Figure 7

Illustration of the concept of our Eigen-disfigurement model. A shows the longitudinal changes of a patient who underwent reconstructive surgery on his right mandible and neck area (highlighted by yellow dashed circle). As shown, major structural and textural changes occur in the reconstructed area. B shows images of the same patient with varying degrees (i.e., λ values) along the direction of the first principal component. As the λ value deviates from 0, the degree of disfigurement increases. Specifically, as its value deviates towards −1, the texture/color of the disfigured region deviates (i.e., darker) from that of the typical healthy face. Moreover, as its value deviates towards 1, the structure of the disfigured region deviates from that of the typical healthy face. Thus the first principal component was sufficient to capture the disfigurement of the patient.