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    基于图像特征和超混沌迭代的图像认证算法

    An Image Authentication Algorithm Based on Feature of Original Image and Hyperchaotic Iteration

    • 摘要: 提出了一种基于图像特征和超混沌迭代的图像认证算法.该算法从原始图像的小波分解中提取低频分量,并从其边缘中找出稳定的特征点,结合水印图像信息进行超混沌迭代得到索引集,版权者和第三信任方用私钥将索引集进行数字签名和加盖时间戳.水印的认证利用了第三信任方和版权者的公钥,而不需要原始图像参与.研究结果表明:该算法对噪声、滤波、压缩、旋转等图像处理方法具有较好的鲁棒性.

       

      Abstract: An image authentication algorithm based on feature of image and hyperchaotic iteration is proposed. The stable feature value is attained by extracting the edge of low-frequency components from wavelet transform of the original image. In order to get the indices set, hyperchaotic iteration is executed by combining the value with the information of watermarking. So the indices set is signed and timestamped by the owner and the trusted third party's private keys. By using the public keys, the image of watermark can be authenticated without the original image. The experimental results show the algorithm is robust to noise adding, filtering, compression, rotation.

       

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