An Image Steganography Algorithm Based on Pixel Block Difference and Variable Modulus Function

According to pixels out of bounds and the serious distortion caused by too much pixel value modification in traditional PVD steganography, This paper proposes a steganography algorithm based on pixel block difference and variable modulus function (PVBD). The algorithm uses the modular function of dynamic parameters to optimize the amplitude of the pixel value modification, and at the same time the related parameters of the mode function are dynamically variable, which increases the security of the algorithm on the basis of the diversity of the embedded modes. Experiments show that the algorithm this paper proposed has better performance in the embedded capacity and digital image quality as well as other properties than the existing PVD algorithm.