基于BMP图像数据的信息隐藏方法

提出了一种通过增加BMP图像数据实现信息隐藏的方法.BMP图像的显示是根据文件头数据来确定图像数据的,与文件中图像数据以后的数据没有关系,将秘密信息嵌入到图像数据以后的字节中,只是增加了BMP文件的大小,并不影响图像的显示,从而实现信息隐藏.按照秘密信息的数据大小,从载密图像中读出秘密信息的字节数据,即可恢复秘密信息.该算法简单易行,载密图像和原图像在视觉上没有任何差别,具有较强的隐蔽性.仿真结果证明了算法的可行性和有效性.

Technique for Information Hiding Based on BMP Image

A method for information hiding based on BMP image is presented.The displayed image data is gotten according to the bitmap file-head data,and there is no relationship to the data following the image data in the file. When the secret information is embedded in the bytes following the image data,only the size of BMP file is increased,but don't influence the image to be displayed.As a result,the information is hidden.The secret information can be reconstructed by reading the data from the bytes embedded in the secret information in turn.There is not any visual difference between the cover image embedded in secret information and the original cover image.So the hiding feature is strong.The simulation experiments prove the feasibility and the validity of this algorithm.