NDLI: Blind reverse CFA demosaicking for the reduction of colour artifacts from demosaicked images

Content Provider	IEEE Xplore Digital Library
Author	Li, J.S.J. Randhawa, S.
Copyright Year	2010
Description	Author affiliation: Flinders University, GPO Box 2100, Adelaide, SA 5001, Australia (Li, J.S.J.; Randhawa, S.)
Abstract	When a single image sensor is used to capture a colour image, only one colour at each pixel location is acquired. Demosaicking is required to estimate the other missing colour information in order to produce a full colour image. Digital images taken by early generation digital cameras using primitive demosaicking algorithms have resulted in inferior quality images with colour artifacts. In general, it is difficult to apply filtering for the removal of those artifacts. There has been active research in the development of demosaicking algorithms for digital cameras resulting in higher quality demosaicked images with minimal colour artifacts. If those inferior quality images could be re-demosaicked by making use of the advance in demosaicking algorithms, a better output image can be produced without filtering. In this paper, we proposed a novel technique to firstly extract the true sensor pixel values using blind reverse demosaicking from the inferior colour image input. We then apply a state-of-the-art demosaicking method to reproduce the output image with minimal colour artifacts. One advantage of our proposed blind reverse demosaicking method is that an image not in RAW format (digital negative) can still be improved in quality with the advancement of demosaicking algorithms.
Starting Page	1
Ending Page	8
File Size	1346374
Page Count	8
File Format	PDF
ISBN	9781424496297
ISSN	21512205
e-ISBN	9781424496310
DOI	10.1109/IVCNZ.2010.6148797
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-11-08
Publisher Place	New Zealand
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Image color analysis Digital images Green products Transform coding Bayer Digital cameras blind reverse CFA demosaicking Discrete cosine transforms Data mining colour artifacts 2D-DCT
Content Type	Text
Resource Type	Article

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