Patent ID: 7742627
Filing Date: 2010-06-22
Classification: G06K

Abstract:
1. A face detecting apparatus comprising: partial image generating means for scanning a subwindow, which is a frame that surrounds a set number of pixels, over the entirety of an image to generate a plurality of partial images; forward facing face detecting means for detecting partial images that include forward facing faces from among the plurality of partial images generated by the partial image generating means; profile face detecting means for detecting partial images that include faces in profile from among the plurality of partial images; detecting mode switching means for switching the detecting mode of the profile face detecting means to one of: a detection rate mode, in which the detection rate is increased; a false positive detection rate mode, in which the false positive detection rate is decreased; and a processing speed mode, in which the processing speed is increased; and parameter changing means, for changing profile face detecting parameters that determine the detection performance of the profile face detecting means according to each of the detecting modes, and for changing forward facing face detecting parameters that determine the detection performance of the forward facing face detecting means, wherein: the profile face detecting means comprises profile face classifiers that employ a plurality of discrimination results obtained by a plurality of weak classifiers to perform final discrimination regarding whether the partial images represent faces in profile; the forward facing face detecting means comprises forward facing face classifiers that employ a plurality of discrimination results obtained by a plurality of weak classifiers to perform final discrimination regarding whether the partial images represent forward facing faces; the profile face detecting parameters and the forward facing face detecting parameters are threshold values for discrimination scores of the plurality of weak classifiers of the profile face classifiers and the forward facing face classifiers when they discriminate whether the partial images represent faces in profile and forward facing faces; and the parameter changing means changes the threshold values for the discrimination scores according to each of the detecting modes.