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Automated change detection of bleached coral reef areas
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Centrum för bildanalys. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Datoriserad bildanalys.
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Centrum för bildanalys. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Datoriserad bildanalys.
2002 (engelsk)Inngår i: Proceedings of 7th International Conference, Remote Sensing for Marine and Coastal Environments, 2002Konferansepaper, Publicerat paper (Annet vitenskapelig)
Abstract [en]

Recent dramatic bleaching events on coral reefs have enhanced the need for global environmental monitoring. This paper investigates the value of present high spatial resolution satellites to detect coral bleaching using a change detection technique. We compared an IRS LISS-III image taken during the 1998 bleaching event in Belize to images taken before the bleaching event. The sensitivity of the sensors was investigated and a simulation was made to estimate the effect of sub-pixel changes. A manual interpretation of coral bleaching, based on differences between the images, was performed and the outcome were compared to field observations. The spectral characteristics of the pixels corresponding to the field observations and the manually interpreted bleachings have been analysed and compared to pixels from unaffected areas.

sted, utgiver, år, opplag, sider
2002.
HSV kategori
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URN: urn:nbn:se:uu:diva-42500OAI: oai:DiVA.org:uu-42500DiVA, id: diva2:70402
Konferanse
7th International Conference, Remote Sensing for Marine and Coastal Environments
Tilgjengelig fra: 2005-08-25 Laget: 2005-08-25 Sist oppdatert: 2018-01-11

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