Adaptive Blind Watermarking Image Algorithm Based DWT and Its Realization
Meizhen Liu · Journal of Guangxi Academy of Sciences · 2007
A novel self adaptive digital image blind watermarking algorithm,aimed at the disadvantages of traditional method which combine spatial and DWT domain based on the characteristics of human visual system is put forward and realized.Patulous code is built by using local veins characteristic of image and encrypting means is introduced in the course of embedding watermark and it can adaptively adjust the quantized interval by calculating the border upon characters' mean value of the wavelet coefficients which is selected to embed watermark.Result of emulator experiment indicates that veracity of threshold value is higher than that of traditional method and is of better robustness.The new algorithm shows the following traits:easier actuality,less and faster calculation,better flexibility,great capacity of embedding information,and stronger operation capability.