而许多实际的应用都要求非对称的数字水印方案，即水印嵌入时使用私人密钥，水印检测时只需要一个公开密钥。

However, in many applications it needs an asymmetric scheme, where a private key is used for watermark embedding, and a public key is used for watermark detection.

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该算法不是采用传统的图像归一化技术，所以保证了水印图像的高透明性，即保证了嵌入水印后的图像的高质量。

The algorithm does not apply the traditional im - age normalization technique, so it guarantees watermarked image high transparency, that is to ensure high quality of watermarked image.

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