该算法实现了基于dct域的图像水印算法，比较完整，清晰-The algorithm based on dct domain image watermarking algorithm, more complete, clear

基于SVD的dct域和DWT域的经典水印算法，该算法通过提取水印水印的主成分并把该主成分嵌入到奇异值矩阵，鲁邦性非常高。-the principal components of the watermark are embedded into the host image in discrete cosine transform (dct) and for the second method, those are embedded into the host image in discrete

提出了一种基于纠错编码的dct域数字水印算法,该算法在检测时不需要原始图像,实现了盲检。并且对水印图像进行了利用超混沌置乱处理,提高了安全性能和抗攻击能力。纠错编码的引入使水印抗攻击能力明显增强。 -dct digital watermarking algorithm based on error correction coding, the algorithm detected without the original image, blind. And watermark image o