Research On Adaptive Image Information Hiding Scheme Based On Random Matrix

There is vivid research on securely deliver a secret message by using a data hiding technique in digital images.Different from cryptography,which requires secret information to be encrypted,this technology usually protects secret information by hiding it into standard images.Because the stego-images are mixed with numerous social images on the Internet,it is hard to attract the attention of the attackers.The most concerning performance indicators of steganography are embedding capacity and stego-image quality.Traditional steganography schemes usually lack flexibility or having the problem of the low quality of stego-image.In recent years,to achieve higher steganography capacity and quality of stego-image has become a hot research topic.In order to improve stego-image quality and steganography efficiency,this thesis redesigns the hidden manner of secret information.It proposes an efficient information hiding scheme based on a random matrix.The scheme uses a random matrix as the reference matrix to hid secret information,making better quality and higher efficiency of steganography image.The scheme can realize hiding 1.5 bits secret information in per pixel and maintain the steganography image quality of 49.95 db PSNR.It improves steganography efficiency by reducing the steganography set.For adapting to different steganographic requirements and improving the embedding capacity,the thesis also proposes an adaptive large-capacity information hiding scheme based on a random matrix.This scheme designs a method to extend a random matrix,which can make this scheme generate the corresponding extended random matrix for different requirements of steganographic capacity.Therefore,this scheme can achieve the corresponding secret information steganography.Abundant experimental comparison analyses show that this scheme can realize secret information hidden for different steganography capacity requirements.Moreover,it can improve the quality of steganography images under the same steganography capacity.The thesis describes the two image information hidden schemes in terms of the design theory and steganographic process.It analyzes steganography efficiency,steganography image quality,steganography capacity,and security through simulation experiments.Experimental results show that,compared with the previous schemes,the two schemes have some advantages in terms of steganography capacity and steganography image quality.