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Please use this identifier to cite or link to this item: http://hdl.handle.net/1783.1/3128
Title: A robust public watermark for halftone images
Authors: Fu, Ming Sun
Au, Oscar C.
Keywords: Copy protection
Copyright
Image coding
Message authentication
Issue Date: 2002
Citation: Proceedings IEEE International Symposium on Circuits and Systems, 2002. ISCAS 2002. 26-29 May 2002, Arizona, USA. v.3, p.639-642
Abstract: In many printer and publishing applications, it is desirable to embed data in halftone images for copyright control and authentication purposes. While intentional attacks on printed matters may not be likely, unintentional attacks such as cropping and distortion due to dirt or human writing/marking are likely. In this paper, we proposed a novel halftone image watermarking method called Watermarking Error Diffusion (WED) to embed a robust, invisible, public watermark in the parity domain of halftone images during halftoning while introducing minimal distortion. Since WED uses the local stochastic properties of the halftone image to embed the watermark throughout the whole image, WED is robust to cropping and distortion due to dirt or human writing/marking. Experimental results suggest that WED can give halftone images with good visual quality and the watermark is robust to crop and human marking.
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URI: http://hdl.handle.net/1783.1/3128
Appears in Collections:ECE Conference Papers

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