Extraction of Shorelines from Optical and SAR Images Using Feature Analysis

• Main Authors: shyu, chii-chrong, 徐啟崇
• Other Authors: Chen liang-chien
• Format: Others
• Language: zh-TW
• Published: 1998
• Online Access: http://ndltd.ncl.edu.tw/handle/36057551428026604424

碩士 === 國立中央大學 === 土木工程學系 === 86 === Coastal zone monitoring is an important task in national development and environmental protection. In which,extraction of shorelines is the fundamental work of necessity. This investigation aims to extract shorelines in an automated way for optical and radar images. The use of images of this investigation comprises two parts, SPOT multispectral images and ERS-1 radar images. The main components of extraction of shorelines include : (1)obtaining a rough separation between the land and water and (2) refinement the rough land-water boundaries by edge detection and edge tracing algorithms to extract the accurate shoreline position. To assess the accuracy of shoreline position extracted automatically from the imagery,ground measurements by GPS were treated as references. The shoreline positions determined from the images were found to agree with the measured ground position to within one to two pixels.