PROBLEM TO BE SOLVED: To provide methods of calculating damage classification of pine wilt disease and apparatus for calculating damage classification of pine wilt disease which make the production of materials showing the damage situation of pine wilt disease in a Japanese red pine forest achievable in a short time and with high accuracy.SOLUTION: A method of calculating damage classification of pine wilt disease in which the number of Japanese red pines are calculated by the damage classification using the image data of a Japanese red pine forest produced based on spectral reflection properties of tree species included in photographed image data comprises a Japanese red pine forest tree apex imaging data production step S31 of producing imaging data of Japanese red pine forest tree apex, a Japanese red pine forest tree crown imaging data production step S32 of producing imaging data of Japanese red pine forest tree crown, a tree crown specific damage classification image data production step S33 of producing imaging data of damage classification by tree crown, a tree apex specific damage classification imaging data production step S34, a damage classification specific number calculating step S40 of calculating the number of Japanese red pine trees by a damage classification, and a damage ratio classification figure production step S50 of producing a damage ratio classification figure.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2017,JPO&INPIT【課題】アカマツ林における松くい虫の被害状況を示す資料の作成を安価な費用で短時間にかつ高精度に実現可能とする松くい虫の被害区分算定方法及び松くい虫の被害区分算定装置を提供する。【解決手段】撮影画像データに含まれる樹種の分光反射特性に基づいて作成されたアカマツ林画像データを用いて、アカマツの本数を被害区分別に算定する松くい虫の被害区分算定方法であって、アカマツ林樹頂点画像データを作成するアカマツ林樹頂点画像データ作成ステップとS31と、アカマツ林樹冠画像データを作成するアカマツ林樹冠画像データ作成ステップS32と、樹冠別被害区分画像データを作成する樹冠別被害区分画像データ作成ステップS33と、樹頂点別被害区分画像データ作成ステップS34と、アカマツの本数を被害区分ごとに算定する被害区分本数算定ステップS40と、被害率区分図を作成する被害率区分図作成ステップS50とを有する。【選択図】図2
