衛星画像情報を用いた海洋波浪の把握 : ひまわり画像を用いた雲の分類

概要

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Instead of deploying direct sea-state monitoring systems, the authors propose a method for indirect measurement of sea-state condition using information obtained by satellite remote sensing. Using remotely sensed visible(VIS) and infrared(IR) images from "GMS"(Geostationary Meteorogical Satellite), cloud-systems are extracted. Considering that two main cloud-systems, the Stratus(St) and Cumulus(Cu), are closely related to the height, thickness, edge-slope and complexity of cloud-system, they develop a method to discriminate these two cloud-systems. The area of cloud-system is obtained by determining threshold brightness temperature using VIS and IR images. The height, thickness and edge-slope are analyzed using the temperature and picture element. The complexity of fringe of cloud-system is analyzed by introducing the fractal dimension. The fuzzy integral method with fuzzy measures is applied for the discrimination of cloud-systems. They show that the proposed method is quite useful to discriminate cloud-systems, because that it can indicate the possibility of Stratus and Cumulus for each cloud-system.
社団法人日本船舶海洋工学会の論文