Detection of Microphytobenthos Using Spectral UnmixingMethod in the Saemangeum Tidal Flat, Korea

摘要

Microphytobenthos that supply nutrients to the intertidalecosystem play an important part as a primary producer.If we estimate distribution and density of microphytobenthos,we can possibly calculate a volume of primary product in thetidal flat and its effect to the intertidal ecosystem. To estimatethe portion of microphytobenthos, we used a linear spectralunmixing (LSU) method. LSU is a tool for inference the proportionsof the pure components (or end-members) in a mixedpixel. The selection of end-members is critical to LSU. Theend-members can be selected either from spectral libraries builtfrom field surveys or from a remotely sensed image. We comparedthe two approaches of end-member selection, and thepreliminary results showed end-members from from spectrallibrary are as effective as those from image itself.