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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
  • Feature extraction from stochastic process samples

    Publication Year: 2001, Page(s):302 - 307
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (400 KB) | HTML iconHTML

    To analyse a stochastic process described by samples drawn from different classes, a method for automatic extraction of discriminant features in reduced dimension space is proposed. To be effective, dimension reduction should be achieved with minimum loss of information. The proposed method is based on the search for an optimal regression between representation space and feature space according to... View full abstract»

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  • MAWUPC algorithm for tracking face and hands in complex background

    Publication Year: 2001, Page(s):295 - 300
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (664 KB) | HTML iconHTML

    This paper proposes a new object tracking algorithm called the MAWUPC (motion adaptive weighted unmatched pixel count) algorithm for solving complex background and occlusion problems and for proposing a more effective combination of color and motion information. The proposed algorithm incorporates color transform, Kalman filter and UPC operation to make more effective a combination of color and mo... View full abstract»

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  • Global motion model based on B-spline wavelets: application to motion estimation and video indexing

    Publication Year: 2001, Page(s):289 - 294
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (504 KB) | HTML iconHTML

    This paper describes a framework to estimate a global motion model based on B-spline wavelets. The wavelet-based model allows optical flow to be recovered at different resolution levels from the image derivatives. By combining estimation from different resolution levels in a coarse to fine scheme, our algorithm is able to recover a large range of velocity magnitudes. Our algorithm is evaluated on ... View full abstract»

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  • Filtering echocardiographic image sequences in frequency domain

    Publication Year: 2001, Page(s):238 - 243
    Cited by:  Papers (1)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (520 KB) | HTML iconHTML

    This work describes a new method for filtering echocardiographic image sequences, based on the assumption of an almost periodic motion of the cardiac wall. Exploiting the knowledge of the regular motion of the heart can be advantageous with respect to classical filtering methods where no assumption is made on the image dynamics. From the ideal model of a pulsing ring, a mathematical description of... View full abstract»

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  • Some practical remarks about pattern recognition techniques applied to biomedical images

    Publication Year: 2001, Page(s):662 - 665
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (244 KB) | HTML iconHTML

    In order to analyze images for detecting and characterizing biomedical areas physicians are interested in, several pattern recognition procedures are available, but their value is constrained by the particular case taken in examination. The paper gives some suggestions for the choice View full abstract»

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  • Adapted nonlinear multiresolution decomposition with applications in progressive lossless image coding

    Publication Year: 2001, Page(s):609 - 613
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (372 KB) | HTML iconHTML

    We present an adapted nonlinear multiresolution decomposition (with some derivatives) of still images that permits perfect reconstruction. A hierarchical pyramidal decomposition with maximal decimation is used. For one level of decomposition, the input image I is partitioned into two subimages I1 and I2 obtained by downsampling. The subimage I1 is unchanged. The su... View full abstract»

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  • On digital signal smoothing by orthogonal polynomials

    Publication Year: 2001, Page(s):429 - 434
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (240 KB) | HTML iconHTML

    In this paper, a new procedure for constrained digital signal smoothing is presented. It is based on least-squares approximation of functions defined on an equidistant set of points by orthogonal polynomials. The digital signal smoothing is described by linear operators represented by circulant Toeplitz matrices with integer coefficients which can be efficiently realized View full abstract»

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  • Hardware-oriented region based algorithm for low power motion estimation

    Publication Year: 2001, Page(s):283 - 288
    Cited by:  Papers (3)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (384 KB) | HTML iconHTML

    Motion estimation is a fundamental step for high quality, low bandwidth video compression. Recently, the MPEG-4 group has proposed some low complexity algorithms. They have the same performance in term of PSNR as the full search algorithm, but at the same time the complexity is dramatically reduced. However it is difficult to realize these algorithms with conventional hardware structures. Here we ... View full abstract»

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  • Detecting planar homographies in an image pair

    Publication Year: 2001, Page(s):182 - 187
    Cited by:  Papers (38)  |  Patents (9)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1136 KB) | HTML iconHTML

