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Proceedings of 3rd IEEE International Conference on Image Processing

19-19 Sept. 1996

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Displaying Results 1 - 25 of 263
  • International Conference on Image Processing

    Publication Year: 1996, Page(s):iii - xlv
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    Freely Available from IEEE
  • New subband geometries for image texture segmentation

    Publication Year: 1996, Page(s):971 - 974 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (626 KB)

    The usefulness of multichannel filtering for image texture segmentation has been demonstrated in the literature. Based on psychophysical studies, it has been largely believed that Gabor filters are optimal for segmentation. In this paper, the application of maximally decimated, non-separable, perfect reconstruction filter banks (subband systems) are investigated for texture segmentation. The subba... View full abstract»

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  • Effects of noise pre-filtering for codebook generation in vector quantization

    Publication Year: 1996, Page(s):455 - 458 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (704 KB)

    Encoding noisy data is a challenging problem in data compression. Recent results show that data compression and filtering are closely related. Exploiting these ideas, we propose a simple technique for vector quantization (VQ) coding of noisy images, based on pre-filtering only the training set prior to codebook design. We find that our technique results in significant improvement in image quality,... View full abstract»

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  • Automatic construction of image transformation processes using genetic algorithm

    Publication Year: 1996, Page(s):731 - 734 vol.3
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (340 KB)

    A method to approximate the image transformation from an original image to its ideally processed target image by a sequence of several image transformation filters is proposed in this paper. The ideally processed image is assumed to be generated manually by the use of drawing software. In this method, the order of applying image transformation filters is determined by a genetic algorithm. This met... View full abstract»

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  • Prediction error image coding using a modified stochastic vector quantization scheme

    Publication Year: 1996, Page(s):451 - 454 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (636 KB)

    The objective of this paper is to provide an efficient and yet simple method to encode the prediction error image of video sequences, based on a stochastic vector quantization (SVQ) approach that has been modified to cope with the intrinsic decorrelated nature of the prediction error image of video signals. In the SVQ scheme, the codewords are generated by stochastic techniques instead of being ge... View full abstract»

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  • Improving parameter space decomposition for the generalised Hough transform

    Publication Year: 1996, Page(s):627 - 630 vol.3
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (412 KB)

    The generalised Hough transform extracts arbitrary objects by using a non-analytic model shape representation obtained from gradient direction information. The main drawback of this technique is the excessive computational burden because of the four-dimensional parameter space required when orientation and scale are unknown. We present a novel representation of a model shape defined by the geometr... View full abstract»

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  • Unsupervised image segmentation based on the comparison of local and regional histograms

    Publication Year: 1996, Page(s):959 - 962 vol.3
    Cited by:  Papers (3)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (472 KB)

    This paper proposes an new method for unsupervised segmentation of images which does not rely on parametric modelling of the observed images. Furthermore, the problem of finding the number of image classes is carried out as an integral part of the segmentation process, rather than by resorting to goodness-of-fit cluster validation measures, such as AIC or MDL. A brief overview of the algorithm is ... View full abstract»

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  • Motion estimation and tracking for urban traffic monitoring

    Publication Year: 1996, Page(s):787 - 790 vol.3
    Cited by:  Papers (17)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (928 KB)

    The use of traffic monitoring techniques based on image processing algorithms for supervising urban vehicle flows could be very useful. Classical inductive loops can only compute traffic density on a single lane but are unable to estimate, for example, the behaviour of the vehicle flow at a crossroad. In this paper a system that estimates the turning rates at an urban crossroad by processing the s... View full abstract»

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  • Integration of color, shape, and texture for image annotation and retrieval

    Publication Year: 1996, Page(s):851 - 854 vol.3
    Cited by:  Papers (2)  |  Patents (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (544 KB)

    We present algorithms for automatic image annotation and retrieval based on pixel- or region-based color; region-based shape; and block- or region-based texture features and several schemes for integrating them. Automatic region selection is accomplished by integrating color and spatial edge features. Color, shape, and texture indexing may be knowledge-based (using appropriate training sets) or by... View full abstract»

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  • Efficient indexing method for lattice quantization applications

    Publication Year: 1996, Page(s):447 - 450 vol.3
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (260 KB)

    Indexing the codevectors is a key problem in lattice quantization applications. We propose a method based on the idea of a coding table encompassing a set of points chosen as small as possible and called the fundamental region. Our method works for both spherical and pyramidal codebooks. It provides a good tradeoff between computational complexity and storage requirements. Finally, it improves of ... View full abstract»

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  • `Pencigraphy' with AGC: joint parameter estimation in both domain and range of functions in same orbit of the projective-Wyckoff group

    Publication Year: 1996, Page(s):193 - 196 vol.3
    Cited by:  Papers (20)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (668 KB)

    Consider a static scene and fixed center of projection, about which a camera is free to zoom, pan, tilt, and rotate about its optical axis. With an ideal camera, the resulting images are in the same orbit of the projective group-action, and each pixel of each image provides a measurement of a ray of light passing through a common point-in space. Unfortunately, most modern cameras have a built in a... View full abstract»

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  • Towards a new framework of the Hough transform

    Publication Year: 1996, Page(s):623 - 626 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    This paper's main contributions are three-fold. Firstly, it is shown that the two existing template matching-like definitions of the Hough transform proposed by Princen, Illingworth and Kittler (1992) and by Bergen and Shvaytser (1991) are inadequate. The principal reason behind this is that the common implicit assumption of these two definitions, that every feature point within the template assoc... View full abstract»

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  • Integrated approach to texture segmentation using multiple Gabor filters

    Publication Year: 1996, Page(s):955 - 958 vol.3
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (688 KB)

