一种基于LBP的纹理合成无载体信息隐藏方法

为了提高无载体隐写算法的嵌入容量和抗干扰能力,提出了一种基于LBP码的纹理合成信息隐藏方法。该方法首先选择原始小尺寸纹理图像,分割生成均匀的像素块并计算块内每个像素的LBP值,取分布最多的LBP值作为该图像块的代表信息。隐藏秘密信息时,首先用指定密钥生成伪随机序列确定白纸上放置纹理候选块的位置,然后根据秘密信息的值选择候选块,放置到白纸指定的位置,其余空白位置则使用纹理合成方法填充。提取信息时,根据密钥生成的伪随机序列得到含密信息块位置,计算每一图像块的LBP值,取分布最多的LBP值作为该图像块包含的信息,从而得到秘密信息。实验结果表明,该方法生成的含密图像具有良好的视觉效果,而且在嵌入容量和抗干扰能力方面有了进一步提高。

A texture synthesis coverless information hiding method based on LBP

In order to improve the embedded capacity and anti-interference capability of the coverless steganography algorithm, this paper proposes a texture synthesis information hiding scheme based on LBP texture analysis. Firstly, the original small-size texture image is selected and divided into uniform pixel blocks, the LBP value of each pixel in the image blocks is calculated, and the LBP value with the largest LBP distribution is taken as the representive information of the image block. Secondly, when hiding the secret information, the pseudo-random sequence is generated with a specified key to determine the position of the texture candidate block placed on the white paper, then the candidate block is selected according to the value of the secret information and placed on the designated position on the white paper, and the remaining blank areas are filled by the texture synthesis method. Inversely, when extracting secret information, the position of the steganography image block is obtained according to the pseudo-random sequence generated by the key, then the LBP value of each image block with the largest distribution is calculated to obtain the secret information. Experimental results show that the steganography image generated by this method has good visual effect and further improves the embedded capacity and anti-interference ability.