カラー航空写真上の季節の色調変化からみた里山構成樹種の識別に関する研究(平成14年度 日本造園学会研究発表論文集(20))

It is important to spatially figure out the actual state of a coppice forest called "Satoyama" in Japanese in order to control and use Satoyama by effectively using its various functions. As part of such efforts, the seasonal change in the tone of nine representative tree species in Satoyama in the suburbs of Fukuoka City was analyzed using aerial color photographic data, and the possibility of tree species classification based on the characteristics of tone change was examined. As a result, evergreen broad-leaved trees showed distinctive tone change in spring, deciduous broad-leaved trees showed distinctive tone change in spring and autumn, while evergreen needle-leaved trees did not show distinctive tone change throughout the year, indicating that each of tree species has specific tone change. In addition, it was understood that the R value in the RGB data, as well as the H value (hue) and the I value (intensity) in the HSI data, clearly showed the change in the tone of trees, which was effective in classification of tree species. Furthermore, it has been understood that optimum observation periods for classification of tree species are May and December.