    Because of their abundance and simplicity, planes are used in several computer vision tasks. Their simplicity results in that, under perspective projection, the transformation between a world plane and its corresponding image plane is projective linear, or a homography. These relations also hold between perspective views of a plane in different images. This paper proposes an algorithm that detects... View full abstract»

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  • On a new class of filters for the impulsive noise reduction in color images

    Publication Year: 2001, Page(s):114 - 118
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (664 KB) | HTML iconHTML

    In this paper, a new approach to the problem of impulsive noise reduction for color images is presented. The new image filtering technique is based on the maximization of the similarities between pixels in a predefined filtering window. The new method filters out the noise component, while adapting itself to the local image structures. In this way, the proposed algorithm is able to eliminate impul... View full abstract»

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  • Method of myocardial velocities measurements based on combination of echocardiography and Doppler tissue imaging

    Publication Year: 2001, Page(s):232 - 237
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (460 KB) | HTML iconHTML

    This paper describes a new and original strategy for measuring and characterising the left ventricular myocardial motion in terms of velocity measurements. Our method is based on the combination of echocardiographic images and Doppler tissue imaging. It allows decomposition of the complex myocardial wall velocity into three components: rotation, contraction and translation. The results are shown o... View full abstract»

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  • Internet-based medical teleconsultation system

    Publication Year: 2001, Page(s):657 - 661
    Cited by:  Papers (3)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (328 KB) | HTML iconHTML

    Rapid development of telecommunications networks has made possible development of telemedicine, and especially one of its segments, medical teleconsultation. We present a system which is designed to provide tools for establishing meaningful communication between general practitioner in dislocated areas and specialists typically located in large medical centers. The technological approach for imple... 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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  • 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 simple design of sparse signal representations using overlapping frames

    Publication Year: 2001, Page(s):424 - 428
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (336 KB) | HTML iconHTML

    The use of frames and matching pursuits for signal representation are receiving increased attention due to their perceived potential in various signal processing applications. Good design algorithms for block oriented frames have recently been published. Viewing these block oriented frames as generalizations of block oriented transforms, it is natural to seek corresponding generalizations of criti... View full abstract»

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  • A low-cost real-time tracker of live sport events

    Publication Year: 2001, Page(s):362 - 365
    Cited by:  Papers (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (564 KB) | HTML iconHTML

    We present a low-cost prototype system for real-time tracking of players during a sport event. The system was tested on recordings of a squash singles match. Two players are visible from a bird's eye perspective as they move around the squash court. System recovers the position of each of the players on each frame and presents the results in real time on the computer screen. A method for automatic... View full abstract»

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  • A multilevel neural network model for density volumes classification

    Publication Year: 2001, Page(s):213 - 218
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (524 KB) | HTML iconHTML

    The accurate detection of tissue density variation in CT/MRI brain datasets can be useful for analysing and monitoring pathologies with slight differences. In fact, the objective knowledge of density distribution can be related to anatomical structures and therefore the process of monitoring illness and its treatment can be improved. In this paper, we present an approach for the classification of ... View full abstract»

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  • Efficient object tracking in video sequences by means of LS-N-IPS

    Publication Year: 2001, Page(s):277 - 282
    Cited by:  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (596 KB) | HTML iconHTML

    A recently introduced particle filtering method, called LS-N-IPS (local search N-interacting particle system), is considered for tracking objects on video sequences. LS-N-IPS is a computationally efficient particle filter that performs better than the standard N-IPS particle filter, when observations are highly peaky, as is the case of visual object tracking problems with good observational models... View full abstract»

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  • Discrete cosine transforms on quantum computers

    Publication Year: 2001, Page(s):464 - 468
    Cited by:  Papers (15)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (264 KB) | HTML iconHTML

    A classical computer does not allow the calculation of a discrete cosine transform on N points in less than linear time. This trivial lower bound is no longer valid for a computer that takes advantage of quantum mechanical superposition, entanglement, and interference principles. In fact, we show that it is possible to realize the discrete cosine transforms and the discrete sine transforms of size... View full abstract»

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  • 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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