Automated Water Finders for Radar Imagery
ARMY TOPOGRAPHIC ENGINEERING CENTER FORT BELVOIR VA
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An automated method for findings and extracting water regions from Synthetic Aperture Radar SAR imagery is presented. Three automated water finders are implemented for experimentation with two sets of SAR imagery obtained from the areas of Elizabeth City and Asheboro, North Carolina. The input radar image is first segmented into four categories of terrain features. They are water, field, forests, and built-up areas. Water regions from the segmented image are extracted and the remaining image is eliminated. Noise appearing on both water and non-water regions is smoothed and thus completes the automated water finding task. A second water finder with a relatively higher threshold for the region growing process was designed for extracting shallow water regions from some SAR images. Discrimination of non-water features having water like gray values is accomplished by using a third water finder equipped with an additional capability of computing and examining region properties.
- Physical and Dynamic Oceanography
- Hydrology, Limnology and Potamology
- Active and Passive Radar Detection and Equipment