Single underwater image restoration using attenuation-curve prior

Yi Wang, Hui Liu, Lap Pui Chau

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

9 Citations (Scopus)


Underwater images suffer from low contrast and color distortion due to the existence of dust-like particles and light attenuation. Some previous works using the patch-based priors, e.g. adaptations of the dark channel prior, cannot achieve satisfactory results in both contrast enhancement and color restoration in the underwater environment. In this paper, we propose a novel underwater image restoration method based on a non-local prior, termed an attenuation-curve prior. This prior relies on the observation that colors of a clear image can be well approximated by several hundred distinct color clusters and the pixels in the same color cluster will form a power function curved line in RGB space after their colors are attenuated by water. Our work mainly contains two steps. Firstly, we estimate the waterlight based on its smoothness properties and the different attenuation coefficient of light. Secondly, we estimate the transmission map using the attenuation-curve prior. Once the waterlight and transmission are obtained, the clear underwater image can be restored. Experimental results demonstrate that our proposed method can achieve better results when comparing with state-of-the-art approaches.

Original languageEnglish
Title of host publicationIEEE International Symposium on Circuits and Systems
Subtitle of host publicationFrom Dreams to Innovation, ISCAS 2017 - Conference Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781467368520
Publication statusPublished - 25 Sep 2017
Externally publishedYes
Event50th IEEE International Symposium on Circuits and Systems, ISCAS 2017 - Baltimore, United States
Duration: 28 May 201731 May 2017

Publication series

NameProceedings - IEEE International Symposium on Circuits and Systems
ISSN (Print)0271-4310


Conference50th IEEE International Symposium on Circuits and Systems, ISCAS 2017
Country/TerritoryUnited States

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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