【摘要】 针对最低有效位水印算法嵌入保真度较差、鲁棒性不高的问题,提出了一种全比特位(All Bits,AB)嵌入的空域数字图像水印算法,分别采用直线方式和三角函数方式将信息嵌入到视觉容易忽略的图像边缘区域。此算法不仅可以把水印嵌入到载体图像的低四位位平面,而且可以嵌入到高位位平面。在数字图像水印嵌入和提取的实验中,分别从主观视觉效果、客观参数(均方差、信噪比和峰值信噪比)的计算和对图像进行攻击等方面,证明这种AB空域数字水印算法具有更强的保真度和鲁棒性。更多还原

【Abstract】 Aiming at the problem of low fidelity robustness for the least significant bit(LSB) algorithm,a new digital image watermarking algorithm with all-bits-embedding(All Bits,AB) is presented to embed the watermarking information into the edge region which is always ignored by straight line and trigonometric function.Digital image watermarking can be embedded into the carrier image not only in the lowfour-bit plane,but can be in the high-bit plane.Experimental results verify the fidelity and robustness of AB watermarking algorithm from the subjective visual effects,objective parameters(MSE,SNR and PSNR) and image attacking tests.更多还原