A Novel Blind Watermarking Algorithm Joint JPEG Image Encoding and Cellular Automata
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摘要: 该文结合JPEG图像压缩编码和细胞自动机，提出一种用于JPEG压缩图像的数字盲水印算法。该算法先用Moore型细胞自动机对水印图像进行置乱；随后用2维正交细胞自动机变换将原始灰度图像进行分解，并在分解后得到的低频细胞自动机域系数中嵌入置乱后的水印信息。最后将嵌入了水印的图像按JPEG图像压缩标准进行编码。水印的提取是在解码过程中进行的。实验结果表明，该水印算法有较好的隐藏性；对常见的攻击如JPEG压缩、滤波、剪切、旋转以及加性噪声攻击等有较好的鲁棒性。Abstract: Cellular Automata (CA) and Cellular Automata Transfrom (CAT) are introduced, and a novel watermark algorithm joint JPEG image encoding and cellular automata is proposed. An image watermark is scrambled by Moore CA firstly. And then is embedded into the low-frequency subband, which is obtained after the transform of original image with CAT. Then the watermarked image is encoded according the JPEG image compression standard. The watermark is extracted in the decoding process. The experiments show that the proposed algorithm is robust to the common watermark attacks, such as JPEG compression attack, filter attack, rotation attack, and additive noise attack and so on.
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Key words:
- Digital watermark /
- Cellular Automata (CA) /
- Cellular Automata Transform (CAT) /
- JPEG
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