【摘要】 提出了一种有效的基于水印DCT的数字图像水印算法。该算法首先对水印图像进行离散余弦变换,再对变换后的水印图像进行加密,然后将加密后的水印图像嵌入到DCT变换后的原始图像中。实验证明在嵌入强度小于0.5,PSNR在大于32.4177dB时,该算法具有很好的鲁棒性和安全性,并能有效地抵抗JPEG压缩和较强的高斯白噪声。更多还原

【Abstract】 An efficient watermarking algorithm for digital image,based on watermark DCT,is proposed.The watermarking algorithm adopts the DCT and encryption technologies to the embedded watermark image.The experimental results show that the algorithm achieves better robustness and safety when the embedded watermark intensity is less than 0.5 and the PSNR is higher than 32.4177dB and can efficiently resist JPEG compression and the intense Gauss white noise.更多还原