一种基于小波系数和混沌序列的图像认证方法

A Method for Image Authentication Based on Wavelet Coefficients and Chaotic Sequences

提出了一个新的基于小波系数和混沌序列的图像认证方法.首先对图像进行小波变换,利用混沌序列对低频系数进行编码,然后对编码后的系数进行小波逆变换得到处理后的图像.进而把加密后版权信息插入到图像的LSB,从而保证数字图像的完整性和真实性.实验表明,该算法是一个有效的、实用的图像认证算法.

A novel image authentication algorithm was proposed, which was based on wavelet coefficients and chaotic sequences. A wavelet transform was performed on the image, and its low-pass coefficients were coded with chaotic sequences. Then, an inverse transform of the coded coefficients would produce the revised image which could ensure the integrality and authenticity of the image. The experiment proves that this authentication method is very effective and useful.