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)
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  • 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
  • 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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  • 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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  • 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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  • 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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  • 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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  • 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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  • Object-based intra-frame wavelet video coding

    Publication Year: 2001, Page(s):599 - 603
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract |PDF file iconPDF (856 KB) | HTML iconHTML

    An object-based wavelet-based video codec has been designed and implemented. The codec takes a colour video sequence of arbitrary size as input and performs intra-frame object-based compression on the sequence. Video sequences are segmented using an optic flow-based algorithm, before being transformed with a symmetrical wavelet transform, prior to Lloyd-Max quantisation and entropy encoding. A vid... 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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  • Extraction foreground in moving image

    Publication Year: 2001, Page(s):272 - 276
    IEEE is not the copyright holder of this material | Click to expandAbstract |PDF file iconPDF (336 KB) | HTML iconHTML

    Interactive media systems make it possible for users to extract information from an interactive environment by traditional computer vision techniques. This paper emphasizes the important modules in an interactive video application: extracting visual events. After analyzing and implementing the MIT technical report about identification and extraction of visual events, some problems of the algorithm... View full abstract»

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  • System functions with minimum time-bandwidth product based on the higher order moments

    Publication Year: 2001, Page(s):479 - 484
    IEEE is not the copyright holder of this material | Click to expandAbstract |PDF file iconPDF (320 KB) | HTML iconHTML

    Systems of finite order with minimum time-bandwidth products are considered. The time and frequency response spreads are defined by moments of the higher order in both domains. Minimizing the product of the moments, causal systems with the largest energy concentration in the time and frequency domain are obtained. The optimization is carried out for transfer functions up to the eighth order with t... View full abstract»

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  • Nonlinear filter design: methodologies and challenges

    Publication Year: 2001, Page(s):102 - 107
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract |PDF file iconPDF (484 KB) | HTML iconHTML

    Linear filtering techniques have serious limitations in dealing with signals that have been created or processed by a system exhibiting some degree of nonlinearity, or, in general, situations where the relevance of information cannot be specified in the frequency domain. In image processing, many of these characteristics are often present, and it is no wonder that image processing is the field whe... View full abstract»

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  • Constant gm rail-to-rail CMOS input stage with improved linearity

    Publication Year: 2001, Page(s):511 - 515
    Cited by:  Papers (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract |PDF file iconPDF (200 KB) | HTML iconHTML

    The classic CMOS differential amplifier has a strong nonlinearity for large values of the input voltage amplitude, so important odd-order distortion will appear for a sinusoidal input voltage. This paper presents a new original technique to improve the linearity of a CMOS differential amplifier by canceling the third and the fifth terms of the Taylor series of the output current. In order to obtai... View full abstract»

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  • Virtual dissection of the colon based on helical CT data-can it be done?

    Publication Year: 2001, Page(s):224 - 229
    IEEE is not the copyright holder of this material | Click to expandAbstract |PDF file iconPDF (1012 KB) | HTML iconHTML

    Colorectal cancer is the third most commonly diagnosed cancer; and colonic polyps are known precursors of that particular cancer. Virtual dissection refers to a display technique for polyp detection based on helical CT data, where the colon is dissected and flattened as on the pathologist's table. The approach and image processing as well as the early experience are described in this paper View full abstract»

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  • oSPIHT - embedded object-based SPIHT image coding

    Publication Year: 2001, Page(s):593 - 598
    IEEE is not the copyright holder of this material | Click to expandAbstract |PDF file iconPDF (688 KB) | HTML iconHTML

    We discuss an object-based wavelet image coding system utilizing the SPIHT codec as the core compression technique. Besides its high compression efficiency, our approach features an important aspect for object-based progressive transmission: although containing visual objects at various target bitrates the full embeddedness of the output bitstream is preserved. We demonstrate the functionality in ... View full abstract»

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  • Maximum likelihood contour estimation using beta-statistics in ultrasound images

    Publication Year: 2001, Page(s):207 - 212
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract |PDF file iconPDF (792 KB) | HTML iconHTML

    In this paper, we address the problem of detecting the contour of objects in speckled ultrasound images. A prior hypothesis is made on the first order statistics of the image intensity that is related to the shape of the objects: the mean and variance of the images can he non-stationary, but they should be invariant to the normalized distance from a particular point in the image to the contour cen... 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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  • Image sequence stabilisation: motion vector integration (MVI) versus frame position smoothing (FPS)

    Publication Year: 2001, Page(s):266 - 271
    Cited by:  Papers (24)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract |PDF file iconPDF (464 KB) | HTML iconHTML

    Image sequence stabilisation is the task of removing unwanted camera movements (jitter) from a video sequence. While these jitter can be translational, rotational or zoom based, translational cases have a larger influence on visual perception and are most likely to result in visual appearance degradation that will upset the viewer. While most of the research in the area of image stabilisation has ... View full abstract»

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  • Colour triplet-valued wavelets and splines

    Publication Year: 2001, Page(s):535 - 540
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract |PDF file iconPDF (380 KB) | HTML iconHTML

    The concept of colour and and multispectral image recognition connects all the topics we are considering. Colour (multispectral) image processing is investigated using an algebraic approach based on triplet numbers. In the algebraic approach, each image element is considered not as a 3D vector, but as a triplet number. The main goal of the paper is to show that triplet algebra can be used to solve... 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 (2)
    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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