Water Depth Determination Using Mathematical Morphology
Rapid determination of water depth near coastal areas is a practical problem of interest to Navy oceanographers and ships. Variations in depth both perpendicular and parallel to the shore are sought. Our aim is to create a semi-automated system for processing time sequences of remotely sensed images of wave crests to determine water depth. Using mathematical morphology to clean the images and find portions of contours parallel to the shoreline and time-stack images to determine wave phase speed both simplifies the analysis and requires significantly less processing time than previous manual or semi-automated methods. Depth results for the test image sequence discussed compare reasonably well to depths determined by sounding or ground sensors, but have large errors.
Key wordscoastal water depth mathematical morphology time-stack image remote sensing
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