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Image Processing and its Applications, 1989., Third International Conference on

Date 18-20 July 1989

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Displaying Results 1 - 25 of 143
  • An intelligent system for automatic fire detection in forests

    Publication Year: 1989, Page(s):563 - 570
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (310 KB)

    The use of smoke-analysis is described for fire detection by means of suitably placed standard TV cameras. The paper first gives the smoke detection technique and discusses a method to obtain a suitable description of the scene. Then the intelligent part of the system is described and the methods and heuristics to speed-up the decision process discussed. The sub-system devoted to the translation o... View full abstract»

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  • Performance analysis of image registration techniques

    Publication Year: 1989, Page(s):10 - 13
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (328 KB)

    Discussed various important topics in image registration. Special emphasis has been placed on local methods and the issue of computational efficiency. The time factor is crucial, not only in many real-time applications, but also in all applications in which interactive registration is more appropriate and effective. There are a number of questions concerning optimal registration which remain to be... View full abstract»

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  • Three-dimensional range acquisition of line-like objects

    Publication Year: 1989, Page(s):14 - 18
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (280 KB)

    Presents a new technique for three-dimensional (3D) range acquisition of line-like objects. The objects are illuminated sequentially by three point light sources causing shadow lines on a working plane. These shadow lines are extracted from images of the scene by a robust image preprocessing procedure. Along the images of epipolar lines defined by the geometrical configuration of light sources, ca... View full abstract»

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  • A multiresolution stereopsis algorithm based on the Gabor representation

    Publication Year: 1989, Page(s):19 - 22
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (268 KB)

    A new approach to the stereopsis problem, based on the frequency domain has been described. It has been shown that a multiresolution `coarse-fine' algorithm, based on a spatially localised frequency domain (Gabor) representation, can lead to unbiased depth estimates and is capable of being implemented in a fast algorithm, using a pyramidal image representation. The performance of the algorithm has... View full abstract»

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  • Interframe image coding with 3-dimensional edge detection

    Publication Year: 1989, Page(s):541 - 545
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (276 KB)

    A new predictor has been developed for interframe image coding. This predictor uses a three-dimensional edge detection technique to predict the present pixel from the three previous frames. The assumption in this research is that the motion is approximately linear within a few frames in the normal videophone sequences. The three-dimensional (spatio-temporal) gradient vector is estimated, using thr... View full abstract»

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  • Applying a two-stage translational picture encoding method by a single-dimensional cosine transformation

    Publication Year: 1989, Page(s):546 - 547
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (144 KB)

    Supplementing of transformational encoding by encoding a sequence of coefficients magnitudes in a decreasing order of magnitudes results in a to-stage transformational encoding method. When the method is applied to two-dimensional pictures, the method approximates the sequence of transform coefficients magnitudes as a decreasing function which is parametrically described by very few numbers. By us... View full abstract»

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  • A pipeline processor employing hexagonal sampling for surface inspection

    Publication Year: 1989, Page(s):156 - 160
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (372 KB)

    The simulation of a pipeline image processor is presented. The pipeline is comprised of a series of common hardware processor elements, each individually programmable to provide a separate function. This architecture results in real-time system implementation at low cost, making it suitable for industrial vision applications. A comparison is made between processes operating on square and hexagonal... View full abstract»

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  • Non-linear filters for removing noise from binary images

    Publication Year: 1989, Page(s):638 - 645
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (488 KB)

    The standard strategy described is highly effective for improving detection performance in many practical problems. Some variations are superior to the binary median filter which is frequently recommended. Scope exists nevertheless for developing the approach, for example, by storing the original triggers until filtering is complete so that degraded trigger clusters may be restored and the `W' pro... View full abstract»

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  • Visual pattern discrimination using local operators generated by a learning algorithm

    Publication Year: 1989, Page(s):406 - 410
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (332 KB)

    Presents an efficient algorithm for the generation of local operators (LOs) to maximize any arbitrary figure of merit associated with one or more filtered images. This is demonstrated on 5×5 masks with constraints that define a 13-dimensional system, and examples are given in feature extraction, in visual texture segmentation and classification, and in target detection View full abstract»

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  • Programmable systolic arrays for robotic and computer vision systems

    Publication Year: 1989, Page(s):506 - 510
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (248 KB)

    Several approaches have been made to make systolic arrays more flexible, so that different problems can be handled by a single systolic array. The paper considers an alternative concept of a VLSI-suited architecture and its application to real-time robot control and high-speed vision systems: the instruction systolic array (ISA) View full abstract»

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  • Joint optimization in linear and nonlinear image restoration under the presence of different kinds of noise

    Publication Year: 1989, Page(s):646 - 650
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (368 KB)

    The image restoration problem is considered, in the presence of mixed types of noise. An approach that exploits space-varying objective functions, which result in global, locally-varying filtering schemes for the removal of mixed noise, is introduced. The analysis is performed for both the linear and the nonlinear image formation systems. The algorithm proposed results in a degradation of the deta... View full abstract»

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  • A new approach to curvature estimation and description

    Publication Year: 1989, Page(s):54 - 58
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (284 KB)

    A new method for detection and estimation of curvature is presented. The algorithm is implemented in the hierarchical feature pyramid proposed in the GOP concept. Curvature is handled at the second level of the pyramid with an orientation description of the image as input. This complex valued image is convolved and the filter responses are combined into a description of curvature direction, magnit... View full abstract»

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  • Simultaneous image segmentation and edge detection

    Publication Year: 1989, Page(s):411 - 415
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (328 KB)

