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1999 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings. ICASSP99 (Cat. No.99CH36258)

15-19 March 1999

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  • 1999 IEEE International Conference on Acoustics, Speech, and Signal Processing [front matter]

    Publication Year: 1999, Page(s):i - lxiii
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  • Multi-channel high resolution blind image restoration

    Publication Year: 1999, Page(s):3229 - 3232 vol.6
    Cited by:  Papers (2)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    We address the reconstruction problem of a high resolution image from its undersampled measurements across multiple FIR channels with unknown response. Our method consists of two stages: blind multi-input multi-output (MIMO) deconvolution using FIR filters and blind separation of mixed polyphase components. The proposed deconvolution method is based on the mutually referenced equalizers (MRE) algo... View full abstract»

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  • Author index

    Publication Year: 1999, Page(s):a1 - a13
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    Freely Available from IEEE
  • Data efficient implementation of UWBWA SAR algorithms

    Publication Year: 1999, Page(s):3525 - 3528 vol.6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB)

    It is shown that the particular form of the frequency support of raw data and focused imagery obtained from an ultra-wideband, wide beamwidth synthetic aperture radar system can be exploited in nonseparable sampling schemes to reduce the overall amount of raw data samples and image pixels that need to be stored and computed. Furthermore, it is demonstrated that the constant integration angle backp... View full abstract»

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  • Inter mode vertex-based optimal shape coding

    Publication Year: 1999, Page(s):3125 - 3128 vol.6
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB)

    This paper investigates the problem of optimal lossy encoding of object contours in the inter mode. Contours are approximated by connected second-order spline segments, each defined by three consecutive control points. Taking into account correlations in the temporal direction, control points are chosen optimally in the rate-distortion sense. Applying motion to contours in the reference frame foll... View full abstract»

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  • Estimating crowd density with Minkowski fractal dimension

    Publication Year: 1999, Page(s):3521 - 3524 vol.6
    Cited by:  Papers (43)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB)

    The estimation of the number of people in an area under surveillance is very important for the problem of crowd monitoring. When an area reaches an occupation level greater than the projected one, people's safety can be in danger. This paper describes a new technique for crowd density estimation based on Minkowski fractal dimension. The fractal dimension has been widely used to characterize data t... View full abstract»

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  • Image reconstruction with two-dimensional piecewise polynomial convolution

    Publication Year: 1999, Page(s):3237 - 3240 vol.6
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (220 KB)

    This paper describes two-dimensional, non-separable, piecewise polynomial convolution for image reconstruction. We investigate a two-parameter kernel with support [-2,2]×[-2,2] and constrained for smooth reconstruction. The performance reconstructing a sampled random Markov field is superior to the traditional one-dimensional cubic convolution algorithm View full abstract»

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  • Making music with MATLAB: an electronic music synthesis course for engineering students

    Publication Year: 1999, Page(s):3581 - 3584 vol.6
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (216 KB)

    An elective course in electronic music synthesis has been developed for electrical and computer engineering students. The course provides an interesting way to integrate and apply DSP and computer manipulation concepts studied in previous courses, and extends student understanding of more advanced concepts such as time-evolving spectra. MATLAB is a standard platform used in the signals and DSP cou... View full abstract»

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  • Modified fuzzy c-mean in medical image segmentation

    Publication Year: 1999, Page(s):3429 - 3432 vol.6
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (332 KB)

    This paper describes the application of fuzzy set theory in medical imaging, namely the segmentation of brain images. We propose a fully automatic technique to obtain image clusters. A modified fuzzy c-mean (FCM) classification algorithm is used to provide a fuzzy partition. Our new method, inspired from the Markov random field (MRF), is less sensitive to noise as it filters the image while cluste... View full abstract»

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  • Coding of an arbitrarily shaped interlaced video in MPEG-4

    Publication Year: 1999, Page(s):3121 - 3124 vol.6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (356 KB)

    The coding method in MPEG-4 for interlaced video is introduced in this paper. Such a method is an extension of MPEG-2 interlaced coding tools to allow compression of arbitrarily shaped interlaced video. The new texture-and-shape coding tools discussed here for arbitrarily shaped interlaced video provide good compression performance. It is demonstrated here that these interlaced tools improve the c... View full abstract»

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  • New hardware-efficient algorithm and architecture for the computation of 2-D DCT on a linear systolic array

    Publication Year: 1999, Page(s):3517 - 3520 vol.6
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB)

    A new recursive algorithm for fast computation of two-dimensional discrete cosine transforms (2-D DCT) is derived by converting the 2-D data matrices into 1-D vectors and then using different partition methods for the time and frequency indices. The algorithm first computes the 2-D complex DCT (2-D CCT) and then produces two 2-D DCT outputs simultaneously through a post-addition step. The decompos... View full abstract»

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  • Filter bank optimization for high-dimensional compression of pre-stack seismic data

    Publication Year: 1999, Page(s):3153 - 3156 vol.6
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (416 KB)

    A multi-dimensional variable-length subband coder for prestack seismic data was presented. A 2-D and 3-D separable near perfect reconstruction filter bank was optimized to maximize the coding gain, assuming that the correlation properties of pre-stack seismic data can be modeled by directional dependent autoregressive processes. Identical quantization and entropy coder allocation strategies were u... View full abstract»

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  • A multiresolution image restoration method for photon imaging systems

    Publication Year: 1999, Page(s):3401 - 3404 vol.6
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (340 KB)

    Nuclear medicine imaging systems rely on photon detection as the basis of image formation. One of the major sources of error in these imaging systems is Poisson noise. In this paper, we develop a novel multiscale image restoration procedure for photon imaging systems. It consists in separating in the wavelet-domain data points which belong to structures from those due to the noisy background. The ... View full abstract»

