Image Enhancement Prior to Color Filter Array Demosaicking

Damian Tohl, Jim Li, Sharmil Randhawa, Nathan Pickering

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review


For color images captured by single-image sensors, enhancement is usually performed after Color Filter Array (CFA) demosaicking due to the fact that most image enhancement algorithms are developed for full color images. As enhancement prior to demosaicking will produce a different result from enhancement after demosaicking, it will be more desirable to enhance an image prior to demosaicking particularly for images with a narrow intensity range. One reason is that demosaicking is the interpolation of missing colors, and interpolation within a narrow intensity range with only a few discrete intensity levels may lead to large interpolation errors. On the other hand, if enhancement is performed prior to demosaicking to widen the range of intensity, the above-mentioned interpolation errors could be reduced. In this paper, we proposed an image enhancement algorithm particularly for CFA images prior to demosaicking. It has been shown that enhancement prior to demosaicking could produce more visually pleasing images than those performed after demosaicking.

Original languageEnglish
Title of host publicationProceedings of TENCON 2018 - 2018 IEEE Region 10 Conference
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages5
ISBN (Electronic)9781538654576
Publication statusPublished - 24 Feb 2019
Event2018 IEEE Region 10 Conference, TENCON 2018 - Jeju, Korea, Republic of
Duration: 28 Oct 201831 Oct 2018

Publication series

NameIEEE Region 10 Annual International Conference, Proceedings/TENCON
ISSN (Print)2159-3442
ISSN (Electronic)2159-3450


Conference2018 IEEE Region 10 Conference, TENCON 2018
Country/TerritoryKorea, Republic of


  • color images
  • single-image sensors
  • Color Filter Array
  • demosaicking


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