一种基于DWT&IE的彩色信息隐藏技术

Information hidden technology for colour image based on DWT&IE

提出了一种通过彩色图像空间转换,使其从RGB空间转到YCbCr空间的表示,再利用小波变换,将图像的彩色信息嵌入进YCbCr空间的Y分量中,并在原始图像信息的基础上生成基于原始图像的一个特征值(ImageEigen-value),应用于彩色信息的隐藏和重构的方法。图像的重构和再现仅有赖于原始图像的特征值,不需要原始图像即能达到真实图像彩色信息的重构,并具有防伪、鉴别和抗修改的效果。彩色图像的传播图像是一个具有纹理特征的灰度图,利于在网络平台传递,既可隐藏彩色信息,又可适当压缩图像;在不便提供原始图像的前提下,仅提供图像特征值,对图像文件的保护和彩色信息的隐藏有一定的参考意义。

Method for transforming the color image to the YCbCr space from the RGB is presented. By using the wavelet transformation, the image chromatic information is inserted into the Y component. Based on a primitive image, characteristic value （image eigen-value） renews the Y component to hide image＇s chromatic information. Reconstruction or reappearance of the image depends on the primitive image essential key value only, which does not need the primitive image. This method can achieve the forgery-proof and the distinction effect for a real image. Before the color image reconstruction, the product is the textural property gray image, which is useful across over the network. The method may both hide the chromatic information and compress the image suitably that certain reference use for image document＇s protection and chromatic information＇s hideaway, while the primitive image couldn＇t be reached, instead of image eigen value only.