Wavelet Tree Group Modulation (WTGM) for Digital Image Watermarking. - Min-Jen Tsai; Chang-Hsing Shen (ICASSP (2), 2007)

Differential Energy Based Watermarking Algorithm Using Wavelet Tree Group Modulation (WTGM) and Human Visual System. - Min-Jen Tsai; Chang-Hsing Shen (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2008)

Multipurpose Image Watermarking Based on the Wavelet Tree Contrast Level Transformation. - Min-Jen Tsai; Chang-Hsing Shen; Jung Liu (ICC, 2009)