Figure 23

Performances of different detectors on faces turned 22.5° in (a) and 45° in (b). The detector Cascade is the upright face detector. The detector MaCascade is built from the upright face detector and aims to detect turned faces. Subwindow positions are modified and unavailable weak classifiers are handled by the naive approach. The detector MaMcCascade is the same detector as MaCascade except that unavailable weak classifiers are handled with a McCascade. The detector MaMcCascade multiview is a multiview system that combines three MaMcCascades: one for the angle 22.5°, one for 45°, and one for 67.5°.