A lossless watermarking technique for halftone images

Authors:
Ping-Sung Liao;Jeng-Shyang Pan;Yen-Hung Chen;Bin-Yih Liao
Affiliations:
Department of Electronic Engineering, Cheng-Shiu University, NiaoSong Township, Kaohsiung County, Taiwan;Department of Electronic Engineering, National Kaohsiung University of Applied Sciences, Kaohsiung, Taiwan;Department of Electronic Engineering, National Kaohsiung University of Applied Sciences, Kaohsiung, Taiwan;Department of Electronic Engineering, National Kaohsiung University of Applied Sciences, Kaohsiung, Taiwan
Venue:
KES'05 Proceedings of the 9th international conference on Knowledge-Based Intelligent Information and Engineering Systems - Volume Part II
Year:
2005

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Abstract

In this paper, a lossless watermarking technique in dealing with halftone images is proposed to achieve both copyright protection and exact recovery of the original halftone image with legal authorization. Experimental results show that pattern substitution along with an appropriate block cutting on a halftone image makes possible the positive recovery of the original halftone image after the extraction of a watermark.