Estimation of Projector Defocus Blur by Extracting Texture Rich Region in Projection Image
Date issued
2008
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Václav Skala - UNION Agency
Abstract
To use a projector anytime anywhere, a lot of projector-camera based approaches have been proposed. Focal
correction technique, one of them, reduces the effect of defocus blur which occurs when a screen is located out of
projector's depth-of-field. To achieve focal correction, we have to estimate the degree of defocus blur on the
displayed images. Some previous methods use any special pattern images. A method which needs no special
image has been proposed, however, this method can't estimate at less-textured or already blurred region in the
projection image. In this paper, we propose a novel method for estimating PSF (Point Spread Function) without
projecting any special pattern images. To prevent such an estimation error, we search and extract well-suited
regions to estimate PSF in the projection image and estimate the PSF at extracted region. Experimental results
show that our method can prevent PSF estimation error without any special images.
Description
Subject(s)
projektor-kamerový systém, rozostření projektoru, prokorekce, vylepšení obrazu
Citation
WSCG '2008: Communication Papers: The 16-th International Conference in Central Europe on Computer Graphics, Visualization and Computer Vision in co-operation with EUROGRAPHICS: University of West Bohemia, Plzen, Czech Republic, February 4 - 7, 2008, p. 153-160.