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Proceedings of 3rd IEEE International Conference on Image Processing

19-19 Sept. 1996

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  • 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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  • Optimal parameter choice for a class of cubic interpolation kernels and the associated error analysis

    Publication Year: 1996, Page(s):723 - 726 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (264 KB)

    Two issues related to a class of cubic kernels for interpolation with a single free parameter are addressed in this paper. The first issue relates to parametrizing the cubic interpolation kernel optimally for arbitrary kernel length keeping in view the need to cancel all error terms up to the second order. This builds upon the results of Keys (1981) where the optimal parameter value is obtained on... View full abstract»

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  • Human face classification for security system

    Publication Year: 1996, Page(s):479 - 482 vol.3
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (428 KB)

    We propose a method for classifying faces that uses only simple image processing. The method can rapidly judge whether the person detected by a monitor camera is masked or not. Our algorithm has two stages. The first stage detects the facial pattern by template matching with a new similarity assessment. The second stage judges whether the face is masked or not by using optimal features in the spat... View full abstract»

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  • Smoothing of SAR image speckle noise by multiplicative point estimation filters

    Publication Year: 1996, Page(s):907 - 910 vol.3
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (796 KB)

    This paper investigates the smoothing of speckle noise in synthetic aperture radar (SAR) images using the multiplicative point estimator, a locally adaptive form of the homomorphic filter. The filter adaptation is based on an assumed probability model for speckle noise. Speckle smoothing results for mixed terrain airborne SAR images are presented View full abstract»

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  • An algorithm for FOE localization

    Publication Year: 1996, Page(s):811 - 814 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (356 KB)

    An analytical procedure for the estimation of the focus of expansion (FOE) location is introduced. The method is applied to a vector field that has been obtained from the analysis of the relative translational movement of a rigid body with respect to the acquiring camera (monocular system). Two basic properties of complex differentiation theory are applied, assuming that each vector of the optic f... View full abstract»

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  • Irregular image sub-sampling and reconstruction by adaptive sampling

    Publication Year: 1996, Page(s):379 - 382 vol.3
    Cited by:  Papers (5)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    An irregular adaptive sampling algorithm for a compact image representation is presented. A scattered data interpolation algorithm based on an inverse distance weighted method has been chosen. The goal is to compute the values and the locations of a fixed number of samples to approximate efficiently a natural grey-level image. These values are found by the means of a relaxation process. In the con... View full abstract»

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  • Face perspective understanding using artificial neural network group-based tree

    Publication Year: 1996, Page(s):475 - 478 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (388 KB)

    Recent artificial neural network research has focused on simple models, but such models have not been very successful in describing complex systems (such as face perspective understanding). This paper presents the artificial neural network group-based tree (NGT) model, along with test results under laboratory conditions for face perspective understanding, suitable for use in an airport security sy... View full abstract»

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  • Multiscale segmentation and anomaly enhancement of SAR imagery

    Publication Year: 1996, Page(s):903 - 906 vol.3
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (576 KB)

    We present an efficient multiscale approach to the segmentation of natural clutter, specifically grass and forest, in synthetic aperture imagery (SAR) and to the enhancement of anomalous image regions therein. The methods we propose exploit the coherent nature of SAR sensors. In particular, they characterize the scale-to-scale statistical differences in imagery of various terrain categories due to... View full abstract»

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  • A new fast algorithm using an adaptative structuring element applied to a counting device

    Publication Year: 1996, Page(s):57 - 60 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    This paper presents a new image processing approach using size and shape varying structuring element. This approach is used to analyse image sequences of pedestrians walking in an indoor corridor of a transport system. The algorithm counts in real time the pedestrians entering or leaving this transport system. For this application a new technology for the acquisition of the images has been develop... 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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  • 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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  • Eigen-points [image matching]

    Publication Year: 1996, Page(s):471 - 474 vol.3
    Cited by:  Papers (12)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1160 KB)

    Eigen-points places control points onto unmarked images. The control points are the image locations corresponding to fiduciary points on an object. For example, we might designate ten points on the outside boundary of the lip as fiduciary points on a face. Then, the control points mark the image locations where those points on the outside lip boundary appear. The control-point locations are estima... 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 (10)
    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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  • Camera motion parameter recovery under perspective projection

    Publication Year: 1996, Page(s):807 - 810 vol.3
    Cited by:  Papers (7)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (324 KB)

