Blind Scheme of Color Image for Readable Watermark Based on Diversity and ALE
Liyun Su · Jisuanji gongcheng · 2007
Based on the theory in which diversity can improve receiving performance,color image is regarded as multi-channel of communication.Readable watermark,modulated by sine wave,is chaos-scrambled and is embedded into wavelet domain of 3 channels of color image respectively.In detection,based on the good separation of ALE to broadband signal and narrowband signal,using LMS algorithm,the modulated watermarks will be extracted from channels adaptively and are accumulated.A correlation receiver of watermark is devised for the optimum blind detection.The experimental results validate the theoretic deduction.