一种新的彩色图像变换域全息水印算法

提出了一种变换域中改善全息水印抗几何攻击和滤波攻击性能的彩色图像全息水印算法。 取彩色 RGB载体图像的蓝色通道,分块后做一级小波分解转换到变换域,取低频子带,然后进行奇异值分解嵌入数字全息水印。 实验结果表明:该算法水印隐蔽性好,重建的水印与原始水印相似度高;算法鲁棒性强,可以抵抗常见的各种攻击,尤其改善了全息水印的抗几何攻击和滤波攻击性能,满足了数字防伪、版权保护的需要。

New Color Image Holographic Watermarking Algorithm in Transform Domain

A new color image holographic watermarking algorithm was proposed, which improve the robustness for geometric and filtering attacks. The blue channel of RGB mode host image was extracted; after blocking, the low frequency sub-band was achieved through DWT; then both SVD and Fourier hologram were applied to embed the watermark. Simulation results showed that the watermark has a good disguised ability, and the correlation of reconstructed watermark and the original watermark is high. Attacks results showed that the watermarking algorithm has high robustness and is able to resist common attacks, especially for geometric attacks and filtering attacks, which meets the need of digital anti-counterfeiting and copyright protection.