ハイパスペクトル画像のマッチドフィルトリングによるオギとヨシの分布と存在量の推定

概要

論文の詳細を見る
More than 40 endangered plants listed in the national red list are growing in moist tall grasslands of Watarase wetland, the largest lowland wetland, in Japan. The dominant plants in grasslands are Miscanthus sacchariflorus and Phragmites australis, and each endangered species is associated with the habitats where either grass species is predominate, or both are mixed more evenly. Therefore, estimation of the relative dominance of M. sacchariflorus or P. australis may help in evaluation of the potential habitat area of the individual endangered species. In this study, matched filtering (MF), a specialized type of spectral mixture analysis, was used to estimate the abundance and distribution of M. sacchariflorus and P. australis from Airborne Imaging Spectrometer for Applications (AISA) data. Correlation analysis of the MF results and ground truth data was conducted to determine the accuracy of the estimates. Overall performance of MF for estimating amount of M. sacchariflorus was good with correlation coefficient of 0.89 for shoot density, and 0.78 for total stem volume. However, a poor estimate was obtained for P. australis with correlation coefficient of 0.43 for shoot density and 0.58 for total stem volume. Possible reasons for the difference in the accuracy estimates were discussed in this paper.
生態工学会の論文
2006-04-30