標題: Authentication and recovery of an image by sharing and lattice-embedding
作者: Lin, Sian-Jheng
Lin, Ja-Chen
資訊工程學系
Department of Computer Science
公開日期: 1-Oct-2010
摘要: Based on sharing and lattice-embedding techniques, we present an authentication-recovery method for an image. The recovery data are shared among many shadows, then lattice-embedding is utilized to embed each shadow in the discrete cosine transform domain of an 8x8 block. The proposed method can resist certain content-preserving operations such as JPEG compression, Gaussian noise, and brightness adjustment, up to a tolerance level controlled by a quantization parameter value. The method can also resist certain security attacks such as a cut-and-paste attack, a collage attack, and a vector quantization attack. Compared with previous works, the proposed method has following major advantages and novelty: (1) the method does not require prediction of the tampering trace, and the tampered blocks are always recovered as long as the number of valid blocks reaches a threshold and (2) lattice-embedding yields smaller distortion than does parity-check quantization, and the latter was often used in reported works. (C) 2010 SPIE and IS&T. [DOI: 10.1117/1.3500799]
URI: http://dx.doi.org/10.1117/1.3500799
http://hdl.handle.net/11536/32090
ISSN: 1017-9909
DOI: 10.1117/1.3500799
期刊: JOURNAL OF ELECTRONIC IMAGING
Volume: 19
Issue: 4
結束頁: 
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