Gradient detection in discrete log-polar images

A. M. Wallace, D. J. McLaren

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


In a continuous sense, images and gradient operators can be mapped conformally between Cartesian and log-polar (LP) space and the process of gradient detection can be shown to be equivalent. However, gains in the efficiency of processing LP and other retino-cortical image mappings rely on variable sampling with a high resolution fovea and much lower resolution towards the periphery. In this paper, we consider the implementation and evaluation of three strategies for gradient detection in a space-variant, sampled LP geometry. © 2003 Published by Elsevier B.V.

Original languageEnglish
Pages (from-to)2463-2470
Number of pages8
JournalPattern Recognition Letters
Issue number14
Publication statusPublished - Oct 2003


  • Gradient detection
  • Log-polar images


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