AUTOMATIC WATER SURFACE EXTRACTION ALGORITHM FOR LANDSAT7-ETM+ SATELLITE IMAGE OVER COASTAL AND INLAND WATERS

  • Dinh Ngoc Dat Institute of Space Technology, Vietnam Academy of Science and Technology, Cau Giay, Hanoi
  • Pham Van Bach Ngoc Institute of Space Technology, Vietnam Academy of Science and Technology, Cau Giay, Hanoi
  • Huynh Xuan Quang Institute of Space Technology, Vietnam Academy of Science and Technology, Cau Giay, Hanoi
  • Mai Thi Hong Nguyen Institute of Space Technology, Vietnam Academy of Science and Technology, Cau Giay, Hanoi
  • Doan Minh Chung Institute of Space Technology, Vietnam Academy of Science and Technology, Cau Giay, Hanoi
  • Bui Trung Thanh Hung Yen University of Technology and Education
Keywords: WiPE algorithm, Landsat-7/ETM satellite imagery, phân tích hình dạng quang phổ

Abstract

Identifying pixels on the water surface natural water is an important step before applying a specific algorithm to calculate water environment parameters from satellite imagery. A mistake can occur when detecting clouds on turbid water (due to glare) and detecting their shadows on any surface water. Some algorithms exist but their performance is unsatisfactory, especially on turbid waters where cloudless pixels are sometimes classified as clouds or earth, resulting in data loss. This is especially important for the satellite image sensing have high resolution, such as the observations made by the sensor ETM + on Landsat-7, OLI on Landsat-8 or MSI on Sentinel- 2. In this study, we develop a two-step algorithm to extract water pixels (called LS7WiPE) for the Landsat-7 / ETM + sensor based on our experience from the WiPE algorithm for OLI and MSI sensors (Dat et al., 2019).

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Published
2020-10-11
How to Cite
Dinh Ngoc Dat, Pham Van Bach Ngoc, Huynh Xuan Quang, Mai Thi Hong Nguyen, Doan Minh Chung, & Bui Trung Thanh. (2020). AUTOMATIC WATER SURFACE EXTRACTION ALGORITHM FOR LANDSAT7-ETM+ SATELLITE IMAGE OVER COASTAL AND INLAND WATERS. UTEHY Journal of Science and Technology, 27, 74-80. Retrieved from http://tapchi.utehy.edu.vn/index.php/jst/article/view/392