A reversible watermarking scheme for 2D engineering graphics based on improved quantisation index modulation. - Fei Peng 001; Yu-Zhou Lei; Chang-Tsun Li; Yue Li 013 (ICDP, 2009)

A reversible watermarking scheme for two-dimensional CAD engineering graphics based on improved difference expansion. - Fei Peng 001; Yu-Zhou Lei; Min Long; Xingming Sun (Comput. Aided Des., 2011)

An Effective Reversible Watermarking for 2D CAD Engineering Graphics Based on Improved QIM. - Fei Peng; Yu-Zhou Lei (Int. J. Digit. Crime Forensics, 2011)