Fig. 2

ROC curves evaluated on the external test set. Subplot (a) presents the ROC for the CNN-LSTM model (Jang et al.17), while (b) displays the ROC for the CNN-SVM model (Akbari et al.13). Subplot (c) illustrates the ROC for the random forest model (Sun et al.16), and (d) features the proposed model. Subplot (e) highlights the mean ROC curves of the proposed model and existing baselines, and (f) shows the mean ROC curves depending upon the input modality.