hig.sePublications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard-cite-them-right
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • sv-SE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • de-DE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Pre-Processing of Underwater Images Taken in Shallow Waters for Color Reconstruction Purposes
University of Gävle, Department of Mathematics, Natural and Computer Sciences, Ämnesavdelningen för datavetenskap.
University of Gävle, Department of Mathematics, Natural and Computer Sciences, Ämnesavdelningen för matematik och statistik. (matematik)
2005 (English)In: Proceedings of the 7th IASTED International Conference on Signal and Image Processing, 2005Conference paper, Published paper (Refereed)
Abstract [en]

Coral reefs are monitored with different techniques in order to examine their health. Digital cameras, which provide an economically defendable tool for marine scientists to collect underwater data, tend to produce bluish images due to severe absorption of light at longer wavelengths. In this paper we study the possibilities of correcting for this color distortion through image processing. The decrease of red light by depth can be predicted by Beer's law. Another parameter that has to be taken into account is the image enhancement functions built into the camera. We use a spectrometer and a reflectance standard to obtain the data needed to approximate the joint effect of these functions. This model is used to pre-process the underwater images taken by digital cameras so that the red, green and blue channels show correct values before the images are subjected to correction for the effects of water column through application of Beer's law. This process is fully automatic and the amount of processed images is limited only by the speed of computer system. Experimental results show that the proposed method works well for correcting images taken at different depths with two different cameras.

Place, publisher, year, edition, pages
2005.
Keywords [en]
image, underwater, pre-processing, color, correction, light
National Category
Computer Vision and Robotics (Autonomous Systems) Computer Sciences
Identifiers
URN: urn:nbn:se:hig:diva-2452OAI: oai:DiVA.org:hig-2452DiVA, id: diva2:119114
Conference
The 7th IASTED International Conference on Signal and Image Processing, Honolulu, Hawaii, USA, August 15-17, 2005
Note
On CD-ROM.Available from: 2008-03-26 Created: 2008-03-26 Last updated: 2018-03-13Bibliographically approved

Open Access in DiVA

No full text in DiVA

Authority records BETA

Åhlén, JuliaSundgren, David

Search in DiVA

By author/editor
Åhlén, JuliaSundgren, David
By organisation
Ämnesavdelningen för datavetenskapÄmnesavdelningen för matematik och statistik
Computer Vision and Robotics (Autonomous Systems)Computer Sciences

Search outside of DiVA

GoogleGoogle Scholar

urn-nbn

Altmetric score

urn-nbn
Total: 349 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard-cite-them-right
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • sv-SE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • de-DE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf