Fig. 1. Schematic diagram of LIBS experimental setup

Fig. 2. LIBS spectra of three kinds of leaves

Fig. 3. Scores of the first two principal components of three kinds of leaves

Fig. 4. The scatter diagram of the firsttwo discriminant functions of training set samples

Fig. 5. The scatter diagram of the first two discriminant functions of test set samples

Fig. 6. Three Mahalanobis distances of each test set sample

Fig. 7. Classification results of test set samples

Fig. 8. SVM parameter optimization

Fig. 9. Classification results of SVM