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ISPA 2001. Proceedings of the 2nd International Symposium on Image and Signal Processing and Analysis. In conjunction with 23rd International Conference on Information Technology Interfaces (IEEE Cat.

19-21 June 2001

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  • ISPA 2001. Proceedings of the 2nd International Symposium on Image and Signal Processing and Analysis. In conjunction with 23rd International Conference on Information Technology Interfaces (IEEE Cat. No.01EX480)

    Publication Year: 2001
    Request permission for commercial reuse | PDF file iconPDF (546 KB)
    Freely Available from IEEE
  • Structural subband decomposition: a new concept in digital signal processing

    Publication Year: 2001
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (33 KB)

    Summary form only given, as follows. Polyphase decomposition of a sequence was advanced to develop computationally efficient interpolators and decimators, and has also been used to design computationally efficient quadrature-mirror filter banks. The polyphase decomposition represents a sequence into a set of sub-sequences, called polyphase components. However, the polyphase components do not exhib... View full abstract»

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  • Speech production-physics, models and prospective applications

    Publication Year: 2001
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (45 KB)

    Summary form only given, as follows. Speech production is a complex feedback process in which hearing, perception and information processing in the nervous system and the brain are also involved. In this contribution, only the forward path of the feedback system is considered, including sound excitation, acoustic wave propagation within the speech production system and radiation from mouth and/or ... View full abstract»

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  • Detecting people in videos for their immersion in a virtual space

    Publication Year: 2001, Page(s):313 - 318
    Cited by:  Patents (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (685 KB) | HTML iconHTML

    This paper presents an application developed to extract people in indoor or outdoor environments using a fixed camera. People are then inserted, in real time, into a dynamic comics environment in which they interact as actors or/and witnesses. The originality of our method relies on two main points. First, the change detection method combines two kinds of masks: region and contour masks. Then, in ... View full abstract»

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  • Author index

    Publication Year: 2001, Page(s):666 - 668
    IEEE is not the copyright holder of this material | PDF file iconPDF (156 KB)
    Freely Available from IEEE
  • Self-matching of stereoscopic images without camera calibration

    Publication Year: 2001, Page(s):176 - 181
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (488 KB) | HTML iconHTML

    To use an uncalibrated stereoscopic head in computer vision applications where the calibration object is not available and the taken images are noisy, we propose an algorithm for the self-matching of stereoscopic images of indoor scenes. We present also a theoretical adaptation to noisy data of the mathematical approach. The stereo matching algorithm has been tested on both synthetic and real imag... View full abstract»

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  • On the design of near-perfect-reconstruction IIR QMF banks using FIR phase-compensation filters

    Publication Year: 2001, Page(s):530 - 534
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (308 KB) | HTML iconHTML

    We describe a novel approach for the design of near-perfect-reconstruction mixed FIR-/allpass-based quadrature mirror filter banks. The design is carried out in the polyphase domain, where FIR filters, obtained via simple closed-form expressions, are employed for compensating the nonlinear phase introduced by the allpass filters. Starting from a generalized two-band structure, we introduce three d... View full abstract»

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  • Panoramic depth imaging with a single standard camera

    Publication Year: 2001, Page(s):170 - 175
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (584 KB) | HTML iconHTML

    In this article, we present a panoramic depth imaging system. The system is mosaic-based which means that we use a single rotating camera and assemble the captured images in a mosaic. Due to an offset of the camera's optical center from the rotational center of the system, we are able to capture the motion parallax effect which enables stereo reconstruction. The camera rotates on a circular path w... View full abstract»

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  • 3D cardiac motion estimation by point-constrained optical flow algorithm

    Publication Year: 2001, Page(s):255 - 259
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (456 KB) | HTML iconHTML

    In this paper, we propose a technique for 3D motion estimation of the left ventricle from an image sequence of a beating human heart. Accurate motion estimation of the cardiac wall has been shown to be very important in studying coronary diseases. The proposed technique requires initial 3D segmentation of the left ventricle area obtained for each time frame during the cardiac cycle. Characteristic... View full abstract»

