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Image and Signal Processing and Analysis, 2001. ISPA 2001. Proceedings of the 2nd International Symposium on

Date 19-21 June 2001

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Displaying Results 1 - 25 of 117
  • 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
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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
  • Optimal curvature-compensated BiCMOS bandgap reference

    Publication Year: 2001, Page(s):507 - 510
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (172 KB) | HTML iconHTML

    A bandgap voltage reference with a circuit providing compensation of the thermal nonlinearity for the base emitter voltage is described. The temperature dependence of VBE(T) is linearized using, as the bias current, a current which is proportional with the n-th degree of absolute temperature. Theoretical calculations show that the thermal instability of the output reference voltage can ... 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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  • Pattern recognition approach to customer analysis

    Publication Year: 2001, Page(s):325 - 329
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (364 KB) | HTML iconHTML

    This paper shows how to apply pattern recognition techniques to select products to sell to bank clients. The paper describes a method to select appropriate financial products to be offered to their existing clients. Cross selling is an important application of data mining for any company that offers its customers a wide range of products or services. Offering and selling more products to the exist... View full abstract»

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  • Depth-assisted edge detection via layered scale-based smoothing

    Publication Year: 2001, Page(s):149 - 154
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (596 KB) | HTML iconHTML

    This paper deals with the subject of using depth data to aid the process of edge detection. Edge detection and stereo vision have had a long and abiding relationship, with several implementations of correspondence algorithms depending on edge detection techniques for robustness. The inverse however, has rarely been addressed. What if human vision utilizes stereoscopy (and hence, depth information)... View full abstract»

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  • Structural subband decomposition: a new concept in digital signal processing

    Publication Year: 2001
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (28 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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  • 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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  • Machine vision technology take-up in industrial applications

    Publication Year: 2001, Page(s):332 - 338
    Cited by:  Papers (6)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (688 KB) | HTML iconHTML

    Machine vision technology entered industrial application in the early 1970s, but due to high computing costs penetration has been limited. The machine vision business is pretty fragmented and the small technology companies are seeking repeat business in narrow business segments. Many new application areas with risks involved remain unsolved, because technology companies are not willing to carry th... View full abstract»

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  • Two-stage CMA blind multiuser detection for DS-CDMA systems in multipath fading

    Publication Year: 2001, Page(s):622 - 627
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (432 KB) | HTML iconHTML

    We consider the problem of mitigating intersymbol interference (ISI) due to multipath fading as well as multiple-access interference (MAI) in direct sequence code-division multiple-access (DS-CDMA) systems. The proposed multiuser receiver is based on the constant-modulus algorithm (CMA), which is known to provide satisfactory performance in a blind setting. In order to overcome the CMA interferenc... View full abstract»

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  • Texture based classification and segmentation using the Laguerre-Gauss transform

    Publication Year: 2001, Page(s):155 - 158
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (336 KB) | HTML iconHTML

    In this paper, we introduce a new tool for the image segmentation problem. For this purpose, we have developed a texture based segmentation and classification strategy based on a representation of the image components by a family of circular harmonic functions (CHF) defining the Laguerre-Gauss transform (LGT). LGT is the polar counterpart of the Hermite transform. By utilizing the outputs of CHF o... 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
    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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  • 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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  • Convolution operation implemented in FPGA structures for real-time image processing

    Publication Year: 2001, Page(s):417 - 422
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (432 KB) | HTML iconHTML

    Addition is an essential operation for convolution (or FIR filters). In FPGAs, addition should be carried out in a standard way employing ripple-carry adders (rather than carry-save adders), which complicates the search for an optimal adder structure as routing order has a substantial influence on the addition cost. Further, complex parameters of addition inputs have been considered e.g. correlati... 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 (2)
    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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  • A neural network facial expression recognition system using unsupervised local processing

    Publication Year: 2001, Page(s):628 - 632
    Cited by:  Papers (10)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (520 KB) | HTML iconHTML

    A local unsupervised processing stage is inserted within a neural network constructed to recognize facial expressions. The stage is applied in order to reduce the dimensionality of the input data while preserving some topological structure. The receptive fields of the neurons in the first hidden layer self-organize according to a local energy function, taking into account the variance of the input... View full abstract»

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  • Neuro-fuzzy filters based on recursive processing and genetic learning

    Publication Year: 2001, Page(s):108 - 113
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (620 KB) | HTML iconHTML

    Neuro-fuzzy filters based on genetic learning are a recently introduced class of nonlinear operators that aim at exploiting the powerful paradigms of computational intelligence. These filters adopt fuzzy reasoning to model the noise removal process and then perform an effective noise cancellation without blurring the image details. In this paper, we focus on the latest generation of neuro-fuzzy fi... View full abstract»

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  • Fast classical and quantum fractional Walsh transforms

    Publication Year: 2001, Page(s):558 - 563
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (368 KB) | HTML iconHTML

    The fractional Fourier transform (FRFT) is one-parametric generalization of the classical Fourier transform. FRFT was introduced in the 1980s and found a lot of applications in signal processing. The time and spectral domains are both special cases of the fractional Fourier domain. They correspond to the Oth and 1st functional Fourier domains, respectively. We introduce the classical and quantum f... View full abstract»

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  • 3D fractal compression for real-time video

    Publication Year: 2001, Page(s):570 - 573
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (308 KB) | HTML iconHTML

    A method of image sequence encoding is presented, based on fractal compression of 3D data blocks without searching. A simple fractal transform scheme is used that only depends on one real-valued coefficient. We have developed a software codec for the Windows95 operating system, that carries out video streams in real-time. The method can be further developed for application to videoconferencing, vi... View full abstract»

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  • Suppressing the system error in the measurement model of the prediction-based object recognition algorithm: ovarian follicle detection case

    Publication Year: 2001, Page(s):196 - 201
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (484 KB) | HTML iconHTML

    A heuristic procedure for suppressing system error in the measurement model of a prediction algorithm is presented. This error is suppressed by modifying the measurements. The procedure consists of two steps. Firstly the decision whether a measurement should be modified or nor is taken, and secondly, the measurement is actually modified. Mathematical mechanisms are developed for an integration of ... View full abstract»

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  • A computational allegory for V1

    Publication Year: 2001, Page(s):639 - 644
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1364 KB) | HTML iconHTML

    This contribution introduces a computational allegory for V1 in the task of static image coding. It can be considered an extrapolation of previous V1 models based on unsupervised learning but envisaging two new objectives. The first is a contribution to the discussion of the quantity of V1 cells. The second is the estimation of the quantity of cells within a V1 hypercolumn needed to present to hig... 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
    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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  • 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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  • A computer-aided test for the characterization of parasitic oscillations in IIR digital filters

    Publication Year: 2001, Page(s):475 - 478
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (288 KB) | HTML iconHTML

    In this paper, an algorithm that can be utilized to determine the behaviour of limit cycles in a fixed-point digital filter is given. Also, this paper presents the formulation used to describe the filters in order to evaluate any actual realization, order, type of quantization and the precision of the accumulator. Actual bounds on the amplitude, period and output of limit cycles are developed. It ... View full abstract»

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  • Support vector machines on the space of Walsh functions and their properties

    Publication Year: 2001, Page(s):43 - 48
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (384 KB) | HTML iconHTML

    Support vector machine is a special kind of learning machine, proposed by Vapnik. The learning capability of support vector machines depends on the Vapnik-Chervonenkis (VC) dimension of the kernel function used. In this paper, we construct a new kernel function for support vector machine, which is based on Walsh functions. We prove some theoretical results related to the VC-dimension of the suppor... View full abstract»

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