Sphere-packings, lattices, and groups
Sphere-packings, lattices, and groups
Elements of information theory
Elements of information theory
Digital watermarking
Informed Watermarking
Computer Methods for Mathematical Computations
Computer Methods for Mathematical Computations
IEEE Transactions on Signal Processing
Scalar Costa scheme for information embedding
IEEE Transactions on Signal Processing
Asymptotically dense spherical codes. I. Wrapped spherical codes
IEEE Transactions on Information Theory
Asymptotically dense spherical codes .II. laminated spherical codes
IEEE Transactions on Information Theory
IEEE Transactions on Information Theory
Applying informed coding and embedding to design a robust high-capacity watermark
IEEE Transactions on Image Processing
Fast informed embedding in dirty-paper trellis-code with orthogonal arcs
Proceedings of the 4th ACM international workshop on Contents protection and security
Compressive-sensing based watermarking scheme for sparse image tampering identification
ICIP'09 Proceedings of the 16th IEEE international conference on Image processing
Dirty-Paper trellis-code watermarking with orthogonal arcs
PSIVT'06 Proceedings of the First Pacific Rim conference on Advances in Image and Video Technology
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A new informed image watermarking technique is proposed incorporating perceptual factors into dirty paper coding. Due to the equi-energetic nature of the adopted codewords and to the use of a correlation-based decoder, invariance to constant value-metric scaling (gain attack) is automatically achieved. By exploiting the simple structure of orthogonal and Gold codes, an optimal informed embedding technique is developed, permitting to maximize the watermark robustness while keeping the embedding distortion constant. The maximum admissible distortion level is computed on a block by block basis, by using Watson’s model of the Human Visual System (HVS). The performance of the watermarking algorithm are improved by concatenating dirty paper coding with a turbo coding (decoding) step. The validity of the assumptions underlying the theoretical analysis is evaluated by means of numerical simulations. Experimental results confirm the effectiveness of the proposed approach.