摘要： 将二值水印信息预先嵌入载体图像中，计算查询水印与提取水印间的归一化相关系数值，得到检索结果。水印算法在离散余弦变换域进行，水印提取过程无需原始图像，具有良好的实时性。实验结果表明，基于数字水印的图像检索方法能保护数字作品的版权并实现图像检索。

关键词: 数字水印, 图像检索, 版权保护, 离散余弦变换

Abstract: This paper embeds the binary watermark information in carried image, computes the value of Normalized Correlation(NC) coefficient between query watermark and extracted watermark, and gains the retrieval results. The watermark algorithm is carried out in Discrete Cosine Transform(DCT) domain, and extracting process is instantaneous and blind. Experimental results show that this method based on digital watermark can protect the copyright and realize image retrieval.

Key words: digital watermark, image retrieval, copyright protection, Discrete Cosine Transform(DCT)

中图分类号: 

• TP391