Departmental Bulletin Paper 衛星リモートセンシングを用いた海ゴミ検出法の改良

青山, 隆司  ,  Aoyama, Takashi  ,  永島, 隆也  ,  Nagashima, Takaya  ,  岩城, 克幸  ,  Iwaki, Katsuyuki

The flow of marine debris in the ocean causes extensive damage to coastal environments. It is considered important to understand the flow of marine debris in the ocean for environmental research purposes. The small size of most marine debris in the ocean means that marine debris cannot be confirmed directly, even when a high-spatial-resolution satellite image is used. Thus, in order to extract candidate pixels containing possible marine debris, pixels with spectra that differ from those of the surrounding ocean were identified. As a first step towards monitoring marine debris, a method for identifying marine debris floating on the ocean was proposed using the spectral angle mapper (SAM) algorithm in n-dimensional space corresponding to satellite spectral bands. The validity of the method using SAM was also shown. In this paper, a new method to discriminate marine debris from white crested waves is proposed using a distance from origin in n-dimensional scatter diagram. Moreover, a method to identify marine debris using pan-sharpened images is also discussed.

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