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Information Technology: Coding and Computing [Computers and Communications], 2003. Proceedings. ITCC 2003. International Conference on

Date 28-30 April 2003

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Displaying Results 1 - 25 of 133
  • Estimation of motion from a sequence of images using spherical projective geometry

    Publication Year: 2003, Page(s):541 - 545
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (374 KB) | HTML iconHTML

    Motion is an important cue for many applications. Here we propose a solution for estimating motion from a sequence of images using three algorithms, namely, batch, recursive and bootstrap methods. The motion derived using spherical projection relates the image motion to the object motion. This equation is reformulated into a dynamical space state model, for which a Kalman filter can be easily appl... View full abstract»

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  • A distributed memory architecture for morphological image processing

    Publication Year: 2003, Page(s):536 - 540
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2135 KB) | HTML iconHTML

    With the popularity of object based coding methods, mathematical morphology has become a popular technique for image segmentation. Morphological filters are used in a pre-processing step to improve the chances of obtaining meaningful segmentation results. However, the computational cost of these filters limits their practical use. With the increasing demand for real time implementation, there is n... View full abstract»

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  • Simplified Authoring for Instructors using Distance Education (SAIDE)

    Publication Year: 2003, Page(s):43 - 47
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (230 KB) | HTML iconHTML

    This paper presents an alternative to current authoring methods for use in distance education. Several commercially available distance-education authoring tools are briefly discussed and an alternative, SAIDE (Simplified Authoring for Instructors using Distance Education), is presented. The discussion focuses on how SAIDE's easy-to-use feature set is useful to authors/trainers in a non-traditional... View full abstract»

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  • A Web Services-based system for ad-hoc mobile application integration

    Publication Year: 2003, Page(s):248 - 252
    Cited by:  Papers (11)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (708 KB) | HTML iconHTML

    As mobile devices become more powerful and common there will a greater capacity and need for more complex interactions between mobile device-resident software and other server-based software. This can be termed mobile application integration. Mobile computing introduces new opportunities and challenges for application integration. Some of the challenges include small device size, limited bandwidth... View full abstract»

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  • Fast color image processing using quantized color instruction set

    Publication Year: 2003, Page(s):529 - 535
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3892 KB) | HTML iconHTML

    The paper describes the Quantized Color Pack eXtension (QCPX) instruction set that can accelerate color-image processing applications. QCPX employs heterogeneous-subword-parallel instructions, which utilize the microprocessor's 16-bit wide datapaths to process a packed, quantized 16-bit color data type in YCbCr (Y: luminance, Cr and Cb: chrominance) format in parallel. Unlike typical multimedia in... View full abstract»

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  • EDUCOSM - personalized writable Web for learning communities

    Publication Year: 2003, Page(s):37 - 42
    Cited by:  Papers (7)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (350 KB) | HTML iconHTML

    Many of the possibilities of Web-based education are still unexplored. It seems that novel ways of thinking about both learning and technology are needed to get beyond the limitations of the traditional classroom setting. In this paper we introduce EDUCOSM, which focusses on the possibilities of collaboration and the open-ended nature of the Web. Its main features include sharing and annotation of... View full abstract»

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  • Direct Huffman coding and decoding using the table of code-lengths

    Publication Year: 2003, Page(s):237 - 241
    Cited by:  Papers (4)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (268 KB) | HTML iconHTML

    A new Huffman coding and decoding technique is presented. There is no need to construct a full size Huffman table in this technique; instead, the symbols are encoded directly from the table of code-lengths. For decoding purposes a new Condensed Huffman Table (CHT) is also introduced. It is shown that by employing this technique both encoding and decoding operations become significantly faster, and... View full abstract»

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  • Linear time algorithms for finding maximal forward references

    Publication Year: 2003, Page(s):160 - 164
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (292 KB) | HTML iconHTML

    In this paper, two algorithms are designed for finding maximal forward references from very large Web logs, longest sequences of Web pages visited by a user without revisiting some previously visited page in the sequence, and their performance is comparatively analyzed. It is shown that the two algorithms have linear (hence optimal) time complexity. View full abstract»

