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Histogram-based reversible data hiding for vector quantisation-compressed images

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1 Author(s)
Tsai, P. ; Dept. of Comput. Sci. & Inf. Eng., Nat. United Univ., Miaoli

Reversible data hiding is required and preferable in many applications such as medical diagnosis, military, law enforcement, fine art work and so on. The author proposes to use reversible data hiding applications with a vector quantisation (VQ)-compressed image. The histogram of the prediction VQ-compressed image is explored. The prediction VQ encoded image is identical to traditional VQ encoding. The index of prediction encoded VQ images is modified to embed secret data. Furthermore, the VQ images can be completely reconstructed by the recovery procedure. The experimental results show the performance of the proposed method and the efficiency of the embedding, extraction and recovery procedures. In comparison with other VQ-based schemes, the proposed method provides a higher hiding capacity and a better stego-image quality. Also, the lossless VQ image is recovered.

Published in:

Image Processing, IET  (Volume:3 ,  Issue: 2 )

Date of Publication:

April 2009

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