摘要
提出一种基于Turbo码和HVS的扩频数字水印算法。首先采用混沌系统和m序列对水印置乱,将其进行Turbo码编码,再将载体图像分块,依据人眼视觉特性,选取纹理特征相对较好的子块进行小波分解,嵌入水印信息。实验结果表明,该算法可有效提高水印的安全性,具有较好的鲁棒性和不可见性。
A new spread-spectrum digital image watermarking based on Turbo code and the DWT is proposed. First, chaotic sequences and m sequences are used to disorder watermarking, which is coded by Turbo code. Sec- ond, the host image is divided into small blocks （4 x 4 pixels） , and the watermark is inserted in the texture area. The experimental results show that the algorithm not only improves the security of the watermarking, but also a- chieves better invisibility and robustness.
出处
《电子科技》
2013年第3期140-142,共3页
Electronic Science and Technology
