DCT Watermarking Optimization by Genetic Programming. - Hanane Harrak; Thai Duy Hien; Yasunori Nagata; Zensho Nakao (Intelligent Information Systems, 2006)

Multichannel Color Image Watermarking Using PCA Eigenimages. - Kazuyoshi Miyara; Thai Duy Hien; Hanane Harrak; Yasunori Nagata; Zensho Nakao (Intelligent Information Systems, 2006)

Curvelet-Domain Image Watermarking Based on Edge-Embedding. - Thai Duy Hien; Ikeda Kei; Hanane Harak; Yen-Wei Chen 001; Yasunori Nagata; Zensho Nakao (KES (2), 2007)