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Landsat image enhancement techniques for subtidal and intertidal seagrass detection and distribution mapping in the coastal waters of Sungai Pulai estuary, Malaysia
https://doi.org/10.15083/00040618
https://doi.org/10.15083/0004061860ec0fc8-5dd3-4ef3-b3bb-d4cbff80cd6a
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
CMS380105.pdf (2.4 MB)
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| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2015-08-11 | |||||
| タイトル | ||||||
| タイトル | Landsat image enhancement techniques for subtidal and intertidal seagrass detection and distribution mapping in the coastal waters of Sungai Pulai estuary, Malaysia | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Image enhancement technique | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | histogram equalization | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | manual enhancement | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Landsat | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | seagrass | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Malaysia | |||||
| 資源タイプ | ||||||
| 資源 | http://purl.org/coar/resource_type/c_6501 | |||||
| タイプ | departmental bulletin paper | |||||
| ID登録 | ||||||
| ID登録 | 10.15083/00040618 | |||||
| ID登録タイプ | JaLC | |||||
| 著者 |
Hossain, M. S.
× Hossain, M. S.× Sidik, B. Japar× Harah, Z. Muta |
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| 著者所属 | ||||||
| 著者所属 | Department of Animal Science and Fishery, Faculty of Agriculture and Food Sciences, Universiti Putra Malaysia Bintulu Sarawak Campus | |||||
| 著者所属 | ||||||
| 著者所属 | Department of Biology, Faculty of Science, Universiti Putra Malaysia | |||||
| 著者所属 | ||||||
| 著者所属 | Department of Aquaculture, Faculty of Agriculture, Universiti Putra Malaysia | |||||
| 著者所属 | ||||||
| 著者所属 | Institute of Bioscience, Universiti Putra Malaysia | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | In Malaysia, seagrasses commonly inhabit shallow intertidal waters, semi enclosed lagoons, mangroves, coral reef flats and shoals in subtidal zones. Seagrass meadows have widely been surveyed by field sampling methods. As an alternative means to field-based surveys, airborne and/or satellite based sensors have been used to produce cost-effective and, more importantly, repetitive sources of information on seagrass distribution over wider areas. The satellite-based sensors Landsat imagery have been used as relatively economic alternatives to aerial photographs to produce seagrass cover maps and change analysis. Two radiometric image enhancement techniques (ETs)?histogram equalization (HE) and manual enhancement (ME) were applied on the series of Landsat images for comparative analysis and assessing ability of ETs to recognize seagrass meadows within the subtidal and intertidal coastal waters of the Sungai Pulai estuary, Johor Straits, Malaysia. With a view to find relations between Mean Sea Level Tide Heights (MSLTHs) and results of ETs, actual 33 multi-date (1989?2014) images with a wide range of MSLTH regimes (-0.281 to 0.234 m) during image acquisition time, were processed by applying ETs. The ME substantially improved image quality compared to the HE, enabled detection of Seluyong seagrass meadows in intertidal mudflat, Merambong, Tanjung Adang Darat, Tanjung Adang Laut shoals in the subtidal areas. Seagrass meadows were 'eeasy-to-recognize'without noticeable variations due to MSLTH differences from the enhanced images acquired during extreme lowest spring tide height, -0.218 m and above until MSLTH at -0.085 m; found 'difficult-to-recognize'at full extent between ?0.067 to -0.003 m and 'not-recognizable'above MSLTH. ETs would be ineffective if applied to images acquired higher than MSLTH (0.007 to 0.234 m). The proposed ET is found to provide a consistent and quantitative areal cover for seagrass mapping and understand past changes from multi-date image analyses. | |||||
| 書誌情報 |
Coastal marine science 巻 38, 号 1, p. 27-41, 発行日 2015-07 |
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| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 13493000 | |||||
| 書誌レコードID | ||||||
| 収録物識別子タイプ | NCID | |||||
| 収録物識別子 | AA11957899 | |||||
| 出版者 | ||||||
| 出版者 | International Coastal Research Center, Atmosphere and Ocean Research Institute, the University of Tokyo | |||||
| 出版者別名 | ||||||
| 東京大学大気海洋研究所国際沿岸海洋研究センター | ||||||
