DMCA
Hiding Data in VQ-compressed Images Using Dissimilar Pairs
| Citations: | 1 - 1 self |
BibTeX
@MISC{Lin_hidingdata,
author = {Chih-yang Lin and Chin-chen Chang},
title = {Hiding Data in VQ-compressed Images Using Dissimilar Pairs},
year = {}
}
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Abstract
Abstract. Steganography is the art and science of embedding secret data in another medium to prevent the leakage of secret information. A VQ-based (vector quantization) steganographic method usually involves changes of the block values in the VQ images, which might cause serious distortion. As a result, many existing methods use closest pairs or clustering techniques to preserve an acceptable image quality. In this paper, we propose a new VQ steganographic method for preserving extremely high image quality. Instead of finding similar pairs, the proposed method uses a pair of dissimilar codewords to embed one secret bit in each image block. The property of dissimilar pairs allows the VQ image to be nearly fully recovered after extraction of the secret bits. Experimental results show that our method keeps an acceptable embedding capacity but has much better image quality than existing schemes.
Keyphrases
dissimilar pair vq-compressed image vq image secret bit dissimilar codewords vector quantization steganographic method acceptable image quality similar pair new vq steganographic method image block secret information serious distortion image quality high image quality block value acceptable embedding capacity experimental result secret data