    It is shown that the two tasks of region and edge segmentation can be achieved using a single, unified approach based upon the cooccurrence matrix. It is also shown that, when an image is composed of non-textured regions, then the cooccurrence matrix possesses a characteristic structure of peaks corresponding to regions and boundaries in the image. The cooccurrence matrix will be treated as a feat... View full abstract»

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  • Parallel algorithms for tomographic image reconstruction

    Publication Year: 1989, Page(s):178 - 181
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (140 KB)

    Algorithms for parallel image reconstruction are being developed to run on arrays of transputers. Both non-iterative and iterative algorithms have been investigated. Two algorithms are presented which solve the inverse problem in each of these. The first is an implementation of a widely used non-iterative algorithm and the second, a new parallel iterative algorithm View full abstract»

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  • Vector quantization based on visual masking functions for the DPCM and HDPCM coding of coloured pictures

    Publication Year: 1989, Page(s):548 - 552
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (308 KB)

    In DPCM (differential pulse code modulation) or HDPCM (hybrid DPCM) of coloured pictures consisting of three components, every component can be coded with three separate coders, each containing a scalar quantizer. However, more compression can be obtained with one vector quantizer instead of three scalar quantizers. In the article, the attention is focused on the placement of the output vectors in... View full abstract»

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  • An enhanced transputer module for real-time image processing

    Publication Year: 1989, Page(s):131 - 135
    Cited by:  Papers (1)  |  Patents (7)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (288 KB)

    This paper describes the design and development of a transputer based processing module equipped with a flexible 10 controller capable of operating at video rates. The 10 controller allows complex data structures to be moved directly into or out of the transputer's memory space with only a small impact on the performance of the transputer. Additionally, the transfers can be synchronised with the o... View full abstract»

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  • Invariance properties of the zero crossings of the Laplacian of Gaussian operator in stereo matching

    Publication Year: 1989, Page(s):23 - 27
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (260 KB)

    Given two pictures of an arbitrary scene which are taken from different viewpoints, one can determine the 3-D coordinates of an arbitrary point in the scene, if one can identify its projection in each of the stereopair pictures. This requires the solution of the so-called `correspondence problem': the matching of a piece of one of the stereo images to a piece of the other one, in order to identify... View full abstract»

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  • REPIP: a real-time front-end image processing system

    Publication Year: 1989, Page(s):511 - 515
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (280 KB)

    Describes the design and application areas of a real-time front end image processing system. The system is designed to enhance the performance of any general image processing system by providing real-time preprocessing functions. The system consists of a number of hardware processing units which perform their functions in parallel. The processing units make use of versatile memory unit (VMUs) inst... View full abstract»

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  • Pyramid vision applied to automatic inspection

    Publication Year: 1989, Page(s):59 - 62
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (268 KB)

    A processing structure that is variously called a pyramid, a quadtree, a recognition cone, or a processing cone has been proposed as a means of achieving a high degree of parallelism for tasks such as object recognition in machine vision. In its simplest form the pyramid consists of a base with pm by pn pixels, where typically p=2 or p=3. This is called a `retinal memory' View full abstract»

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  • Real-time Arabic handwritten character recognition

    Publication Year: 1989, Page(s):212 - 216
    Cited by:  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (308 KB)

    This paper considers the development of a real-time Arabic handwritten character recognition system. The shape of an Arabic character depends on its position in a given word. The system assumes that characters result from a reliable segmentation stage, thus, the position of the character is known a priori. Four different sets of character shapes have been independently considered. Each set is furt... View full abstract»

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  • Enhancement of two-dimensional holographic images by resolution improvement through hologram aperture expansion

    Publication Year: 1989, Page(s):682 - 686
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (272 KB)

    The application of the 1-D aperture expansion algorithm to 2-D holograms is demonstrated for the cases of 1-point, 2-point, and quasi-continuous objects in the presence of noise. Due to the 1-D nature of the algorithm, different predictive models used for rows and columns in the case of 2-point and similar objects; which calls for some prior knowledge of the object geometry. Quality of images from... View full abstract»

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  • A stream processing architecture for real-time implementation of perspective spatial transformations

    Publication Year: 1989, Page(s):482 - 486
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (256 KB)

    A system is presented to perform perspective spatial transformations at video-rate using a mapping function which can vary at frame rate. The mapping is implemented by two successive applications of a one-dimensional algorithm operating in scan-line order using a framestore to store an intermediate image. A novel one-dimensional filtering algorithm provides a continuous mapping from source to dest... View full abstract»

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  • Region and texture coding of TV pictures

    Publication Year: 1989, Page(s):536 - 540
    Cited by:  Patents (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (316 KB)

    A description of a region and texture picture coding system is presented. It attempts to gain high compression ratios and a good image quality by analysing the picture into separate regional and textural components that are encoded separately. The paper briefly describes the process of decomposing the picture and how the separate components can be coded. It concentrates on the processing used to s... View full abstract»

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  • Sampling pattern conversion with 2-D FIR filters

    Publication Year: 1989, Page(s):275 - 279
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (252 KB)

    The problem of conversion between different periodic sampling structures is of importance in a number of applications related to multidimensional signal processing. For instance in areas of image processing, as multiresolution representations or high definition television, one has to modify sampling structures. For these types of processing finite impulse response (FIR) digital filters offer two m... View full abstract»

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  • Methods of gradient vector compensated image processing

    Publication Year: 1989, Page(s):264 - 269
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (352 KB)

    Outlines investigations into techniques for creating accurate gradient vectors used as pointers for an intra-field interpolation of 2:1 interlaced scanning systems. The emphasis of this paper is placed on the techniques used for gradient vector estimation View full abstract»

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