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  • The developmental approach to multimedia speech learning

    Publication Year: 1999, Page(s):3093 - 3096 vol.6
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    This paper introduces the developmental approach to speech learning, motivated by human cognitive development from infancy to adulthood. Central in the developmental approach is what is called the developmental algorithm. We introduce AA-learning as a basic learning mode for our developmental algorithm. The developmental algorithm enables the system to learn new tasks without a need of reprogrammi... View full abstract»

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  • Hierarchical classification of audio data for archiving and retrieving

    Publication Year: 1999, Page(s):3001 - 3004 vol.6
    Cited by:  Papers (36)  |  Patents (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (396 KB)

    A hierarchical system for audio classification and retrieval based on audio content analysis is presented in this paper. The system consists of three stages. The first stage is called the coarse-level audio classification and segmentation, where audio recordings are classified and segmented into speech, music, several types of environmental sounds, and silence, based on morphological and statistic... View full abstract»

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  • A comparative study between parametric blur estimation methods

    Publication Year: 1999, Page(s):3233 - 3236 vol.6
    Cited by:  Papers (9)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (372 KB)

    In pattern recognition problems, the effectiveness of the analysis depends heavily on the quality of the image to be processed. This image may be blurred and/or noisy and the goal of digital image restoration is to find an estimate of the original image. A fundamental issue in this process is the blur estimation. When the blur is not readily available, it has to be estimated from the observed imag... View full abstract»

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  • Wavelet-based image coder with channel-optimized trellis-coded quantization

    Publication Year: 1999, Page(s):3201 - 3204 vol.6
    Cited by:  Papers (3)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (436 KB)

    This paper presents a wavelet-based image coder optimized for transmission over binary symmetric channels (BSC). The proposed coder uses a channel-optimized trellis-coded quantization (COTCQ) stage that is designed to optimize the image coding based on the channel characteristics. This optimization is performed only at the level of the source encoder, and does not include any channel coding for er... View full abstract»

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  • Multiframe integration via the projective transformation with automated block matching feature point selection

    Publication Year: 1999, Page(s):3265 - 3268 vol.6
    Cited by:  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (424 KB)

    A subpixel-resolution image registration algorithm based on the nonlinear projective transformation model is proposed to account for camera translation, rotation, zoom, pan, and tilt. Typically, parameter estimation techniques for transformation models require the user to manually select feature points between the images undergoing registration. In this research, block matching is used to automati... View full abstract»

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  • Motion-driven object segmentation in scale-space

    Publication Year: 1999, Page(s):3473 - 3476 vol.6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    In this paper we present a method for motion segmentation, in which accurate grouping of pixels undergoing the same motion is targeted. In the presented technique true object edges are first obtained by combining anisotropic diffusion of the original image with edge detection and contour reconstruction in the inherent scale-space. Contours are then matched according to the distance given by a metr... View full abstract»

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  • Scale detection based on statistical characteristics of edges in the scale space

    Publication Year: 1999, Page(s):3297 - 3300 vol.6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (340 KB)

    A study of the behavior of edges in the scale space is presented in this paper. Three statistical parameters, intensity average, root-mean-square, and variance of pixel intensity in edge images are used as the basis for evaluating visual quality of edge images. A parametric family of edge images containing edge information at several scales is used to create the edge statistic curves. It is found ... View full abstract»

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  • Reinforcing the understanding of signal processing concepts using audio exercises

    Publication Year: 1999, Page(s):3577 - 3580 vol.6
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (396 KB)

    In the near future, multimedia techniques will be used more extensively in signal processing education because the technology is available and the benefits to student learning and information retention are high. Using a variety of teaching techniques helps a wider range of students, who have different learning styles, and enhances student skills in their weaker areas. This paper describes a number... View full abstract»

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  • Video content extraction and representation using a joint audio and video processing

    Publication Year: 1999, Page(s):3033 - 3036 vol.6
    Cited by:  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    Computer technology allows for large collections of digital archived material. At the same time, the increasing availability of potentially interesting data makes difficult the retrieval of desired information. Currently, access to such information is limited to textual queries or characteristics such as color or texture. The demand for new solutions allowing common users to easily access, store a... View full abstract»

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  • Embedded optical flow motion compensation and finite state hierarchical vector quantization

    Publication Year: 1999, Page(s):3373 - 3376 vol.6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    We propose a video coding and delivery scheme which is geared towards low bit-rate and real-time performance requirements. We use a finite state wavelet-based hierarchical lookup vector quantization (FSWHVQ) scheme, which embeds the optical flow calculations in table-lookups. This video coding scheme is both fast (table-lookups) and accurate (dense motion field), and avoids the blocking artifacts ... View full abstract»

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  • Physics-based classification of targets in SAR imagery using subaperture sequences

    Publication Year: 1999, Page(s):3341 - 3344 vol.6
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (356 KB)

    It is well known that radar scattering from an illuminated object is often highly aspect dependent. We have developed a multiaspect target classification technique for SAR imagery that incorporates matching-pursuits feature extraction from each of a sequence of subaperture images, in conjunction with a hidden Markov model that explicitly incorporates the target-sensor motion represented by the ima... View full abstract»

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  • A genetic algorithm based image segmentation for image analysis

    Publication Year: 1999, Page(s):3445 - 3448 vol.6
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (292 KB)

    A new genetic algorithm (GA) based image segmentation method is proposed for image analysis. This method using a mean square error (MSE) based criterion can segment an image into some regions, while estimating a suitable region representation. The criterion is defined as MSE caused by interpolating each region of an observed image with a parametric model. Since the criterion is expressed with not ... View full abstract»

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