A block-based watermarking scheme for image tamper detection and self-recovery

Please use this identifier to cite or link to this item: https://irlib.pccu.edu.tw/handle/987654321/26796

Title:	A block-based watermarking scheme for image tamper detection and self-recovery
Authors:	Chang, YF (Chang, Y.-F.) Tai, WL (Tai, W.-L.)
Contributors:	Dept Informat Commun
Keywords:	Fragile watermarking image authentication tamper localization tamper detection
Date:	2013-06
Issue Date:	2014-02-26 15:52:56 (UTC+8)
Abstract:	In this paper, we present an effective block-based digital fragile watermarking scheme for image tamper detection and recovery. The proposed scheme embeds watermarks consisting of the authentication data and the recovery data into image blocks. It adopts parity check and the intensity-relation check to thwart various malicious attacks. In the tamper detection process, instead of independently testing the embedded authentication data of each block, we take the block-neighbourhood into account and utilize a hierarchical structure to determine the legitimacy of image blocks. Experimental results show that the proposed scheme can effectively resist collage attack, vector quantization (VQ) attack and constant-average attack, while sustaining superior accuracy of tamper localization. Furthermore, the results reveal that the tampered images can be successfully self-recovered with acceptable visual quality.
Relation:	OPTO-ELECTRONICS REVIEW Volume: 21 Issue: 2 Pages: 182-190
Appears in Collections:	[Department of Information Communications & Graduate Institute of Information Communications ] journal articles

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