Fig. 2From: Extraction of tree crowns damaged by Dendrolimus tabulaeformis Tsai et Liu via spectral-spatial classification using UAV-based hyperspectral imagesOptimized probability map obtained by JBF (the type of damaged Pinus tabuliformis). a The guidance image is RGB image, b the guidance image is PCA false-color image. JBF the joint bilateral filterBack to article page