The health study of seagrass and coral REFF by underwater hyperspectral imager

Two types of hyperspectral imager designed for underwater monitor was presented in this article. Active hyperspectral imager with light source compensated the lack of near infared ray in the sea water. The pushbroom hyperspectral imager was built in V-FIN (Vehicle for Instrumentation) and push broom scanning by a boat, which was good for studying some area monitored with full spectral image. The spectral range of both hyperspectral imagers is between 400 and 900nm. The living health of coral reefs and sea grass were the task for ocean ecology observation. These preliminary results was to verify the possibility of pushbroom hyperspectral image grabbing under water and the health monitor of coral reef and sea grass by specta reflectance given from both hyperspectral imager.