离散余弦变换和离散小波变换相结合的数字水印算法研究

On the Digital Watermarking Algorithm Combining Discrete Cosine Transform with Discrete Wavelet Transform

一种保护图像不被非法记录和转发的有效方法是在图像中嵌入数字水印。本文提出一种离散余弦变换与离散小波变换相结合的数字水印算法。实验结果证明,本算法虽然嵌入水印后图像的质量有所下降,但能够抵抗很多种类的攻击,具有具有良好的视觉效果和鲁棒性。

An effective way to protect images from illegal logging and forwarding is to embed watermark in im- paper presents a digital watermarking algorithm combining DWT and DCT. The experimental result this algorithm may make declined the quality of embedded watermarking images but can be resistant attacks, which has a good visual effect and robustness.