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General intensity transformations and differential invariants

  • L. M. J. Florack
  • B. M. Ter Haar Romeny
  • J. J. Koenderink
  • M. A. Viergever
Article

Abstract

We consider the group of invertible image gray-value transformations and propose a generating equation for a complete set of differential gray-value invariants up to any order. Such invariants describe the image's geometrical structure independent of how its gray-values are mapped (contrast or brightness adjustments).

Key words

local gray-value invariants Cartesian tensors local isophote structure 

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Copyright information

© Kluwer Academic Publishers 1994

Authors and Affiliations

  • L. M. J. Florack
    • 1
  • B. M. Ter Haar Romeny
    • 1
  • J. J. Koenderink
    • 1
  • M. A. Viergever
    • 1
  1. 1.3D Computer Vision Research GroupUtrecht University HospitalUtrechtThe Netherlands

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