IEEE Transactions on Pattern Analysis and Machine Intelligence

Issue 5 • May 1995

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Displaying Results 1 - 11 of 11
  • Deformable kernels for early vision

    Publication Year: 1995, Page(s):488 - 499
    Cited by:  Papers (133)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1424 KB)

    Early vision algorithms often have a first stage of linear-filtering that `extracts' from the image information at multiple scales of resolution and multiple orientations. A common difficulty in the design and implementation of such schemes is that one feels compelled to discretize coarsely the space of scales and orientations in order to reduce computation and storage costs. A technique is presen... View full abstract»

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  • Probabilistic indexing for object recognition

    Publication Year: 1995, Page(s):518 - 522
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (524 KB)

    Recent papers have indicated that indexing is a promising approach to fast model-based object recognition because it allows most of the possible matches between sets of image features and sets of model features to be quickly eliminated from consideration. This correspondence describes a system that is capable of indexing using sets of three points undergoing 3D transformations and projection by ta... View full abstract»

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  • A new efficient and direct solution for pose estimation using quadrangular targets: algorithm and evaluation

    Publication Year: 1995, Page(s):534 - 538
    Cited by:  Papers (66)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    Pose estimation is an important operation for many vision tasks. In this paper, the authors propose an algorithm for pose estimation based on the volume measurement of tetrahedra composed of feature-point triplets extracted from an arbitrary quadrangular target and the lens center of the vision system. The inputs to this algorithm are the six distances joining all feature pairs and the image coord... View full abstract»

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  • Reciprocal-wedge transform for space-variant sensing

    Publication Year: 1995, Page(s):500 - 511
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1008 KB)

    The reciprocal-wedge transform (RWT) is presented as an alternative to the log-polar transform which has been a popular model for space-variant sensing in computer vision. The RWT facilitates an anisotropic variable resolution. Unlike the log-polar, its variable resolution is predominantly in one dimension. Consequently, the RWT preserves linearity of lines and translations in the original image. ... View full abstract»

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  • Color constant color indexing

    Publication Year: 1995, Page(s):522 - 529
    Cited by:  Papers (277)  |  Patents (41)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (812 KB)

    Objects can be recognized on the basis of their color alone by color indexing, a technique developed by Swain-Ballard (1991) which involves matching color-space histograms. Color indexing fails, however, when the incident illumination varies either spatially or spectrally. Although this limitation might be overcome by preprocessing with a color constancy algorithm, we instead propose histogramming... View full abstract»

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  • Silhouette-based isolated object recognition through curvature scale space

    Publication Year: 1995, Page(s):539 - 544
    Cited by:  Papers (95)  |  Patents (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (580 KB)

    A complete, fast and practical isolated object recognition system has been developed which is very robust with respect to scale, position and orientation changes of the objects as well as noise and local deformations of shape (due to perspective projection, segmentation errors and non-rigid material used in some objects). The system has been tested on a wide variety of three-dimensional objects wi... View full abstract»

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  • The application of semantic classification trees to natural language understanding

    Publication Year: 1995, Page(s):449 - 460
    Cited by:  Papers (40)  |  Patents (31)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1060 KB)

    This article describes a new method for building a natural language understanding (NLU) system, in which the system's rules are learnt automatically from training data. The method has been applied to design of a speech understanding (SU) system. Designers of such systems rely increasingly on robust matchers to perform the task of extracting meaning from one or several word sequence hypotheses gene... View full abstract»

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  • Cooperative robust estimation using layers of support

    Publication Year: 1995, Page(s):474 - 487
    Cited by:  Papers (65)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1340 KB)

    We present an approach to the problem of representing images that contain multiple objects or surfaces. Rather than using an edge-based approach to represent the segmentation of a scene, we propose a multilayer estimation framework which uses support maps to represent the segmentation of the image into homogeneous chunks. This support-based approach can represent objects that are split into disjoi... View full abstract»

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  • Linear and incremental acquisition of invariant shape models from image sequences

    Publication Year: 1995, Page(s):512 - 517
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (576 KB)

    We show how to automatically acquire Euclidian shape representations of objects from noisy image sequences under weak perspective. The proposed method is linear and incremental, requiring no more than pseudoinverse. A nonlinear, but numerically sound preprocessing stage is added to improve the accuracy of the results even further. Experiments show that attention to noise and computational techniqu... View full abstract»

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  • Linear time Euclidean distance transform algorithms

    Publication Year: 1995, Page(s):529 - 533
    Cited by:  Papers (223)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (544 KB)

    Two linear time (and hence asymptotically optimal) algorithms for computing the Euclidean distance transform of a two-dimensional binary image are presented. The algorithms are based on the construction and regular sampling of the Voronoi diagram whose sites consist of the unit (feature) pixels in the image. The first algorithm, which is of primarily theoretical interest, constructs the complete V... View full abstract»

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  • Combining image compression and classification using vector quantization

    Publication Year: 1995, Page(s):461 - 473
    Cited by:  Papers (71)  |  Patents (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1260 KB)

    We describe a method of combining classification and compression into a single vector quantizer by incorporating a Bayes risk term into the distortion measure used in the quantizer design algorithm. Once trained, the quantizer can operate to minimize the Bayes risk weighted distortion measure if there is a model providing the required posterior probabilities, or it can operate in a suboptimal fash... View full abstract»

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Aims & Scope

The IEEE Transactions on Pattern Analysis and Machine Intelligence (TPAMI) is published monthly. Its editorial board strives to present most important research results in areas within TPAMI's scope.

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Meet Our Editors

Editor-in-Chief
Sven Dickinson
University of Toronto
e-mail: sven@cs.toronto.edu