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  • Concurrent edge detection with Spiral Architecture on Linux

    Publication Year: 2003, Page(s):524 - 528
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (281 KB) | HTML iconHTML

    Edge detection is an essential tool in image analysis. It is a process of identifying significant discontinuities in light intensities in order to form an outline of the object of interest. Spiral Architecture provides powerful computational power as a method of image data representation. Gaussian multi-scale theory was employed as the mathematical model for edge detection. The parallel processing... View full abstract»

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  • Innovative Web-lecturing technology: towards open learning environments

    Publication Year: 2003, Page(s):32 - 36
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (307 KB) | HTML iconHTML

    The InterLabs state-of-the-art Web-lecturing tool for online education has been designed, developed, and tested at the InterLabs Research Institute at Bradley University, Peoria, IL, as a part of the National Science Foundation's CCLI-EMD grant # 0196015. It is based on active utilization of innovative software engineering, streaming multimedia, communication, teaching, and learning and informatio... View full abstract»

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  • The GENIUS Web portal: Grid computing made easy

    Publication Year: 2003, Page(s):425 - 431
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1175 KB) | HTML iconHTML

    The architecture and the current implementation of the Grid portal GENIUS (Grid Enabled Web Environment for Site Independent User Job Submission), jointly developed by INFN and NICE within the context of the INFN Grid and DataGrid projects, is presented and discussed. Particular care is devoted to the description of job submission and monitoring and to transparent access to user's data and applica... View full abstract»

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  • An efficient multiple-errors and multiple-erasures decoding algorithm for multitrack magnetic recording channels

    Publication Year: 2003, Page(s):232 - 236
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (289 KB) | HTML iconHTML

    The paper presents a simple and practical error control mechanism that allows multiple-errors and multiple-erasures correction for multitrack magnetic recording systems. The proposed mechanism is based on using a simple and fast hash function to locate erroneous tracks in magnetic tape and exploit the MDS property of array codes to correct these tracks as erasures. The mechanism enables MDS array ... View full abstract»

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  • Spatial statistics for content based image retrieval

    Publication Year: 2003, Page(s):155 - 159
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (792 KB) | HTML iconHTML

    A content based image retrieval (CBIR) system retrieves relevant images from an image database. Over the years, several methods have been proposed to extract these features. Previous researches show that the effectiveness of a CBIR system increases when spatial relationship of colours is considered. In this paper we propose using the Looseness parameter from geostat, a branch of statistics which d... View full abstract»

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  • Design and implementation of distance learning system based on .NET component technology

    Publication Year: 2003, Page(s):608 - 611
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (271 KB) | HTML iconHTML

    This paper discusses the system structure, data organization and Web application development methodology used in the Chinese language distance learning system. An XML based random test generation algorithm is described in this paper. Some proposed future improvements to the system are also presented at the end of this paper. View full abstract»

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  • Experiments on local positioning with Bluetooth

    Publication Year: 2003, Page(s):297 - 303
    Cited by:  Papers (35)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (319 KB) | HTML iconHTML

    This paper presents the design and implementation of the Bluetooth local positioning application. Positioning is based on received power levels, which are converted to distance estimates according to a simple propagation model. The extended Kalman filter computes a 3D position estimate on the basis of distance estimates. With the used Bluetooth hardware, the mean absolute error of positioning was ... View full abstract»

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  • Feature-bit-plane motion estimation using enhanced motion vector

    Publication Year: 2003, Page(s):519 - 523
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (311 KB) | HTML iconHTML

    This paper presents a fast block-based motion estimation algorithm based on a bit plane technique. This algorithm can produce the eligible candidates for finding the enhanced motion vectors. The proposed method translates the expensive 2D block-matching problem to a simpler 1D matching by choosing some blocks as eligible candidates and eliminating the others. The bit-plane idea combined with the e... View full abstract»

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  • Fast and efficient block motion estimation in the wavelet space

