Signal Processing Proceedings, 1998. ICSP '98. 1998 Fourth International Conference on

12-16 Oct. 1998

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  • 1998 Fourth International Conference on Signal Processing ICSP '98

    Publication Year: 1998, Page(s):0_1 - xxvi
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    Freely Available from IEEE
  • A new watermarking method of digital audio content for copyright protection

    Publication Year: 1998, Page(s):1420 - 1423 vol.2
    Cited by:  Papers (10)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (327 KB)

    This paper describes a new watermarking algorithm for digital audio. The proposed algorithm permutes the host audio signal in the time domain and then embeds watermarks in the frequency domain. The key part of the algorithm is a secure and robust permutation operation. View full abstract»

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  • Scatterers' migration in ISAR imaging and compensation

    Publication Year: 1998, Page(s):1477 - 1480 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (348 KB)

    The range-Doppler (RD) method is the most commonly used method in ISAR imaging. To obtain a radar image of a target, a certain rotation angle of the target with respect to radar line of sight during the coherent integration interval is required. In such cases, there will be scatterer migration. Actually, scatterer migration through resolution cells (MTRC) will happen inevitably in high-resolution ... View full abstract»

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  • A new method for ISAR range-instantaneous-Doppler imaging

    Publication Year: 1998, Page(s):1481 - 1484 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB)

    The range-Doppler algorithm (RDA) is the common algorithm for a smoothly flying target in ISAR imaging, but the RDA is not suitable for manoeuvring targets. The range-instantaneous-Doppler (RID) algorithm, however, should be used in ISAR imaging when the target is manoeuvring. A new signal-component-adaptive short-time frequency estimation (SCASFE) technique is developed and used in the RID algori... View full abstract»

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  • Author index

    Publication Year: 1998, Page(s):1733 - 1742
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    Freely Available from IEEE
  • Estimation and detection of chirp signals in compound-Gaussian clutter

    Publication Year: 1998, Page(s):1658 - 1661 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (324 KB)

    The contribution of this paper is the derivation of a GLRT (generalized likelihood ratio test) detector and a suboptimal cyclic-correlation-based estimator of Doppler shift and Doppler rate, the chirp parameters, for a signal with fluctuating random amplitude embedded in correlated compound-Gaussian clutter. The hybrid Cramer-Rao lower bounds (HCRLBs) are also derived for a Swerling I target signa... View full abstract»

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  • A compression of ECG data based on neural network

    Publication Year: 1998, Page(s):1654 - 1657 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (268 KB)

    ECG data compression is one of the most important subjects arising in biosignal processing. If a backpropagation (BP) artificial neural network is adopted to compress ECG data, the compression precision speed is low. The system we established improves the speed. The system uses four filters to process ECG data for improving the quality of ECG signals, and adopts the improved first difference algor... View full abstract»

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  • Detection of multidimensional Gaussian random signals in compound-Gaussian clutter plus thermal noise

    Publication Year: 1998, Page(s):1650 - 1653 vol.2
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    In this work we derive two strategies for detecting a Gaussian distributed target signal, known to be confined to a given vector subspace, against a mixture of correlated compound-Gaussian clutter and white Gaussian thermal noise. Both the detectors are obtained as a generalization of the matched subspace filter approach and rely on the estimation of the local clutter power, the texture in the tec... View full abstract»

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  • Texture classification based on feature symbol random field

    Publication Year: 1998, Page(s):901 - 903 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (144 KB)

    This paper suggests a set of texture features based on a 2-D symbol description and the calculation of co-occurrence matrices. A hierarchical algorithm based on these features is also proposed. This algorithm gives out the correct classification rate as 96.5% while the algorithm based on the gray level co-occurrence matrix features as 67.5% and that based on the bank energies as 75% View full abstract»

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  • A watermarking method based on Fresnel diffraction

    Publication Year: 1998, Page(s):951 - 953 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB)

    The watermarking technology is a technique of embedding hidden multimedia information, such as images or sounds, specifically for a company or individual holding the copyright of the media. We propose a new method using a watermarking embedding method for the material with a method of processing based on Fresnel diffraction. A significant area of the original image is processed by Fresnel transfor... View full abstract»

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  • A digital realization of audio dynamic range control

    Publication Year: 1998, Page(s):1424 - 1427 vol.2
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB)

    A digital limiter/compressor/expander/noise gate with variable parameters for audio signals is presented. This is a feedforward side-chain system which uses a minimum gain method for selecting the section and generating the control gain and a first-order IIR filter for the attack and release processings. The static and dynamic characteristics are analysed, the function block diagram and the realiz... View full abstract»

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  • Detecting system and power-spectral analysis of pulse signals of human body

    Publication Year: 1998, Page(s):1646 - 1649 vol.2
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (236 KB)

    In this paper, in the light of three features of the human pulse signal, a non-contact-type detection system is designed, which can be used to detect pulse signals. The signal processing system suitable for the pulse signals is set up. The power spectra of the four kinds of pulse signals are obtained by using the fast Fourier transform (FFT) and the power-spectral characteristics are analyzed and ... View full abstract»

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  • Weighted statistical model for non-rigid image objects detection

    Publication Year: 1998, Page(s):897 - 900 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    A new weighted statistical model is presented for detecting non-rigid image targets. In the detection or matching stage, a modified GA (genetic algorithm) is presented to solve the problem of adaptability to scaling, position and tilted angles. We demonstrate our WSM model on the practical human face detection problem. Some results are presented View full abstract»

