Fig. 7From: Extraction of tree crowns damaged by Dendrolimus tabulaeformis Tsai et Liu via spectral-spatial classification using UAV-based hyperspectral imagesThe location of the study area. a, b Location of the study area in Liaoning Province. c Distribution of the study area on RGB image acquired from UAV on August 5, 2016. d Severe damaged trees’ photo in the field. The defoliation rate of this plot reached 100%, and almost 90% of plots are the same in the study areaBack to article page