Figure 2

Application of the tumour extraction algorithm to different basal cell carcinoma subtypes. The algorithm was applied basal cell carcinoma images of the infiltrative (A), nodular (D), and superficial (G) subtypes. The white pixels correspond to the regions identified by the algorithm as tumour nests (B, E, H). The performance of the algorithm was evaluated by identifying pixels containing true positive pixels (white), false negative pixels (blue), and false positive pixels (red) in each image (C, F, I).