A Novel Web Page Filtering System by Combining Texts and Images. - Zhouyao Chen; Ou Wu; Mingliang Zhu; Weiming Hu (Web Intelligence, 2006)

Recognition of Pornographic Web Pages by Classifying Texts and Images. - Weiming Hu; Ou Wu; Zhouyao Chen; Zhouyu Fu; Stephen J. Maybank (IEEE Trans. Pattern Anal. Mach. Intell., 2007)