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Proceedings of 3rd IEEE International Conference on Image Processing

19-19 Sept. 1996

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  • International Conference on Image Processing

    Publication Year: 1996, Page(s):iii - xxxi
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    Freely Available from IEEE
  • An efficient boundary encoding scheme which is optimal in the rate distortion sense

    Publication Year: 1996, Page(s):77 - 80 vol.1
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    In this paper, we present a fast and optimal method for the lossy encoding of object boundaries which are given as 8-connect chain codes. We approximate the boundary by a polygon and consider the problem of finding the polygon which can be encoded with the smallest number of bits for a given maximum distortion. The presented scheme is an extension of the approaches introduced in [l, 2], in that th... View full abstract»

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  • Local tomography in fan-beam geometry using wavelets

    Publication Year: 1996, Page(s):709 - 712 vol.2
    Cited by:  Papers (5)  |  Patents (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (677 KB)

    An algorithm is developed for wavelet based multiresolution reconstruction of a function directly from its fan beam projections. The algorithm uses the locality of wavelet and scaling functions to reconstruct a local region of interest with reduced exposure. In other words, our algorithm saves the radiation exposure in the cases where only a local region of the cross section of a body is to be rec... View full abstract»

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  • Index of authors

    Publication Year: 1996, Page(s):1047 - 1067
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    Freely Available from IEEE
  • Forward error control for MPEG-2 video transport in a wireless ATM LAN

    Publication Year: 1996, Page(s):833 - 836 vol.2
    Cited by:  Papers (23)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (396 KB)

    The performance of error control based on forward error correction (FEC) for MPEG-2 video transmission in an indoor wireless ATM LAN is studied. A multipath fading model is used to investigate the effect of errors on video transport. Combined source and channel coding techniques that employ single layer and scalable MPEG-2 coding to combat channel errors are compared. Simulation results indicate t... View full abstract»

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  • DVFLEX: a flexible MPEG real time video codec

    Publication Year: 1996, Page(s):829 - 832 vol.2
    Cited by:  Papers (3)  |  Patents (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    The MPEG-2 video coding standard offers great latitude in implementation and covers a wide variety of applications. The DVFLEX video encoder allows one to take advantage of this flexibility by making the whole coding loop including the bitstream generation, software programmable. The DVFLEX architecture is basically an array of linearly-connected processing modules. These modules are based on the ... View full abstract»

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  • VIS-based native video processing on UltraSPARC

    Publication Year: 1996, Page(s):153 - 156 vol.2
    Cited by:  Papers (6)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (404 KB)

    The UltraSPARC CPU powers Sun Microsystems' latest workstations. It is the first major CPU to implement a comprehensive set of instructions aimed at high performance digital image and video processing-the Visual Instruction Set, or VIS. This is equivalent to the integration of a parallel DSP core into the CPU, rather than a coprocessor approach. We describe VIS and its application to the implement... View full abstract»

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  • Direct processing of EZW compressed image data

    Publication Year: 1996, Page(s):545 - 548 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (884 KB)

    A method is presented for the processing of EZW encoded image data. Operations of the type expected to be performed by a graphics server-pixel-wise arithmetic, offset, scaling and convolution-are considered specifically. We implement the algorithms within the framework of the EZW codec-suggesting that the codec may in fact be used as an image co-processor. The algorithms that result offer similar ... View full abstract»

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  • A fast route for application of rate-distortion optimal quantization in an MPEG video encoder

    Publication Year: 1996, Page(s):825 - 828 vol.2
    Cited by:  Papers (1)  |  Patents (59)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (324 KB)

    The freedom which is offered by the adaptable MPEG video encoders is meaningfully exploited by means of a “rate-distortion optimal” framework using a Lagrange formalism, as is well known from the literature. One such feature of interest is “optimal quantization”. We propose some practical short-cut solutions, which reduce the computational complexity typically associated wi... View full abstract»

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  • Design and implementation of the visual programming environment for the distributed image processing

    Publication Year: 1996, Page(s):149 - 152 vol.2
    Cited by:  Papers (3)  |  Patents (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB)

    A visual programming environment is proposed for image processing and computer vision, which is based on a dataflow model. A reusable GUI environment is designed by separating user interface and algorithms. A scheduling algorithm is also developed for the synchronous dataflow diagram. To exploit the parallelism of dataflow diagrams, a remote procedure call (RPC) to each processing node is executed... View full abstract»

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  • Scene change detection algorithm for MPEG video sequence

    Publication Year: 1996, Page(s):821 - 824 vol.2
    Cited by:  Papers (12)  |  Patents (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (444 KB)

    A new scene change detection algorithm is developed for MPEG encoded video sequences. The proposed method is very simple that it only requires the bit-rate information at macroblock level as well as the number of various motion-predicted blocks for detection. Those information can be extracted easily from the encoded bit-stream without decompression. Simulation results on different sequences show ... View full abstract»

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  • Fuzzy-set based feature extraction for objects of various shapes and appearances

    Publication Year: 1996, Page(s):983 - 986 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    A method to extract functional primitives using fuzzy relations so as to effectively describe objects of various shapes and appearances is proposed. Object surfaces in a range image are segmented into visual surface regions. The geometric features between these regions are represented as fuzzy functions, which are used to extract functional primitives. This method can efficiently deal with such an... View full abstract»

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  • Document image decoding in the Berkeley Digital Library

    Publication Year: 1996, Page(s):769 - 772 vol.2
    Cited by:  Papers (1)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (420 KB)

