A dual watermarking technique for images
MULTIMEDIA '99 Proceedings of the seventh ACM international conference on Multimedia (Part 2)
Multimedia Data Hiding
Multimedia Security: Steganography and Digital Watermarking Techniques for Protection of Intellectual Property
Adaptive Visible Watermarking of Images
ICMCS '99 Proceedings of the IEEE International Conference on Multimedia Computing and Systems - Volume 2
Digital Watermarking and Steganography
Digital Watermarking and Steganography
Visual cryptography for digital watermarking in still images
PCM'04 Proceedings of the 5th Pacific Rim Conference on Advances in Multimedia Information Processing - Volume Part II
Improved spread spectrum: a new modulation technique for robust watermarking
IEEE Transactions on Signal Processing
Attacking visible watermarking schemes
IEEE Transactions on Multimedia
IEEE Transactions on Information Theory
Secure spread spectrum watermarking for multimedia
IEEE Transactions on Image Processing
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A novel data hiding scheme, denoted as unseen visible watermarking (UVW), is proposed. In UVW schemes, hidden information can be embedded covertly and then directly extracted using the human visual system as long as appropriate operations (e.g., gamma correction provided by almost all display devices or changes in viewing angles relative to LCD monitors) are performed. UVW eliminates the requirement of invisible watermarking that specific watermark extractors must be deployed to the receiving end in advance, and it can be integrated with 2-D barcodes to transmit machine-readable information that conventional visible watermarking schemes fail to deliver. We also adopt visual cryptographic techniques to guard the security of hidden information and, at the same time, increase the practical value of visual cryptography. Since UVW can be alternatively viewed as a mechanism for visualizing patterns hidden with least-significant-bit embedding, its security against statistical steganalysis is proved by empirical tests. Limitations and other potential extensions of UVW are also addressed.