Color Image Watermarking Using the Spatio-Chromatic Fourier Transform. - Tsz Kin Tsui; Xiao-Ping (Steven) Zhang; Dimitri Androutsos (ICASSP (2), 2006)

Quaternion image watermarking using the spatio-chromatic fourier coefficients analysis. - Tsz Kin Tsui; Xiao-Ping (Steven) Zhang; Dimitrios Androutsos (ACM Multimedia, 2006)

Color Image Watermarking Using Multidimensional Fourier Transforms. - Tsz Kin Tsui; Xiao-Ping (Steven) Zhang; Dimitrios Androutsos (IEEE Trans. Inf. Forensics Secur., 2008)