TY - GEN
T1 - Estimation of projector defocus blur by extracting texture rich region in projection image
AU - Oyamada, Yuji
AU - Saito, Hideo
PY - 2008/12/1
Y1 - 2008/12/1
N2 - 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.
AB - 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.
KW - Defocus blur estimation
KW - Image enhancement
KW - Pre-correction
KW - Projector defocus
KW - Projector-camera system
UR - http://www.scopus.com/inward/record.url?scp=57049158720&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=57049158720&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:57049158720
SN - 9788086943152
T3 - 16th International Conference in Central Europe on Computer Graphics, Visualization and Computer Vision, WSCG'2008 - In Co-operation with EUROGRAPHICS, Full Papers
SP - 153
EP - 160
BT - 16th International Conference in Central Europe on Computer Graphics, Visualization and Computer Vision, WSCG'2008 - In Co-operation with EUROGRAPHICS, Full Papers
T2 - 16th International Conference in Central Europe on Computer Graphics, Visualization and Computer Vision 2008, WSCG'2008
Y2 - 4 February 2008 through 7 February 2008
ER -