Image Retrieval Scheme Based on Digital Watermark
Dongmei Wu · Jisuanji gongcheng · 2009
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.