Digital watermarking for volume data based on 3D-DWT and 3D-DCT

With the rapid development of computer multimedia, how to protect digital products from being copied, pirated and juggled has been an urgent issue in the information security field. Digital watermarking is a new method to solve the referred problems. This paper proposes a gray-level digital watermarking algorithm for volume data based on three-dimension discrete wavelet transform (3D-DWT), three-dimension discrete cosine transform (3D-DCT) and spread-spectrum communication techniques. The embedded watermark is not only invisible but also resistant to the common attacks such as cropping, adding noise, and filtering. The validity of proposed algorithm has been confirmed with experiments

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