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Digital Watermark Image Based on Discrete Cosine Transformation

Ding Wei; Yan Weiqi; Qi Dongxu (CAD Laboratory, Institute of Computing Technology, Chinese Academy of Sciences, 100080, Beijing,CAD Research Center, North China Univ. of Tech., 100041, Beijing)  
Starting from discrete cosine transformation, this paper presents a new way to embed digital watermark in images. This method accords with JPEG, MPEG image compression standard. It can no only easily embed watermark into images, but al-so produce a better effect of embedded images even after JPEG, MPEG compression.The method solves the problem of digital watermark image loss caused by images energy loss.
【Fund】: 国家973计划资助;;国家自然科学基金
【CateGory Index】: TP393
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