基于轮廓绘制及填色的构造式信息隐藏算法

Constructive information hiding algorithm based on contour drawing and color filling

基于元素映射的构造式信息隐藏算法存在因图案库泄露而导致的安全性问题,鉴于此,提出了一种新的通过含密轮廓绘制及颜色填充生成平铺图像的构造式信息隐藏算法。运用B样条曲线为多个图案轮廓建立标准结构化表示,并创建收发双方共享的标准结构化表示库和颜色库,根据秘密信息进行标准结构化表示选取、图案轮廓绘制及颜色填充操作,获得含密图案。多个离散分布的含密图案共同构成一幅含密平铺图像。实验证明,该算法对JPEG压缩、中值滤波、高斯滤波等常见图像攻击具有较强的鲁棒性,且与类似算法相比,能够抵抗更多种图像攻击。

The constructive information hiding algorithm based on element mapping faces security concerns due to the pattern library leakage.Based on this issue,a novel constructive information hiding algorithm was proposed,which generated tiled images through covert contour drawing and color filling to enhance security.B-spline curves were utilized to establish standard structured representations for multiple pattern contours and shared standardized structured representation libraries and color libraries were created for both the sender and receiver.Selection of standardized structured representations,pattern outline drawing,and color filling operations were performed based on secret information to obtain covert patterns.Multiple discretely distributed covert patterns collectively formed a covert tiled image.Our experiments demonstrated that this algorithm had strong robustness against common image attacks such as JPEG compression,median filtering,and Gaussian filtering.Furthermore,our algorithm can withstand more types of image attacks compared to similar algorithms.