Spectro-Spatial Gradients for Color-Based Object Recognition and Indexing

  • Daniel Berwick
  • Sang Wook Lee
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 1689)


This paper presents illumination pose- and illumination colorinvariant color feature descriptors for object recognition and indexing which are derived from spectral (color) and spatial derivatives of logarithmic image irradiance. While the use of spatial gradients and spatial ratios of image irradiance have been suggested for limited viewing-pose invariance and illumination-color invariance, respectively, gradients in the spectral direction and combination of spectral and spatial gradients have not been fully investigated. We present a unified framework for analyzing spatial and spectral gradients of logarithmic image irradiance, and suggest that spectro-spatial gradients have rich potential for developing local and global descriptors of object color. Experimental results are presented to demonstrate the efficacy of the proposed descriptors.


Feature Vector Object Recognition Database Image Spatial Gradient Illumination Condition 
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Copyright information

© Springer-Verlag Berlin Heidelberg 1999

Authors and Affiliations

  • Daniel Berwick
    • 1
  • Sang Wook Lee
    • 1
  1. 1.University of MichiganAnn ArborUSA

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