Guo, Jing-Ming, and Sankarasrinivasan Seshathiri. 2019. “Watermarking in Dot-Diffusion Halftones Using Adaptive Class-Matrix and Error Diffusion”. ECTI Transactions on Computer and Information Technology (ECTI-CIT) 13 (1):1-8. https://doi.org/10.37936/ecti-cit.2019131.189387.