Computer Science ›› 2014, Vol. 41 ›› Issue (12): 48-52.doi: 10.11896/j.issn.1002-137X.2014.12.011

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Digital Image Watermarking Algorithm Based on Dispersed Chaotic Mapping System

CHEN He-shan,LV Zhen-zhen and LUO Wei   

  • Online:2018-11-14 Published:2018-11-14

Abstract: This paper designed a digital image watermarking algorithm based on a dispersed chaotic mapping system and wavelet transform.In the process of preprocessing watermark,the Logistic mapping produces key to encrypt the grey value in the pixel to insure the security of watermark.In the process of embedding watermark,three-level wavelet decomposition on image is conducted and watermark is embedded in the high frequency wavelet coefficients according to the size of wavelet coefficients.Analysis and experiment results show that the algorithm possesses relatively strong robustness,and better security and transparency than ordinary algorithms.

Key words: Image watermarking,Dispersed chaotic mapping system,Logistic mapping

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