基于边缘复杂度和插值法的隐写算法

为了在提高隐写容量的同时保持较好的不可感知性, 依据人眼对图像边缘区域变化不敏感的特性, 提出一种新的自适应隐藏算法。该方案完善了图像边缘复杂度的描述方法, 利用边缘检测理论计算出像素的嵌入强度, 然后通过改进的插值法, 根据嵌入强度, 对图像像素进行插值, 构造出插值点与基准点之间的冗余空间, 从而嵌入相应数据量的秘密信息。实验结果表明, 与传统算法相比, 该方法提高了隐写容量并具有较好的隐蔽性。

Steganography using edge complexity and interpolation method

In order to improve the capacity of the hidden secret data and reduce the noticeable distortion, this paper proposed a new data hiding algorithm in accordance with the visual property that human eyes were insensitive to edged area. Firstly, it optimized the method to describe edge complexity, and utilized the edge detection theory to calculate the embedding strength of a given pixel. Then, it adopted a new interpolation method to modify every pixel that the secret data to be embedded according to its embedding strength, and created a big redundant space for hiding. Finally, it embedded secret information according to the scale of the redundant space. Experimental results indicate that the proposed algorithm improves hiding capacity and achieves a good imperceptibility compared with the traditional algorithms.