    The UC Berkeley Environmental Digital Library Project is one of six university led projects that were initiated in the fall of 1994 as part of a four year digital library initiative sponsored by the NSF, NASA and ARPA. The Berkeley project is particularly interesting from an image processing perspective because its testbed collection consists almost entirely of scanned materials. As a result, the ... View full abstract»

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  • Real-time embedded image processing applications using the A3 methodology

    Publication Year: 1996, Page(s):145 - 148 vol.2
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (432 KB)

    In order to cope with the needs involved in real-time embedded image processing applications, multicomponent architectures are required. We used the well known edge detection algorithm to demonstrate how the A3 methodology (algorithm architecture adequation), and the CAD software SynDEx which supports it, may improve the implementation of such algorithms on multi-DSP architectures. The ... View full abstract»

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  • Self-calibration of a stereo-camera by pure translational motion

    Publication Year: 1996, Page(s):297 - 300 vol.2
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (516 KB)

    This paper describes a method for calibrating a stereo-camera using its pure translational motion. The left and right cameras translate in several directions simultaneously. For each camera and each translation, an image sequence is obtained, feature points being extracted and tracked. An epipole is estimated for each image sequence and calibration is carried out using the relation between known t... View full abstract»

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  • A content based video traffic model using camera operations

    Publication Year: 1996, Page(s):817 - 820 vol.2
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    We present our work on content based video (CBV) traffic modeling of variable bit rate (VBR) sources. The CBV approach differs from previous works in that it is not based only on matching of various statistics of the original source, but rather on modeling and mapping its visual content into the corresponding bit rate. We show that the CBV model is fully compatible with current and future compress... View full abstract»

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  • Development of a scene recognition system with imprecise descriptions

    Publication Year: 1996, Page(s):979 - 982 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (452 KB)

    This paper presents the development of a scene interpretation system with imprecise descriptions in a 3D robotics context. The problem of “scene recognition” is presented as the matching of images with a priori descriptions given in a high level language. The mission consists in the identification of the position of an object in a scene with a vision system situated at the end of a man... View full abstract»

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  • Browsing large satellite and aerial photographs

    Publication Year: 1996, Page(s):765 - 768 vol.2
    Cited by:  Papers (12)  |  Patents (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (948 KB)

    Image content based retrieval in the Alexandria digital library project has focussed on texture and color features for querying the database. A robust texture feature extraction algorithm and a fast segmentation scheme have been developed. The texture features are computed by filtering the image with a bank of Gabor filters. This is followed by a clustering scheme to create a texture based feature... View full abstract»

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  • Watching behaviour: the role of context and learning

    Publication Year: 1996, Page(s):797 - 800 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (448 KB)

    This paper describes the problems and issues involved in developing artificial visual agents that watch moving objects and their interactions in real world situations. One objective of this work is to form conceptual descriptions that capture the behaviours of objects. To do this we use the dynamic scene context but here we go further and incorporate task context and simple learning of behavioural... View full abstract»

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  • A data parallel implementation of an edge point chaining: towards a new principle of edge linking

    Publication Year: 1996, Page(s):141 - 144 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (348 KB)

    The paper focuses on the problem of the implementation under the data parallel programming model of an edge point chaining algorithm. This implementation is not a straightforward transposition of classical algorithms developed so far; indeed all of those are based upon a video scanning of the image, and are thus sequential by nature. Therefore, a new data parallel algorithm has been designed. The ... View full abstract»

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  • Noise suppression based on the fractal dimension estimates

    Publication Year: 1996, Page(s):193 - 196 vol.2
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (324 KB)

    The paper draws on the problem of noise reduction in binary images. Noise suppression plays very important role in the automated document analysis, since corrupted pictures may drastically reduce efficiency of the recognition process. The fractal based technique is one of the most recent approaches in computer vision. The fractal dimension estimates are incorporated in a highly efficient filtering... View full abstract»

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  • Realization of a digital tomographic imaging system applied to odontology

    Publication Year: 1996, Page(s):697 - 700 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (452 KB)

    We present the realization of a digital X-ray panoramic system. We analyze accurately the principle of the slot rotational tomography installed on the conventional X-ray panoramic system. This is used to reproduce the same phenomena, obtained on the silver film, on a digital sensor. The exposure technique allows one to define a sliced image including the maxilla-facial structures of a patient. On ... View full abstract»

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  • A new rate control scheme using quadratic rate distortion model

    Publication Year: 1996, Page(s):73 - 76 vol.2
    Cited by:  Papers (6)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    A new rate control scheme is used to calculate the target bit rate for each frame based on a quadratic formulation of the rate distortion function. The distortion measure are assumed to be either the average quantization scale of a frame or mean square error. The rate distortion function is modeled as a second order function of the inverse of the distortion measure. We presented a closed form solu... View full abstract»

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  • Tracking fuzzy storm centers in Doppler radar images

    Publication Year: 1996, Page(s):959 - 962 vol.2
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    We describe an automatic storm tracking system to help with the forecasting of severe storms. The concepts fuzzy point, fuzzy vector, fuzzy length of a fuzzy vector, and the fuzzy angle between two non-zero fuzzy vectors are first examined. We use a region splitting algorithm with dynamic thresholding to determine storm masses in Doppler radar intensity images. We represent the center of an hypoth... View full abstract»

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  • Fast wavelet transform for color image compression

    Publication Year: 1996, Page(s):541 - 544 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (576 KB)

    In this paper a generalized algorithm for fast Harr wavelet transform was developed for the compression of monochrome and color images, and was evaluated through three quantitative measures: namely, mean square error, mean absolute error and signal-to-noise ratio. Excellent reconstructed images were obtained with high rates of compression. The computational advantage of this 2D FHWT over the conve... View full abstract»

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