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Computer Standards & Interfaces. 01/2009; 31:757-762.
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J. Electronic Imaging. 01/2008; 17:023006.
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IJPRAI. 01/2007; 21:831-853.
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ABSTRACT: This paper presents a novel color image watermarking scheme for both tamper detection and tampered image recovery. The proposed scheme embeds watermarks consisting of the authentication data and the recovery data into image blocks. In the tamper detection process, instead of independently examining each embedded authentication data, we take all the authentication data embedded in an image into account and utilize a majority-voting technique to determine the legitimacy of image blocks. Experimental results show that the proposed scheme can effectively thwart collage attack and vector quantization (VQ) attack, while sustaining superior accuracy of tamper localization. Furthermore, the results reveal that the tampered images can be successfully recovered with acceptable visual quality.
Computer Standards & Interfaces. 01/2007;
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ABSTRACT: A digital image copyright protection scheme based on visual cryptography VC and singular value decomposition SVD techniques is proposed. In the proposed scheme, a master share is first constructed by applying SVD to a host image. Then, the master share is used to-gether with a secret image to construct an ownership share, according to a two-out-of-two VC scheme. The secret image for ownership identifica-tion can be revealed by stacking the master share, and the ownership share. The proposed scheme embeds the secret image without modify-ing the host image. In addition, the hidden secret image can be extracted without resorting to the original host image and the aid of computers. Experimental results show that the proposed scheme, compared with existing schemes, achieves stronger robustness against several com-mon attacks. © 2007 Society of Photo-Optical Instrumentation Engineers.
01/2006; 8.
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ABSTRACT: In recent years, various fragile watermarking schemes have been proposed for image authentication and integrity verification. In this paper, a novel block-based fragile watermarking scheme for image authentication and tamper proofing is proposed. Realizing that block-wise dependency is a basic requirement for fragile watermarking schemes to withstand counterfeiting attacks, the proposed scheme uses the fuzzy c-means (FCM) clustering technique to create the relationship between image blocks. The effectiveness of the proposed scheme is demonstrated through a series of attack simulations. Experimental results show that the proposed scheme not only provides satisfactory imperceptibility, but also achieves superior tamper detection and localization accuracy under different attacks, such as the cut-and-paste attack and the vector quantization (VQ) attack.
Expert Systems with Applications.