    Publication Year: 2003, Page(s):488 - 494
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3413 KB) | HTML iconHTML

    Block matching algorithms (BMA) have been widely used as standard motion estimation (ME) techniques in video coding practice. In this paper, we present an iterative but analytical motion estimation algorithm with attractive computational efficiency. Our work can be viewed as generalization of the celebrated work of Lucas and Kanade (1981) on iterative image registration into the wavelet space. We ... View full abstract»

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  • A comparative study on the impact of change on IT professionals in Australia and Singapore

    Publication Year: 2003, Page(s):25 - 30
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (286 KB) | HTML iconHTML

    This paper presents a comparative study of two countries based on an online survey to establish the impact of change on information technology (IT) professionals. The online questionnaire survey covered two major issues - the extent of the impact of change and management response. It found that most of the organizations were in the more advanced stage of IT maturity, with a large majority implemen... View full abstract»

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  • Approaches to implementing and teaching human computer interaction

    Publication Year: 2003, Page(s):81 - 84
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (237 KB) | HTML iconHTML

    Computer science education is built upon the fundamentals of problem solving. Our students are capable of solving problems and expressing their solutions in a concrete manner using a programming language. These skills are undoubtedly powerful. However, as the expansion of computer science-related contributions to the world continues, we need to incorporate HCI into our curriculum so that students ... View full abstract»

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  • Methodologies for Web information system design

    Publication Year: 2003, Page(s):420 - 424
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (277 KB) | HTML iconHTML

    The Web information space is rapidly growing in the size and the diversity of both its data and its audience. A consequence is that Web information systems (WIS) in many applications replace existing traditional (not Web based) information systems. Since the nature of WIS differs from the nature of traditional information systems there is a strong demand for design methodologies specifically orien... View full abstract»

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  • On the effects of content compression on Web cache performance

    Publication Year: 2003, Page(s):461 - 466
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (481 KB) | HTML iconHTML

    Compression is widely used to reduce data transmission costs, but its impact on the performance of network entities such as Web caches has not yet been studied. We evaluate the impact of compression on cache performance when the cache compresses content and the client decompresses it. We further determine the performance bounds by benchmarking the best-case (server compression-client decompression... View full abstract»

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  • On quaternary MacDonald codes

    Publication Year: 2003, Page(s):212 - 215
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (325 KB) | HTML iconHTML

    This paper studies two families of codes over Z4, MacDonald codes of type α and type β. The torsion code, weight distribution, and Gray image properties are studied. Some interesting optimal binary codes are also obtained. Two nonlinear families of binary codes are obtained via the Gray map. View full abstract»

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  • The mechanism of ASN.1 encoding and decoding implementation in network protocols

    Publication Year: 2003, Page(s):622 - 626
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (274 KB) | HTML iconHTML

    Abstract Syntax Notation One (ASN.1) plays an important role in many network protocol stacks. Some institutes use compiler-based approach to develop their ASN.1 module. However, this approach has some disadvantages, such as low efficiency, redundant codes, etc, and the module may become one of the performance bottlenecks in high-speed network communication. This paper discusses the requirements of... View full abstract»

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  • Shortest synchronizing codewords of a binary Huffman equivalent code

    Publication Year: 2003, Page(s):226 - 231
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (546 KB) | HTML iconHTML

    The inherent problem of a variable-length code is that even a single bit error can cause loss of synchronization and may lead to error propagation. Synchronizing codewords have been extensively studies as a mean to overcome the drawback and efficiently stop error propagation. First we prove the restatement of a result originally given by B. Ruder (1971) in a more straightforward way. Next, we pres... View full abstract»

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  • Mining for profitable customers

    Publication Year: 2003, Page(s):640 - 644
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (483 KB) | HTML iconHTML

    Customers are not created equal. However, segmenting customers in terms of their profitability is still an underutilized approach in marketing nowadays. Many E-commerce sites still apply the same customer care to all customers without calculating whether the expected profit from a customer is greater than the marketing cost to her or not. In this paper, a decision theoretic approach to segmenting ... View full abstract»

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