A Semi-fragile Watermarking Algorithm for Authenticating 2D Engineering Graphics Based on Log-Polar Transformation. - Fei Peng 001; Re-Si Guo; Chang-Tsun Li; Min Long (ISDF, 2009)

A semi-fragile watermarking algorithm for authenticating 2D CAD engineering graphics based on log-polar transformation. - Fei Peng 001; Re-Si Guo; Chang-Tsun Li; Min Long (Comput. Aided Des., 2010)