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This paper proposes a removable visible watermarking system based on a dual watermark technique and blind removal. A visible watermark pattern is embedded in the cosine discrete transform (DCT) domain, taking into consideration the texture and luminance features of the watermark and host images to create a visible watermarked image. To prevent illegal visible watermark removal, the original watermark...
Visible watermarking has been an important research area, widely studied and used for copyright protection over the years. However, new visible watermark removal-oriented attacks and techniques have emerged. Although these methods provide high quality resultant images, the main part of the attack consists of manual detection of the watermark pattern. Considering that visible watermark pattern can...
We present a robust DFT-based watermarking method applied to medical imaging stored in DICOM standard format. The watermark is a 1-D binary pseudo-random pattern generated by a secret key which is embedded into the magnitude of the DFT middle frequencies of the original image in order to preserve a high quality perception. To increase security of the watermark, data bits are scrambled using a secret...
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