Fig. 10From: Rapid determination of chemical composition and classification of bamboo fractions using visible–near infrared spectroscopy coupled with multivariate data analysisPCA analysis of mature bamboo fractions based on different raw spectral regions: a raw visible light spectral region; b raw NIR spectral region; and c raw visible–near infrared spectral region. (O—bamboo green; M—bamboo timber; I—bamboo yellow; K—bamboo node; B—bamboo branch)Back to article page