基于像素交换及时空混沌映射的信息隐藏方法

Information hiding algorithm based on pixel-value exchange and spatiotemporal chaos mapping

提出了一种在图像载体中进行信息隐藏的新方法。该方法通过硬c均值聚类分析,确定可嵌信息区域,在可嵌信息区域内的相邻像素间通过像素交换来编码信息。采用时空混沌置乱技术,控制秘密信息的嵌入过程,并对嵌入信息进行加密。该方案具有较好的视觉隐蔽性及统计隐蔽性,并且密钥空间大,实现了算法可公开的信息隐藏。

A novel information hiding scheme is presented.The pixel-value exchanging operation is used to embed the secret message at the adjacent pixels of the texture regions of the cover image depending on their complexity.The complexity identification is based on the hard c-means cluster.The bits from the secret data are embedded into the texture regions in random order determined by the scrambling technology based on spatiotemporal chaos mapping.The initial parameters of the spatiotemporal chaos mapping can act as the private keys,which can provide larger key space.The imperceptibility of the method is very high. The secret data is extracted from the embedded image without the original dada from the cover image.