Fig. 5
ROC curves for the classification of iRBCs and pWBCs in P. yoelii blood smears. Linear discriminant analysis was used to develop an algorithm to classify iRBCs and pWBCs based on the measured haemozoin feature values; corresponding ROC curves (black line) are shown for algorithms based on Hz deff (left), RID (middle), and the combined feature (right). The area under the curve (AUC) increased when late trophozoites were removed from the analysis (blue line). The AUC decreased when young trophozoites were removed from the data set and only late trophozoites were included in the analysis (red line)