Fig. 6

Classification performance with Resnet18 network by heatmap transformation of serum SERS spectra. A The confusion matrix of the test set. B Loss function value of the test set. C Classification evaluation index of the test set. D ROC curves for all categories. E–K ROC curves and AUC values of HC, BC, LC, TC, CC, GC, and EC, respectively. L–O The classification evaluation metrics (Accuracy, Presicion, Recall, and F1-score) for each category