Difference-Expansion Based Reversible and Visible Image Watermarking Scheme

淡江大學機構典藏 > 工學院 > 資訊工程學系暨研究所 > 期刊論文 > Item 987654321/112928

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题名:	Difference-Expansion Based Reversible and Visible Image Watermarking Scheme
作者:	Chien-Chang Chen, Yao-Hong Tsai, Hsin-Cheng Yeh
关键词:	Reversible watermark;visible watermark;difference expansion;partition strategy
日期:	2017-03
上传时间:	2018-03-13 12:10:12 (UTC+8)
摘要:	A reversible image watermarking scheme recovers the original cover image after extracting the embedded watermarks. A visible image watermarking scheme embeds watermarks to create a visible watermark effect on the cover image. A general reversible image watermarking scheme embeds invisible watermarks. This paper presents a reversible and visible image watermarking scheme that uses a conventional difference-expansion method. The cover image is first segmented to non-overlapped kk blocks. Each block is then applied to two watermarking schemes; a difference-expansion based invisible watermarking scheme and a visible watermarking scheme to embed one watermark bit. Exceeding numbers, larger than 255 or smaller than 0, generated from the difference-expansion method require being recorded for a lossless recovery. Experimental results show that the proposed scheme embeds visible watermarks with few recorded exceeding numbers. However, not recording any exceeding numbers still results in a high similarity of extracted watermark image and good quality of recovered cover image.
關聯:	Multimedia Tools and Applications 76(6), p.8497-8516
显示于类别:	[資訊工程學系暨研究所] 期刊論文

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