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This paper presents a multipurpose image watermarking scheme which embeds robust and fragile watermarks in the wavelet domain for image retrieval and content integrity verification simultaneously. The proposed scheme consists of two main phases, the offline process and the online retrieval process. In the offline process, the feature vector is extracted(More)
A novel robust digital image watermarking algorithm based on predictive vector quantization is proposed in this paper. The robust watermark is embedded in the image by selecting the prediction mode of each PVQ coded vector according to the watermark bit. The proposed watermarking algorithm is proved to be robust against both friendly and hostile attacks,(More)
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