2001
DOI: 10.1117/12.411677
|View full text |Cite
|
Sign up to set email alerts
|

<title>Monitoring of coral reefs on Ishigaki Island in Japan using multitemporal remote sensing data</title>

Abstract: In recent years environmental problems in the coral reefs attract both scientific and social attentions. However, most coral reefs have few maps showing the reef topography and the distributions of various benthic habitats in the reef. Satellite remote sensing can be used for coral reef mapping because satellites can observe the reefs scattered in tropical oceans in a short time repeatedly. Simple comparison between satellite images acquired on two different days is, however, strongly affected by the changes o… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
2
1

Citation Types

0
7
0

Year Published

2004
2004
2022
2022

Publication Types

Select...
7
1

Relationship

0
8

Authors

Journals

citations
Cited by 11 publications
(7 citation statements)
references
References 0 publications
0
7
0
Order By: Relevance
“…This included applying a water mask, cloud/fill pixel mask, and sun glint correction. The dark-pixel subtraction method was applied to correct for atmospheric contributions [77][78][79]. Finally, the preprocessing steps concluded with a calculation of the per pixel DII for water column correction.…”
Section: Methodsmentioning
confidence: 99%
“…This included applying a water mask, cloud/fill pixel mask, and sun glint correction. The dark-pixel subtraction method was applied to correct for atmospheric contributions [77][78][79]. Finally, the preprocessing steps concluded with a calculation of the per pixel DII for water column correction.…”
Section: Methodsmentioning
confidence: 99%
“…The water body and corals have similar spectral reflectance, which may lead to misclassification in water/coral areas. A deep-water area of interest (AOI) was selected to be used in atmospheric correction via the dark-pixel subtraction method [30,59,60]. An LDA application was then implemented and trained on the Palmyra Atoll site data.…”
Section: Methodsmentioning
confidence: 99%
“…However, it is noteworthy that there are many more satellites available that can provide remote sensing data for coral reef analysis [26][27][28]. The 400 nm-600 nm wavelength spectral radiance is known to be useful in the mapping of ocean habitats including coral [29][30][31]. This visible light portion of the spectrum can penetrate~15 to 30 m through clear waters, depending on turbidity and water quality [32].…”
Section: Introductionmentioning
confidence: 99%
“…Prior to image classification, pretreatment for depth was performed on the RGB color images (Table 2). Watercolumn effects were corrected using the Lyzenga approach to work with benthic albedo as opposed to water-column reflectance + benthic albedo signals (Lyzenga 1978, 1981, Matsunaga et al 2000. For more than 20 polygons that were distributed across the whole area and contained sufficient numbers and combinations of pixel colors to create a regression model, RGB-band values for the sandy areas were extracted.…”
Section: Pretreatment Of Depth For Semi-automatic Classificationmentioning
confidence: 99%