Research and realization of text digital watermarking algorithm based on cloud model
Zhang Fei · Electronic Design Engineering · 2010
A novel text watermarking algorithm based on cloud model for copyright protection is presented.Using the ran-domness and fuzziness of cloud model,set the parameters of the cloud model as secret key,through the forward cloud gener-ator created watermark,the watermark mapped to a coordinate axis formed a cloud map.Adopting the wavelet-domain adap-tive quantization method,the quantization coefficients were chosen diversely according to the different embedded locations in wavelet domain,the watermarking was embedded in the vector text.After extracting the watermarking,it not only can be identified directly,but also can be got the parameters of the cloud model by reverse clouds generator,the method of ra-tion judgment was also given.Experimental results show that the text watermarking algorithm based on cloud model has better imperceptibility and robustness than the traditional watermarking,and can effectively protect the copyright of text works.