Research On Steganalysis Of Color Image Based On Modulus Computation

With the rapid development of network applications,people pay more and more attention to network information security,and information steganography has become a research hotspot of scholars.At present,the research on information steganography is mainly based on grayscale images,but the research results of color images are not enough.Most of the images used in life are color images,so the research of information steganography in color images is imminent.In this paper,the following research has been made in this paper to solve the problem that the embedded capacity of some algorithms is not large enough,the image quality is poor,the visual quality of the image and the embedding rate can not be balanced.In order to solve the problem that the image quality and embedded capacity can not be balanced in the color image information hiding algorithm,a large capacity color image steganography algorithm is proposed based on modular operation in this paper.The algorithm introduces a new steganography function,and combines the characteristics of the RGB three channel to calculate the appropriate steganography coefficient.Through the difference between the original information carried by the image and the secret information,the modified amount is determined,and then the information steganography is realized.In this algorithm,the secret information is embedded in the form of a number.On the one hand,the security of the secret information is improved.On the other hand,the embedding rate of the unit pixels can be improved.A large number of experiments have proved that the PSNR value of the dense image generated by the algorithm is still very high when it is embedded in large capacity,and it has excellent image quality.In order to further improve the embedding rate of color image steganography algorithm,an improved algorithm is proposed based on steganography coefficient in this paper.The implicit writing coefficient in the implicit write function is further discussed by combining the complementary properties of the modular operation,and a more suitable method for large capacity embedding is proposed,and the embedded information is changed accordingly.On condition that the image quality of dense image is good,the improved algorithm can provide larger embeddingcapacity.At the same time,when the embedded information is small,the improved algorithm can reduce the amount of image modification and improve the visual quality of the image.In view of the narrow application range of color image information cryptographic technology and the serious disclosure of personal information in network communication,this paper proposes a steganography algorithm for the characteristics of daily network communication based on the edge random embedding of color images.According to the pseudorandom number,the algorithm determines the location of the embedded information,and uses the edge detection method to check the location.Only the edge location of the specific conditions can be embedded into the information.When the information is embedded,the algorithm combines the eight pixels around the location to calculate the value of the point.Then the pixel value of the original image is determined by the pixels of the embedded position and the sum of the secret information.At last,a simple and practical software is developed according to the algorithm.It is found that the algorithm has faster rate and higher security when embedding information.It can meet the requirements of daily network communication.