to facilitate the substitution of video stream sources, leading to increased scalability. Adaptive object detection, classification and tracking algorithms are employed in a progressive training configuration that allows the system to learn from previous mistakes and to improve performance with increased use. Multiple video stream sources can be combined with arbitrarily shaped overlay surfaces designed to overlay spatially resolved and localized detected and tracked objects on global / local maps such as Global Positioning System (GPS)-enabled maps of the monitored scene for vastly improved situational awareness. Another unique feature of the system is the incorporation of bi-directional communication between the overlay surfaces and the rest of the system via the control unit that enables the use of the localized objects displayed on the overlay surfaces to control the acquisition of higher resolution video corresponding to the region containing the objects in the monitored scene.","PeriodicalId":155998,"journal":{"name":"2008 IEEE 8th International Conference on Computer and Information Technology Workshops","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132967746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7