Very fast watermarking by reversible contrast mapping
Very fast watermarking by reversible contrast mapping
复制标题
DOI：
10.1109/lsp.2006.884895
复制
发表时间：
2007-04-01
影响因子：
3.9
通讯作者：
Chassery, Jean-Marc
中科院分区：
文献类型：
--
作者：
Coltuc, Dinu;Chassery, Jean-Marc
可逆对比度映射（RCM）是一种适用于像素对的简单整数变换。对于某些像素对，即使变换像素的最低有效位（LSB）丢失，RCM也是可逆的。LSB占用的数据空间适合于数据隐藏。所提出的空域可逆水印方案的嵌入信息比特率接近迄今为止报道的最高比特率。该方案不需要额外的数据压缩，并且在数学复杂度方面，它似乎是迄今为止提出的最低复杂度的方案。提出了一种快速查找表的实现方法。也可以确保对裁剪的鲁棒性。
Reversible 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.