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Proceedings 2001 International Conference on Image Processing (Cat. No.01CH37205)

7-10 Oct. 2001

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  • Proceedings 2001 International Conference On Image Processing [front matter]

    Publication Year: 2001, Page(s):i - lxx
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  • Memory hierarchy exploration for low power architectures in embedded multimedia applications

    Publication Year: 2001, Page(s):326 - 329 vol.3
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (356 KB) | HTML iconHTML

    Multimedia applications are characterized by an increased number of data transfer and storage operations due to real time requirements. Appropriate transformations can be applied at the algorithmic level to improve crucial implementation characteristics. The effect of the data-reuse transformations on power consumption, area and performance of multimedia applications realized on embedded cores is ... View full abstract»

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  • Error-resilient mobile video by edge adapted multiscale transforms

    Publication Year: 2001
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (73 KB) | HTML iconHTML

    Summary form only given, as follows. Mobile video systems face particularly challenging problems due to the hostile nature of the mobile radio channel and the very low bit-rate available. For the fading channel, the Shannon separation principle does not hold, and hence source and channel coding should be considered jointly. This talk reviews some advances in our work on joint optimization of video... View full abstract»

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  • Performance comparison of MPEG-4 scalable and non-scalable video streaming

    Publication Year: 2001
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (31 KB)

    Summary form only given, as follows. We first show that 3G wireless multimedia systems adopting scalable video encoding can achieve higher overall network utilization. Moreover, the problems of both packet loss and player rebuffering can degrade wireless streaming performance if the streaming video is non-scalable due to fading/retransmission and multi-user sharing. We demonstrate that these probl... View full abstract»

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  • Wireless video-do standards matter?

    Publication Year: 2001
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (40 KB)

    Summary form only given, as follows. It is usually assumed that standards are an essential prerequisite for the exchange of various types of data, not least video. For as long as codecs have necessarily been implemented in dedicated hardware this has been true. Now, however, the ground-rules are changing rapidly. General-purpose processors are becoming more powerful but less power hungry. Java is ... View full abstract»

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  • Visualization and navigation in image database applications based on MPEG-7 descriptors

    Publication Year: 2001
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (31 KB)

    Summary form only given, as follows. The MPEG-7 standard is currently being developed to specify standardized interfaces that help users or agents to identify, filter, browse and efficiently retrieve audio-visual material. The purpose of the presentation is to provide an overview of the scope and potential of the MPEG-7 standard, with particular emphasis on no-text descriptors for visual content. ... View full abstract»

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  • Author index

    Publication Year: 2001, Page(s):1111 - 1127
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    Freely Available from IEEE
  • Higher order autocorrelations for pattern classification

    Publication Year: 2001, Page(s):724 - 727 vol.3
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (256 KB) | HTML iconHTML

    The use of higher-order local autocorrelations as features for pattern recognition has been acknowledged for many years, but their applicability was restricted to relatively low orders (2 or 3) and small local neighborhoods, due to combinatorial increase in computational costs. A new method for using these features is presented, which allows the use of autocorrelations of any order and of larger n... View full abstract»

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  • Category-based image retrieval

    Publication Year: 2001, Page(s):596 - 599 vol.3
    Cited by:  Papers (5)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB) | HTML iconHTML

    This work presents a novel approach to content-based image retrieval in categorical multimedia databases. The images are indexed using a combination of text and content descriptors. The categories are viewed as semantic clusters of images and are used to confine the search space. Keywords are used to identify candidate categories. Content-based retrieval is performed in these categories using mult... View full abstract»

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  • Formulae for polytope volume and surface moments

    Publication Year: 2001, Page(s):720 - 723 vol.3
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (256 KB) | HTML iconHTML

    Object moments and moment invariants are widely used in image analysis and recognition. The paper describes an approach and presents explicit formulae for calculation of polyhedron volume and surface moments via coordinates of polyhedron vertices. General formulae for calculation of arbitrary order volume and surface moments for polytopes in Rn are also obtained View full abstract»

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  • Scalable algorithms for media processing

    Publication Year: 2001, Page(s):342 - 345 vol.3
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (256 KB) | HTML iconHTML

    Since programmable platforms have a fixed number of resources, the number of algorithms that can run in parallel is limited. We propose to overcome this by introducing scalable algorithms that are capable of trading resource usage for output quality. We show the feasibility of this approach by means of an implementation example, namely scalable sharpness enhancement for video signals View full abstract»

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  • Integrating color and spatial features for content-based video retrieval

    Publication Year: 2001, Page(s):592 - 595 vol.3
    Cited by:  Papers (5)  |  Patents (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB) | HTML iconHTML

    We present a novel scheme for content-based video retrieval by exploring the spatio-temporal information. A shot with significant content changes can be segmented into several subshots that are of coherent content, and a shot similarity measure for video retrieval can be computed from the similarity between corresponding subshots. To characterize the temporal content variations in one shot, we dev... View full abstract»

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  • Region extraction method based on clustering along an object contour

    Publication Year: 2001, Page(s):86 - 89 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB) | HTML iconHTML

    For accurate region extraction, region-based active contour models (ACM) have been proposed. Compared with ordinary ACM, they require heavier loads of initial settings and further processing time. Considering these problems, for effective and efficient extraction, we propose a new region-based ACM. In the proposed method, first, users draw an initial curve in an object. Along this curve, definite ... View full abstract»

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  • Dynamic Active Search for quick object detection with pan-tilt-zoom camera

    Publication Year: 2001, Page(s):716 - 719 vol.3
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB) | HTML iconHTML

