1. Face recognition: A literature survey;Zhao;ACM Computing Surveys,2003
2. Image-based face recognition: Issues and methods;Zhao,2002
3. X. Lu, Image analysis for face recognition, personal notes, May 2003
4. Detecting faces in images: A survey;Yang;IEEE Trans. Pattern Anal. Mach. Intell.,2002
5. Tracking colour objects using adaptive mixture models;McKenna;Image Vision Computing,1998