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  • Ambiguity function of chaotic phase modulated radar signals

    Publication Year: 1998, Page(s):1574 - 1577 vol.2
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (244 KB)

    This paper analyzes a kind of chaotic modulated signal, these phase modulated radar signals are generated by chaotic signals. The ambiguity function of the coded signals is also given. Theory and simulation results show that the ambiguity function of the chaotic modulated signals is approximately “thumbtack-shaped“ for the ideal result. Thus the signal has high resolution both in the t... View full abstract»

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  • Radar target recognition based on fuzzy clustering

    Publication Year: 1998, Page(s):1532 - 1535 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (208 KB)

    A new method of recognizing the aircraft number of a radar target from a narrowband IF signal of non-coherent radar is presented. According to the received narrowband IF echo signal, its autocorrelation matrix is computed. The feature vector is the eigenvalue of the autocorrelation matrix, and the orthogonal transformation is accomplished to remove the unnecessary information in the feature. The K... View full abstract»

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  • Bias field correction-based tissue classification of MR images of brain

    Publication Year: 1998, Page(s):948 - 950 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (184 KB)

    Segmentation of MR images into tissue classes is often required in clinical applications. But automatic segmentation and tissue classification can be hardly satisfactory because of the overlapped distribution of intensities between tissues. This paper describes a new method called adaptive segmentation that uses knowledge of tissue properties and intensity inhomogeneities to correct and segment mu... View full abstract»

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  • The use of WDM for timing synchronization in Rayleigh fading channel

    Publication Year: 1998, Page(s):1640 - 1645 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (500 KB)

    This paper describes the performance of the wave different method (WDM) for timing recovery in mobile radio communication. The mobile radio is modelled by the Rayleigh fading process where additive white Gaussian noise (AWGN), intersymbol interference (ISI) and timing jitter are assumed to be present. The study is based on computer simulation, and the effects of ISI and timing jitter at various ve... View full abstract»

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  • A grouped scale-adaptive phase-based stereo matching method

    Publication Year: 1998, Page(s):893 - 896 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (276 KB)

    Phase-based stereo matching algorithms are the state-of-the-art stereo techniques, which have the advantage of high accuracy, dense disparity map and parallel computing structure. As to the usual phase wraparound problem in the phase-based method, one way is to adopt a coarse-to-fine strategy, which is efficient but not robust; another is to exploit a scale-adaptive strategy, which is robust but i... View full abstract»

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  • The application of Q-th fractal dimension in data analysis

    Publication Year: 1998, Page(s):1570 - 1573 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (208 KB)

    In this paper we describe a method for the use of multi-fractal features to analyze radar clutter. We analyze the real experimental clutter data acquired from land radar, and compare the calculated results from the radar clutter data and radar echoe data. The results imply that to some degree the clutter series of the land radar is compatible with the fractal model. However, the curves of the obje... View full abstract»

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  • A robust tracker with real-time input estimation

    Publication Year: 1998, Page(s):1529 - 1531 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (160 KB)

    A modified input estimation approach for tracking a manoeuvering target is developed by Xinxi (1996). The equation of increment of acceleration is described as a first-order autoregressive process. The increment of acceleration is estimated in real time by the residual of a standard Kalman filter and then is used to codify the target states. It has a good tracking property for an abrupt and highly... View full abstract»

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  • Watermarking for digital images

    Publication Year: 1998, Page(s):944 - 947 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (280 KB)

    Digital watermarking has been proposed as a solution to the problem of copyright protection of multimedia documents in networked environments. It makes it possible to tightly associate a code (called a watermark) to an image allowing the identification of the data creator, owner and so on. In this paper, we give a brief review of current research on digital image watermarking View full abstract»

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  • Piezoelectric signals of layered systems driven by elastic waves

    Publication Year: 1998, Page(s):1416 - 1419 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (284 KB)

    An incident elastic wave propagating in a cubic piezoelectric multilayer system, along to the direction of growth, and the reflected elastic wave in the system form an elastic standing wave inside after interference. The elastic standing wave induces a standing wave of strains, which results in a standing wave of piezoelectric fields. The field will produce an AC voltage signal across the system a... View full abstract»

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  • On modeling nonstationary geomagnetic signal

    Publication Year: 1998, Page(s):1593 - 1596 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (228 KB)

    Based on the smoothness priors constraint, an approach for modeling time series with nonstationary mean is employed in analyzing geomagnetic data during earthquakes. The overall model is fitted by using the Bayesian idea, the Kalman filter and Akeike's AIC modeling criterion. The trends and irregular components of geomagnetic signals during earthquakes can be modeled simultaneously and the spectru... View full abstract»

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  • Spectrum analysis using a trellis algorithm

    Publication Year: 1998, Page(s):1636 - 1639 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (264 KB)

    Carrier frequency offset is a significant problem in achieving signal acquisition in communications equipment. In a receiver the frequency offset must be corrected before symbol timing and phase recovery operations can be completed. Several methods have been applied to frequency estimation, for example, the fast Fourier transform (FFT) method and the differential phase method. However, the FFT met... View full abstract»

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  • Locating facial features with color information

    Publication Year: 1998, Page(s):889 - 892 vol.2
    Cited by:  Papers (4)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (220 KB)

    In the present paper we suggest a new method for inferring the face location and scale from the color information. At first facial region segmentation is performed with the vertical projection of the gray level pixel value. Second a horizontal projection can be used to localize the vertical edges of the eyes. Within the borders of the eyes we use a gradient decomposed Hough transform to find eye c... View full abstract»

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