Face Detection with Occlusions

We describe a new framework, based on boosting algorithms and cascade structures, to efficiently detect faces with occlusions. While our approach is motivated by the work of Viola and Jones, several techniques have been developed for establishing a more general system, including (i) a robust boosting scheme, to select useful weak learners and to avoid overfitting; (ii) reinforcement training, to reduce false-positive rates via a more effective training procedure for boosted cascades; and (iii) cascading with evidence, to extend the system to handle occlusions, without compromising in detection speed. Experimental results on detecting faces under various situations are provided to demonstrate the performances of the proposed method.