    This paper presents an integrated approach using multiple Gabor filters for the segmentation of multi-textured images. The approach includes both the design of the constituent Gabor filters and the design of the classifier and postprocessing. The classifier uses a mixture density to reduce localization error at texture boundaries, and the postprocessing uses morphological operators to remove spuri... View full abstract»

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  • Correspondence analysis and hierarchical indexing for content-based image retrieval

    Publication Year: 1996, Page(s):859 - 862 vol.3
    Cited by:  Papers (6)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (500 KB)

    This paper describes a two-stage statistical approach supporting content-based search in image databases. The first stage performs correspondence analysis, a factor analysis method transforming image attributes into a reduced-size, uncorrelated factor space. The second stage performs ascendant hierarchical classification, an iterative clustering method which constructs a hierarchical index structu... View full abstract»

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  • Frame-free video

    Publication Year: 1996, Page(s):375 - 378 vol.3
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (900 KB)

    Current digital video representations emphasize compression efficiency, lacking some of the flexibility required for interactive manipulation of digital bitstreams. We present a video representation which can encompass both space and time, providing a temporally coherent description of video sequences. The video sequence is segmented into its component objects, and the trajectory of each object th... View full abstract»

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  • Fast vector quantizer using multiple sorted index tables

    Publication Year: 1996, Page(s):443 - 446 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    Vector quantization (VQ) is a widely used data compression technique which exploits the correlation of the neighbouring samples. To overcome the high computational complexity problem, several fast vector quantization (FVQ) algorithms have been proposed with the quality of the reconstructed images preserved. The efficiency of an FVQ using triangular inequality elimination (TIE) greatly depends on t... View full abstract»

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  • Image representation based on the affine symmetry group

    Publication Year: 1996, Page(s):189 - 192 vol.3
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (560 KB)

    The representation of 2-D signals which are symmetric under the affine group of transformations is considered. An extension of the multiresolution Fourier transform (MFT) is presented and shown to have a predictable redistribution of energy as a result of affine transformations of the input signal. An approximation based on the discrete MFT then forms the basis of a computationally efficient algor... View full abstract»

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  • Computing moments by prefix sums

    Publication Year: 1996, Page(s):619 - 622 vol.3
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (332 KB)

    The goal of many image processing tasks is to recognise objects, to match scenes and to classify images. The shape, gray or colour features of objects are mainly used to describe objects. The most efficient method used to describe such features of an object is to use various transformed moments. We express the moments as a linear combination of higher order prefix sums, obtained by iterating the p... View full abstract»

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  • Video indexing using optical flow field

    Publication Year: 1996, Page(s):831 - 834 vol.3
    Cited by:  Papers (22)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (428 KB)

    The increasing development of advanced multimedia applications requires new technologies for organizing and retrieving by content databases of digital video. Several content based features (color, texture, motion, etc.) are needed to perform a reliable content based retrieval. We present a method for automatic motion based video indexing and retrieval. A prototypal system has been developed to pro... View full abstract»

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  • A simple feedforward neural network architecture for 3-D motion and structure estimation

    Publication Year: 1996, Page(s):783 - 786 vol.3
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (316 KB)

    A simple feedforward neural network system which is especially designed to tackle the problem of 3-D motion and structure parameter estimation from 2-D optical flow parameters has been proposed. Each node and the weight of every connection adopted in the network has its explicit physical meaning. The network embraces a self tuning scheme with an unsupervised learning rule to control the dynamics o... View full abstract»

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  • Automatic detection of interest areas of an image or of a sequence of images

    Publication Year: 1996, Page(s):371 - 374 vol.3
    Cited by:  Papers (12)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    The tool introduced in this paper allows to automatically decide in an image or in a video sequence which regions are important and which ones are not. For this purpose, fuzzy logic has been used to modelize human subjective knowledge about the way to allocate priorities to regions. The resulting classification can be used in a wide range of applications going from image coding to image understand... View full abstract»

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  • A novel selective coding scheme based on layered structure

    Publication Year: 1996, Page(s):355 - 358 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    In this paper, we propose a novel selective coding scheme based on layered structure. The scheme has 4 functional blocks that are target extraction, first layer coder for background region (FLC), second layer coder for target region (SLC) and buffer controller. For the target extraction process, we use motion vector grouping and change detection techniques, and increase the extraction accuracy of ... View full abstract»

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  • Embedded object dictionaries for image database browsing and searching

    Publication Year: 1996, Page(s):875 - 878 vol.3
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1020 KB)

    We describe a technique to encode images for content-based access and retrieval. Potential query terms are first extracted from an image and represented in terms of multiresolution subbands. A vector quantizer structure then maps the subbands of each image object onto a set of embedded dictionaries. An algorithm is used to exploit the occurrence and query probabilities of the objects for efficient... View full abstract»

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  • The PASSWORDS Project [intelligent video image analysis system]

    Publication Year: 1996, Page(s):675 - 678 vol.3
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (444 KB)

    The objective of the PASSWORDS Project is to design and develop a prototype of an intelligent video image analysis system for video surveillance and security applications, based on concrete needs expressed by potential users. The goal of the system developed within PASSWORDS is to detect certain dangerous situations in some scenes (e.g. vandalism in a metro station), providing for example a remote... View full abstract»

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  • A vector quantizer for image restoration

    Publication Year: 1996, Page(s):439 - 441 vol.3
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (680 KB)

    An algorithm based on nonlinear interpolative vector quantization (NLIVQ) is presented which accomplishes image restoration concurrently with image compression. The algorithm is applied to the problem of deblurring noise-free diffraction-limited images by training with a large set of blurred and original image pairs. Simulation results demonstrate a quantitative improvement in images processed by ... View full abstract»

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