一种基于二次剩余的JPEG图像信息隐藏算法

An Information Hiding Algorithm of JPEG Images Based on Quadratic Residuals

提出一种基于二次剩余的JPEG图像信息隐藏算法。本算法通过计算最后一个非0DCT系数的二次剩余值,确定秘密信息的嵌入位置,由秘密信息与系数的对应关系,即可实现1比特秘密信息的隐藏。实验结果表明,该算法不仅增强了抵抗攻击的能力,且在不影响图像主客观质量的前提下增大了秘密信息嵌入容量。

JPEG image information hiding algorithm based on quadratic residuals is proposed. The algorithm calculates the embedding position of the secret information by calculating the quadratic residual value of the last non 0 DC coefficient, and the 1 bit secret information can be hidden by the correspondence between the secret information and the coefficients. Experimental results show that the algorithm not only enhances the ability to resist attacks, but also increases the embedded information capacity without affecting the subjective and objective quality of the image.