Fig. 8

Comparison of the proposed method to a GrabCut-based approach. Three examples (RGB video) are depicted in the state of the initial ROI detection. The first column shows the result of the skin classifier. Similar as in our method, it was used as initialization for GrabCut although morphological closing was performed beforehand (see [39]). The last two columns show the final ROIs (only contour) in which the red arrows highlight the lack of performance of GrabCut. Please note that in case the patient was identifiable, the eye section in the depicted images was blurred. Due to eyebrows, eyelashes, and shadowing effects, the region around the eyes usually appears darker than the surrounding area