IEEE Transactions on Pattern Analysis and Machine Intelligence

Issue 7 • Jul 1991

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Displaying Results 1 - 8 of 8
  • Dynamic 3D models with local and global deformations: deformable superquadrics

    Publication Year: 1991, Page(s):703 - 714
    Cited by:  Papers (387)  |  Patents (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1004 KB)

    The authors present a physically based approach to fitting complex three-dimensional shapes using a novel class of dynamic models that can deform both locally and globally. They formulate the deformable superquadrics which incorporate the global shape parameters of a conventional superellipsoid with the local degrees of freedom of a spline. The model's six global deformational degrees of freedom c... View full abstract»

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  • Estimation of illuminant direction, albedo, and shape from shading

    Publication Year: 1991, Page(s):680 - 702
    Cited by:  Papers (242)  |  Patents (28)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2468 KB)

    A robust approach to the recovery of shape from shading information is presented. Assuming uniform albedo and Lambertian surface for the imaging model, two methods for estimating the azimuth of the illuminant are presented. One is based on local estimates on smooth patches, and the other method uses shading information along image contours. The elevation of the illuminant and surface albedo are es... View full abstract»

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  • Reflections on shading

    Publication Year: 1991, Page(s):671 - 679
    Cited by:  Papers (35)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (736 KB)

    It is demonstrated that mutual illumination can produce significant effects in real scenes. An example is presented to illustrate the difficulties that mutual illumination presents to shape recovery schemes. These effects are qualitatively modeled by the radiosity equation. Using the radiosity equation, the authors predict the occurrence of spectral events in the radiance, namely, discontinuities ... View full abstract»

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  • Surface identification using the dichromatic reflection model

    Publication Year: 1991, Page(s):658 - 670
    Cited by:  Papers (65)  |  Patents (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1104 KB)

    The author describes a method based on the dichromatic reflection model for identifying object surfaces. The surface spectral reflectance function of an inhomogeneous object is described as the sum of a constant interface (specular) reflectance and a body (diffuse) reflectance under all illumination geometries. The interface component is used to estimate the spectral power distribution of the illu... View full abstract»

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  • Closed-form solutions for physically based shape modeling and recognition

    Publication Year: 1991, Page(s):715 - 729
    Cited by:  Papers (261)  |  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1596 KB)

    The authors present a closed-form, physically based solution for recovering a three-dimensional (3-D) solid model from collections of 3-D surface measurements. Given a sufficient number of independent measurements, the solution is overconstrained and unique except for rotational symmetries. The proposed approach is based on the finite element method (FEM) and parametric solid modeling using implic... View full abstract»

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  • Surface reflection: physical and geometrical perspectives

    Publication Year: 1991, Page(s):611 - 634
    Cited by:  Papers (324)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1884 KB)

    Reflectance models based on physical optics and geometrical optics are studied. Specifically, the authors consider the Beckmann-Spizzichino (physical optics) model and the Torrance-Sparrow (geometrical optics) model. These two models were chosen because they have been reported to fit experimental data well. Each model is described in detail, and the conditions that determine the validity of the mo... View full abstract»

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  • Recovery of nonrigid motion and structure

    Publication Year: 1991, Page(s):730 - 742
    Cited by:  Papers (218)  |  Patents (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1448 KB)

    The authors introduce a physically correct model of elastic nonrigid motion. This model is based on the finite element method, but decouples the degrees of freedom by breaking down object motion into rigid and nonrigid vibration or deformation modes. The result is an accurate representation for both rigid and nonrigid motion that has greatly reduced dimensionality, capturing the intuition that non... View full abstract»

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  • Constraining object features using a polarization reflectance model

    Publication Year: 1991, Page(s):635 - 657
    Cited by:  Papers (144)  |  Patents (25)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2116 KB)

    The authors present a polarization reflectance model that uses the Fresnel reflection coefficients. This reflectance model accurately predicts the magnitudes of polarization components of reflected light, and all the polarization-based methods presented follow from this model. The authors demonstrate the capability of polarization-based methods to segment material surfaces according to varying lev... 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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Editor-in-Chief
Sven Dickinson
University of Toronto
e-mail: sven@cs.toronto.edu