基于子采样方法的DCT域盲水印技术

A DCT blind image watermarking technology based on subsampling

提出了一种增强水印鲁棒性的盲水印算法。算法在DCT(离散余弦变换)变换域,采用子采样的方法,选择嵌入水印的位置;以视觉感知模型调节嵌入水印的强度。算法的提取不需要原始图像,实现了盲提取。实验结果表明,算法不仅具有较好的不可见性,水印信息在噪声干扰、滤波、图像压缩等攻击下具有较好的鲁棒性。

A blind robust watermarking algorithm is proposed in the paper. Base on the discrete cosine transform （DCT）, the method uses subsampling algorithm to choose the locations of the watermarking and used Watson＇ s perceptual model to adjust the strength of the watermarking. The extraction process of the algorithm does not need the primitive picture, it is blind watermarking algorithm. The experimental results indicate that the proposed scheme can assure good imperceptibility for watermarked image and is robust to additive noise, filtering, JPEG compression and most attacks.