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.
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。
In order to protect the copyright of the vector graphics, in this paper we introduce a fusion rule for watermark detection of vector curves using SVM classification.
针对矢量图形的版权保护问题，提出了一种基于SVM分类融合的多矢量曲线水印检测方法。
If the position of the feature points is stored in a database or in the file head of the watermarked image, the original image is not necessary for watermark detection.
将特征点位置存放在数据库或图像文件头中，提取时无需原始图像。
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