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A hierarchical multiscale and multiangle system for human face detection in a complex background using gravity-center template. MIAO Jun,YIN Baocai,WANG Kongqiao,et al. Pattern Recognition . 1999
[2]
The problem of compensating for changes in illumination direction. Yael ADINI,Yael MOSES,Shimon ULLMAN. IEEE Trans.on Face Recognition . 1997
[3]
A highly efficient system for automatic face region detection in MPEG video. WANG Hualu,CHANG Shi-fu. IEEE Trans.on Circuits Sys.Video Tech . 1997