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Very fast watermarking by reversible contrast mapping
Abstract
International audienceReversible contrast mapping (RCM) is a simple integer transform that applies to pairs of pixels. For some pairs of pixels, RCM is invertible, even if the least significant bits (LSBs) of the transformed pixels are lost. The data space occupied by the LSBs is suitable for data hiding. The embedded information bit-rates of the proposed spatial domain reversible watermarking scheme are close to the highest bit-rates reported so far. The scheme does not need additional data compression, and, in terms of mathematical complexity, it appears to be the lowest complexity one proposed up to now. A very fast lookup table implementation is proposed. Robustness against cropping can be ensured as well- info:eu-repo/semantics/article
- Journal articles
- [INFO.INFO-CV]Computer Science [cs]/Computer Vision and Pattern Recognition [cs.CV]
- [INFO.INFO-MM]Computer Science [cs]/Multimedia [cs.MM]
- [INFO.INFO-IT]Computer Science [cs]/Information Theory [cs.IT]
- [MATH.MATH-IT]Mathematics [math]/Information Theory [math.IT]