Image blurring effects due to depth discontinuitites: Blurring that creates emergent image details

Thang C. Nguyen, Thomas S. Huang

Research output: Chapter in Book/Report/Conference proceedingConference contribution


A new model (called multi-component blurring or MCB) to account for image blurring effects due to depth discontinuities is presented. We show that blurring processes operating in the vicinity of large depth discontinuities can give rise to emergent image details, quite distinguishable but nevertheless un-explained by previously available blurring models. In other words, the maximum principle for scale space [Per90] does not hold. It is argued that blurring in high-relief 3-D scenes should be more accurately modeled as a multi-component process. We present results form extensive and carefully designed experiments, with many images of real scenes taken by a CCD camera with typical parameters. These results have consistently support our new blurring model. Due care was taken to ensure that the image phenomena observed are mainly due to de-focussing and not due to mutual illuminations [For89], specularity [Hea87], objects’ “finer” structures, coherent diffraction, or incidental image noises. [Gla88] We also hypothesize on the role of blurring on human depth-from-blur perception, based on correlation with recent results from human blur perception. [Hes89].

Original languageEnglish (US)
Title of host publicationComputer Vision - ECCV 1992 - 2nd European Conference on Computer Vision, Proceedings
EditorsGiulio Sandini
Number of pages16
ISBN (Print)9783540554264
StatePublished - 1992
Event2nd European Conference on Computer Vision, ECCV 1992 - Santa Margherita Ligure, Italy
Duration: May 19 1992May 22 1992

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume588 LNCS
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349


Other2nd European Conference on Computer Vision, ECCV 1992
CitySanta Margherita Ligure


  • Active vision
  • Depth-from-blur
  • Human blur perception
  • Incoherent imaging of 3-D scenes
  • Multi-component image blurring (MCB)
  • Point-spread functions (kernels)

ASJC Scopus subject areas

  • Theoretical Computer Science
  • General Computer Science


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