Defocus blur correcting projector-camera system

Yuji Oyamada, Hideo Saito

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

11 Citations (Scopus)


To use a projector anytime anywhere, a lot of projector-camera based approaches have been proposed. In this paper, we focus on a focal correction technique, one of projector-camera based approaches, reduces an effect of defocus blur which occurs when a screen is located out of projector's depth-of-field. We propose a novel method for estimating projector defocus blur on a planar screen without any special measuring images. To estimate a degree of defocus blur accurate, we extract sub-region which is well-suited for defocus blur estimation in a projection image and estimate the degree of defocus blur at each extracted region. To remove the degradation caused by the defocus blur, we pre-correct the projection image depends on the degree of defocus blur before projection. Experimental results show that our method can estimate the degree of defocus blur without projecting any special images and pre-corrected image can reduce the effect of the defocus blur.

Original languageEnglish
Title of host publicationAdvanced Concepts for Intelligent Vision Systems - 10th International Conference, ACIVS 2008, Proceedings
PublisherSpringer Verlag
Number of pages12
ISBN (Print)3540884572, 9783540884576
Publication statusPublished - 2008
Event10th International Conference on Advanced Concepts for Intelligent Vision Systems, ACIVS 2008 - Juan-les-Pins, France
Duration: 2008 Oct 202008 Oct 24

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume5259 LNCS
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349


Other10th International Conference on Advanced Concepts for Intelligent Vision Systems, ACIVS 2008


  • Defocus blur
  • Focal correction
  • Projector-camera system

ASJC Scopus subject areas

  • Theoretical Computer Science
  • General Computer Science


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