    This paper proposes a search method for detecting known objects quickly in 3D environments with a pan-tilt-zoom camera. In our previous work, we proposed an algorithm named Active Search that greatly reduces the number of calculations required to obtain a match between a reference object and an input image using color histograms. We describe two improvements we have made to Active Search for such ... View full abstract»

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  • Adaptive suppression of RFI and its effect on radio-astronomical image formation

    Publication Year: 2001, Page(s):616 - 619 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB) | HTML iconHTML

    Radio-astronomical observations are increasingly contaminated by interference, and suppression techniques become essential. A powerful candidate for interference mitigation is adaptive spatial filtering. We study the effect of spatial filtering techniques on radio astronomical imaging. Current deconvolution procedures such as CLEAN are shown to be unsuitable for spatially filtered data, and the ne... View full abstract»

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  • Active contours network to straighten distorted text lines

    Publication Year: 2001, Page(s):748 - 751 vol.3
    Cited by:  Papers (11)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB) | HTML iconHTML

    We introduce a new method to straighten text lines. The general approach consists of using an active contour network based on an analytical model. First, we propose a method based on Bezier curves; then we present a model that requires cubic B-splines which leads to more accurate results. Finally, we propose to automate the initialization by using an approach based on a particle system. The propos... View full abstract»

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  • All-integer Hough transform: performance evaluation

    Publication Year: 2001, Page(s):338 - 341 vol.3
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB) | HTML iconHTML

    The Hough transform is a widely used tool for line detection mainly due to its robustness to noise; on the other hand, it is also known to be computationally expensive, thus often preventing real-time operation. In this paper we evaluate the performance of an all-integer version of the Hough transform, implemented without floating point operations. We show that the integer transform is 2 to 3.5 ti... View full abstract»

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  • Fingerprint classification using Kohonen topologic map

    Publication Year: 2001, Page(s):230 - 233 vol.3
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB) | HTML iconHTML

    Self organizing maps are efficient for dimension reduction and data clustering. We propose the use of the Kohonen topologic map for fingerprint pattern classification. The learning process takes into account the large intra-class diversity and the continuum of fingerprint pattern types. After a brief introduction to fingerprint domain-specific knowledge and the expert approach, we present an origi... View full abstract»

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  • VISMap: an interactive image/video retrieval system using visualization and concept maps

    Publication Year: 2001, Page(s):588 - 591 vol.3
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB) | HTML iconHTML

    Images and videos can be indexed by multiple features at different levels, such as color, texture, motion and text annotation. Organizing this information into a system so that users can query effectively is a challenging and important problem. We present VISMap, a visual information seeking system that extends the traditional query paradigms of query-by-example and query-by-sketch and replaces th... View full abstract»

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  • Priority search technique for MPEG-4 motion estimation of arbitrarily shaped video object

    Publication Year: 2001, Page(s):644 - 647 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB) | HTML iconHTML

    One of the main differences between MPEG-4 and previously standardized video coding schemes is the support of arbitrarily shaped video objects, for which most of the existing fast motion estimation algorithms are not suitable. The conventional fast motion estimation algorithm works well for opaque macroblocks, but not in the case of a boundary macroblock which contains a large number of local mini... View full abstract»

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  • Hypermask: talking head projected onto moving surface

    Publication Year: 2001, Page(s):947 - 950 vol.3
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB) | HTML iconHTML

    Hypermask is a system which projects an animated face onto a physical mask, worn by an actor. As the mask moves within a prescribed area, its position and orientation are detected by a camera, and the projected image changes with respect to the viewpoint of the audience. The lips of the projected face are automatically synthesized in real time with the voice of the actor, who also controls the fac... View full abstract»

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  • Optimization of the joint coding/decoding structure

    Publication Year: 2001, Page(s):470 - 473 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB) | HTML iconHTML

    This paper considers the estimation scenario where an original image has undergone blurring, noise corruption and compression. The authors consider these unwanted effects jointly in the estimation formalism they propose. The contribution of the paper aims to address the joint coding/decoding formulation, involving a priori assumptions on the solution and knowledge of the imaging systems to account... View full abstract»

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  • A deformable model for image segmentation in noisy medical images

    Publication Year: 2001, Page(s):82 - 85 vol.3
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB) | HTML iconHTML

    Deformable-model-based segmentation techniques can overcome some limitations of the traditional image processing techniques. Currently developed deformable models can cope with gaps and another irregularities in object boundaries. However, they present problems in noisy images. Our approach is able to segment objects in noisy images by defining a new energy function associated with image noise and... View full abstract»

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  • The orientation matching approach to circular object detection

    Publication Year: 2001, Page(s):712 - 715 vol.3
    Cited by:  Papers (7)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB) | HTML iconHTML

    The paper reports a correlation-based method for the detection of circular objects which is capable of overcoming well-known problems arising from the use of gradient-based voting schemes. Specifically, the method is: (a) capable of detecting circular objects on the basis of both magnitude and direction of the image gradient; and (b) dealing with three-dimensional spherical objects by considering ... View full abstract»

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  • Radio astronomy image enhancement in the presence of phase errors using genetic algorithms

    Publication Year: 2001, Page(s):612 - 615 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB) | HTML iconHTML

    Modern radio astronomy interferometric telescopes use Earth rotation aperture synthesis imaging techniques. New projects for radio telescopes include hundreds and thousands of elements and presume multibeam and snapshot imaging. Each element, or base station, in its turn is a phase-array antenna. Phase instabilities due to instrumentation and atmospheric phase variations can ruin the synthesized i... View full abstract»

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