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A Digital Image Watermarking Scheme Based on Vector Quantisation
Minho JO HyoungDo KIM
IEICE TRANSACTIONS on Information and Systems
Publication Date: 2002/06/01
Print ISSN: 0916-8532
Type of Manuscript: LETTER
Category: Image Processing, Image Pattern Recognition
digital image watermarking, vector quantisation, watermark spreading,
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Compared with much research in the spatial-domain and transform-domain watermarking techniques, VQ-based watermarking technique has not been fully treated. A digital image watermarking scheme based on vector quantisation (VQ) is proposed to improve the degree of spreading watermark information. By partitioning the codebook into 3 groups, the scheme tries to embed one binary information for each block. The scheme spreads the watermark information almost evenly over the image with little extra distortion. The experimental results prove the efficiency and effectiveness of the scheme.