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  • Optimization of IIR compaction filters with fixed angles poles

    Publication Year: 2001, Page(s):524 - 529
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (376 KB) | HTML iconHTML

    We present a new design method for IIR compaction filters, where the numerator and denominator may have different degrees. The method sets the poles at fixed angles given by the ideal brickwall filter and optimizes the numerator. The method relies on semidefinite programming optimization, using an appropriate parameterization of positive real polynomials. Experimental results show compaction gains... View full abstract»

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  • Defects removing in old movies

    Publication Year: 2001, Page(s):38 - 42
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (564 KB) | HTML iconHTML

    In this paper, a short overview of chosen defects often encountered in old motion pictures is presented. Also, the methodology of treating such sequences is proposed. Local defects such as white or black blotches or scratches are considered. In addition, an algorithm for removing a global type of damage-namely an irritating flicker phenomenon-is elaborated View full abstract»

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  • Search space reduction in the edge based stereo matching by context of disparity gradient limit

    Publication Year: 2001, Page(s):164 - 169
    Cited by:  Papers (3)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (508 KB) | HTML iconHTML

    Traditionally, finding the corresponding points has considered to be the most difficult part of stereo matching algorithms. Usually, the correspondence for a feature point in the first image is obtained by searching in a predefined region of the second image, based on the epipolar line and the maximum disparity. Reduction of the search region can increase the performance of the matching process, i... View full abstract»

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  • Spline-based resampling of noisy images

    Publication Year: 2001, Page(s):580 - 585
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (628 KB) | HTML iconHTML

    We consider the problem of image resampling in the presence of noise in terms of a regularized solution for spline-like model coefficients. The properties of the generalized cross-validation (GCV) and the Akaike information criterion (AIC) for determination of the time number of the model coefficients and the value of the regularization parameter have been examined. A two-parameter optimization pr... View full abstract»

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  • A FEM-based deformable model for the 3D segmentation and tracking of the heart in cardiac MRI

    Publication Year: 2001, Page(s):250 - 254
    Cited by:  Papers (12)  |  Patents (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (488 KB) | HTML iconHTML

    We present a new approach for the segmentation and tracking of the heart from cardiac MR multi-slice and multi-phase image sequences. An a priori model of the object to be segmented is defined. It is composed of a topology and a geometry of the object, and associated elastic material properties. The a priori model is immersed into the image data and submitted to a force field which pulls the model... View full abstract»

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  • Image processing with rational operators: noise smoothing and anisotropic diffusion

    Publication Year: 2001, Page(s):96 - 101
    Cited by:  Papers (8)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (712 KB) | HTML iconHTML

    A brief overview is given in this paper of the possible applications of rational operators in the image processing area. In this family of operators, each output sample can be calculated as a nonlinear function of the input variables, which is expressed as the ratio of two polynomials. This approach is able to yield good results at limited computational costs in the fields of contrast enhancement,... View full abstract»

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  • Fast SDP design of FIR compaction filters with combined constraints

    Publication Year: 2001, Page(s):518 - 523
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (400 KB) | HTML iconHTML

    We propose efficient semidefinite programming methods for designing signal-adapted compaction filters with: (i) spectral mask, and (ii) regularity constraints. In both cases, the initial problem, formulated with the Kalman-Yakubovich-Popov lemma, is transformed by simplifying its dual and the result is an SDP problem with Toeplitz matrices and small number of variables. All resulting methods, whic... View full abstract»

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  • Wavelet image and video coding on parallel architectures

    Publication Year: 2001, Page(s):24 - 35
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (984 KB) | HTML iconHTML

    We discuss parallel algorithms for wavelet-based image and video coding. After reviewing fundamentals of the parallel discrete wavelet transform, we cover the parallelization of two state-of-the-art compression schemes: a C++ 3D SPIHT video codec and a Java JPEG-2000 implementation View full abstract»

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  • On the new filtering technique of noise attenuation in color images

