Title :
Optical correction of scene fractions for estimating regional scale ocean coral abundance in Fiji
Author :
Peddle, Derek R. ; LeDrew, Ellsworth F. ; Holden, Heather M.
Author_Institution :
Dept. of Geogr., Waterloo Univ., Ont., Canada
Abstract :
Spectral mixture analysis is used to separate coral and water components at sub-pixel scales for a regional scale transect of SPOT imagery across Savusavu Bay, Fiji. Coral fractions on the ocean floor are estimated using empirical optical corrections from mixture fractions obtained from in situ reflectance profile measurements and with reference to a digitised bathymetric chart. Additional corrections are applied to estimate live coral abundance by removing the signal component contributed by coral debris. Issues involved in regional scale applications are discussed in the context of future airborne and satellite image applications
Keywords :
aquaculture; geophysical techniques; oceanographic regions; oceanographic techniques; oceanography; remote sensing; seafloor phenomena; Fiji; Pacific island; SPOT imagery; Savusavu Bay; bathymetry; coral reef; live coral; marine animal; marine biology; measurement technique; ocean; optical correction; optical imaging; regional scale coral abundance; satellite remote sensing; scene fractions; sea coast; seafloor geology; spectral mixture analysis; subpixel scale; tropical ocean; Image analysis; Layout; Oceanographic techniques; Oceans; Optical attenuators; Optical filters; Optical sensors; Reflectivity; Sea measurements; Spectral analysis;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 1996. IGARSS '96. 'Remote Sensing for a Sustainable Future.', International
Conference_Location :
Lincoln, NE
Print_ISBN :
0-7803-3068-4
DOI :
10.1109/IGARSS.1996.516362
