19. An apparatus comprising: means for utilizing a selected portion of classifiers in detectors to determine coarse pose information for a candidate face in an image; means for determining fine pose information for the candidate face based at least in part on the determined coarse pose information; and means for employing another portion of the classifiers in the detectors to perform face detection based at least in part on the fine pose information to determine whether the candidate face corresponds to a face.
19. An apparatus comprising: means for utilizing a selected portion of classifiers in detectors to determine coarse pose information for a candidate face in an image; means for determining fine pose information for the candidate face based at least in part on the determined coarse pose information; and means for employing another portion of the classifiers in the detectors to perform face detection based at least in part on the fine pose information to determine whether the candidate face corresponds to a face. 20. The apparatus of claim 19 , further comprising means for rotating the image to verticality prior to performing the face detection.