Chung-Chuan Wang Chin-Chen Chang Jinn-ke Jan NovelWatermarking Authentication Schemes for Binary Images Based on Dual-Pair Block Pixel Patterns. 125-155 2009 90 Fundam. Inform. 1-2 http://dx.doi.org/10.3233/FI-2009-0010 db/journals/fuin/fuin90.html#WangCJ09