Demosaicked image postprocessing using local color ratios

Author

Lukac, Rastislav ; Martin, Karl ; Plataniotis, Konstantinos N.

Author_Institution

Edward S. Rogers Sr. Dept. of Electr. & Comput. Eng., Univ. of Toronto, Ont., Canada

Volume

14

Issue

6

fYear

2004

fDate

6/1/2004 12:00:00 AM

Firstpage

914

Lastpage

920

Abstract

A postprocessing method for the correction of visual demosaicking artifacts is introduced. The restored, full-color images previously obtained by cost-effective color filter array interpolators are processed to improve their visual quality. Based on a localized color ratio model and the original underlying Bayer pattern structure, the proposed solution impressively removes false colors while maintaining image sharpness. At the same time, it yields excellent improvements in terms of objective image quality measures.

Keywords

image colour analysis; image restoration; Bayer pattern structure; color filter array interpolator; demosaicked image postprocessing; full-color image; image quality; image sharpness; local color ratio; restored image; visual demosaicking artifact; visual quality; Color; Filters; Humans; Image quality; Image restoration; Interpolation; Personal digital assistants; Pixel; Sensor arrays; Time measurement; Bayer pattern; CFA; color artifact removing; color filter array; demosaicked image postprocessing; human visual system; interpolation; subjective evaluation;

fLanguage

English

Journal_Title

Circuits and Systems for Video Technology, IEEE Transactions on

Publisher

ieee

ISSN

1051-8215

Type

jour

DOI

10.1109/TCSVT.2004.828316

Filename

1302174