    We present a very simple solution of the motion recovery problem using the displacement map produced by a camera moving in a stationary environment under the perspective projection assumption. If the motion equations hold exactly (ideal case), the solution is derived immediately from the singular value decomposition (SVD) of a linear system matrix. In the ideal case the rank of the matrix indicate... View full abstract»

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  • Segmentation of nautical chart components using mathematical morphology

    Publication Year: 1996, Page(s):53 - 56 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB)

    This paper presents some procedures for segmenting nautical charts using concepts of mathematical morphology. The method discussed, based on the multi-angled parallelism, is capable of extracting overlapped connected components such as lakes, isolines, railways, canals, small symbols and strings of characters. The problem of connectivity is solved using geodesic operations. The procedures have bee... 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 (10)  |  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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  • An approach to region coding for content-based scalable video

    Publication Year: 1996, Page(s):399 - 402 vol.3
    Cited by:  Papers (1)  |  Patents (21)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (520 KB)

    We propose a scheme for coding sub-regions in video scenes to provide content-based scalable video. For each region, a special color is used to represent the non-object area, and the resulting frames are coded using conventional video coding algorithms. At the decoder, the region shape is recovered based on chroma keying, and hence content-based manipulations are made possible. A number of techniq... View full abstract»

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  • Extracting line features from synthetic aperture radar (SAR) scenes using a Markov random field model

    Publication Year: 1996, Page(s):883 - 886 vol.3
    Cited by:  Papers (12)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (640 KB)

    Due to the speckle effect of coherent imaging the detection of lines in SAR scenes is considerably move difficult than in optical images. A new approach to detect lines in noisy images using a Markov random field (MRF) model and Bayesian classification is proposed. The unobservable object classes of single pixels are assumed to fulfil the Markov condition, i.e. to depend on the object classes of n... View full abstract»

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  • Automatic construction of 3D human face models based on 2D images

    Publication Year: 1996, Page(s):467 - 470 vol.3
    Cited by:  Papers (17)  |  Patents (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (540 KB)

    In order to achieve low bit-rate video coding, model-based coding systems have attracted great interests in visual telecommunications, e.g., videophone and teleconferencing where the human faces are the major part in the scenes. The main idea of this approach is to construct a 3D model for human face. Only the moving parts on the face are analyzed and the motion parameters are transmitted, finally... View full abstract»

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  • Edge-preserving classification of multifrequency multipolarization SAR images

    Publication Year: 1996, Page(s):899 - 902 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    Two edge-preserving segmentation algorithms for multiband images are proposed in this paper. In particular, when dealing with multipolarization SAR data, adaptive neighborhood structures are selected for modelling polarimetric complex amplitudes and region labels, and for achieving detail-preservation. Experimental results show that the novel schemes produce significant visual improvements for det... View full abstract»

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  • Motion characterization of unrigid objects by detecting and tracking feature points

    Publication Year: 1996, Page(s):803 - 806 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (532 KB)

    A new algorithm to determine the motion of unnrigid objects like smoke clouds is presented. It consists of two parts. The first one is the localisation of edges and feature points along them. The wavelet transform is used for each of these localisations. The determination of feature points is done through the characterisation of a quantity related to Lipschitz exponents. The second part is the tra... View full abstract»

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  • A segmentation-based coding system allowing manipulation of objects (SESAME)

    Publication Year: 1996, Page(s):679 - 682 vol.3
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (696 KB)

    We present a coding scheme that achieves, for each image in the sequence, the best segmentation in terms of rate-distortion theory. It is obtained from a set of initial regions and a set of available coding techniques. The segmentation combines spatial and motion criteria. It selects at each area of the image the most adequate criterion for defining a partition in order to obtain the best compromi... View full abstract»

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  • Detection of rotation and parallel translation using Hough and Fourier transforms

    Publication Year: 1996, Page(s):827 - 830 vol.3
    Cited by:  Papers (12)  |  Patents (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB)

    This paper proposes a method of, given a multilevel image called a reference image in which an arbitrary shape S lies and another multilevel image called an input image in which one shape rotated and parallel translated from S lies, computing the angle of rotation and the quantity of parallel translation. This method applies a modified version of the Hough transform proposed by O'Gorman and Clowes... View full abstract»

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  • Recursive estimation of illuminant motion from flow field

    Publication Year: 1996, Page(s):771 - 774 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    We consider the problem of estimating the motion of a light source, given a sequence of images of a stationary, unknown object illuminated by it. The apparent flow field induced on the image plane is used to recover the motion parameters. The motion is assumed to be uniform between the successive image frames. A recursive total least squares estimator is developed to track the motion of the illumi... View full abstract»

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