Abstract: The paper, by adopting jointly Artificial Neural Network （ANN）, general Amold mapping, and statistical methods, intends to formulate an algorithm based on image spatial domain watermark. While the ANN was used as the texture analyzer of the original image, the texture zone of the original image would be given prominently. The safety of the watermark was improved by using the amold mapping rearrangement. An optimizing strategy of minimizing the changes of pixels was adopted when the watermark is embedded. The application of statistical method guaranteed the sightlessness and the robustness of the digital watermark information. The experimental results demonstrate that the watermark is robust against cut attack, salt-pepper noise attack, Least Significant Bit (LSB) attack, winner attack, and so on.

Key words: Artificial Neural Network （ANN）, watermarking, cat mapping, robustness

摘要： 将人工神经网络（ANN）、广义猫映射及概率统计等知识相结合构造了一种图像空间域水印算法。采用神经网络作为载体图像的纹理分类器，突出原始图像的纹理区。使用广义猫映射对水印进行置乱预处理，提高了水印信息的安全性。水印嵌入时采用最小化像素改变的优化策略，提取时应用概率统计等知识较好地实现了水印信息不可见性和鲁棒性的统一。实验结果表明，该方法能有效地抵抗剪切攻击、噪声攻击、最低有效位（LSB）攻击、滤波攻击等。

关键词: 人工神经网络, 水印, 猫映射, 鲁棒性