    Publication Year: 2001, Page(s):61 - 66
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1032 KB) | HTML iconHTML

    A new filter class for multichannel image processing is introduced and analyzed. The new technique of image enhancement is capable of reducing impulsive and Gaussian noise and it significantly outperforms the standard methods of noise reduction. In the paper, a smoothing operator, based on a random walk model and on a fuzzy similarity measure between pixels connected by a digital geodesic path, is... View full abstract»

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  • A low resolution content based watermarking of images in wavelet domain

    Publication Year: 2001, Page(s):604 - 608
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (628 KB) | HTML iconHTML

    We present a low-resolution content-based image-watermarking scheme. The watermark is embedded in the lowest resolution representation of the original image obtained after applying three-level wavelet decomposition. In order to increase the invisibility of the watermarking algorithm, a visual model based on local image characteristics, such as textures and edges is incorporated in the watermarking... View full abstract»

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  • Nonlinear image operators, higher-order statistics, and the AND-like combinations of frequency components

    Publication Year: 2001, Page(s):119 - 124
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (676 KB)

    The frequency domain plays a key role in the description of signals and systems. In the classical approaches, the individual frequency components are treated as independent. In linear systems, the superposition principle restricts the filtering to an OR-like processing of independent complex exponentials. Likewise, the classical second-order statistic (the power spectrum) measures only the occurre... View full abstract»

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  • Inter-extrema profile analysis for a texture coarseness estimate in automatic metaphase finding

    Publication Year: 2001, Page(s):159 - 162
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (332 KB) | HTML iconHTML

    As part of a larger effort for automated metaphase finding in cell proliferation studies, we report our experiences with a texture coarseness measure of intensity profile samples. This measure is highly specific to gray-level inter-extrema roughness features in microscopic images of metaphase spreads. Chromosome fragments produce patterns of pixels at low-resolution, and the local neighborhood of ... View full abstract»

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  • Mathematics foundations for signal processing system synthesis through generalized Fibonacci interconnection topologies

    Publication Year: 2001, Page(s):574 - 579
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (440 KB) | HTML iconHTML

    We extend various bit-level and word-level expressions for representation of switching functions, such as SOP, Reed-Muller expressions, arithmetic, and Walsh expressions, to functions used in Fibonacci interconnection topologies. The corresponding Fibonacci decision diagrams (FibDD) are used as graphic representations of these expressions. At the same time, FibDD are used as a data structure to ef... View full abstract»

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  • Left ventricular segmentation in MRI images

    Publication Year: 2001, Page(s):244 - 249
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (588 KB) | HTML iconHTML

    We present an original method for segmentation of the left ventricle from time varying cross-sectional slices. This segmentation method is based on a split and merge algorithm. The endocardial and the epicardial contours in the first image of the sequence are drawn manually, the other contours of the sequence are computed automatically. This algorithm integrates the topological and geometrical cha... View full abstract»

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  • Analysis of the output spectrum for direct digital frequency synthesizers in the presence of phase truncation and finite arithmetic precision

    Publication Year: 2001, Page(s):458 - 463
    Cited by:  Papers (25)  |  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (440 KB) | HTML iconHTML

    A simple algorithm is presented for the calculation of the output spectrum of direct digital frequency synthesizers (DDFS) in the presence of phase accumulator truncation and finite arithmetic precision. Using no approximations, a simple formula calculates the magnitudes of the spurious noise frequencies (spurs) due to phase accumulator truncation and due to finite precision implementation. Their ... View full abstract»

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  • Architecture of a software system for scientific data visualisation

    Publication Year: 2001, Page(s):91 - 93
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (428 KB) | HTML iconHTML

    In this paper, after an enumeration of software for scientific computation and data visualisation, we give a set of demands for this sort of software. We discuss the architecture of a scientific data visualisation software system entitled “Graph Server” which was designed and developed by the authors. The examples of 2D/3D hodograph curve, 2D/3D histogram, 3D surface and 2D area are pr... View full abstract»

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