Identification of Rhodiola fastigiata and Rhodiola quadrifida by Hyperspectral imaging technique
OBJECTIVE To identify the Rhodiola fastigiata and R.quadrifida by near-infrared hyperspectral imaging(HSI).METHODS HSI information of Rhodiola was collected in the wavelength range of 935 nm to 1720 nm.Principal component analysis(PCA)and Orthogonal partial least squares-discriminant analysis(OPLS-DA)were used for classification.RESULTS OPLS-DA had better classification performance than PCA,and the combination of HSI and OPLS-DA analysis could accurately identify the two Rhodiola species.CONCLUSION This method can quickly and nondestructively identify R.fastigiata and R.quadrifida,which provides reference for species identification,quality control and evaluation of Rhodiola medicinal plants.