Figure 1

Feature set overview. Main feature displayed in the first column: (1A) texture, (2A) heightmap. (3A) curvature. The remaining columns show edge enhancements of the main features: (B) derivative over x-axis, (C) derivative over y-axis, (D) Laplacian of Gaussian filter, (E) Sobel filter. For illustration purposes, the face used in this image is that of author MadJ who was not a participant this study.