失真代价动态更新的自适应彩色图像隐写算法  

Adaptive Color Image Steganography Based on Dynamic Distortion Modification

作　　者：汤光明[1] 姜明明 孙艺 TANG Guangming;JIANG Mingming;SUN Yi(PLA Strategic Support Force Information Engineering University, Zhengzhou 450001, China)

机构地区：[1]解放军战略支援部队信息工程大学,郑州450001

出　　处：《电子与信息学报》2019年第3期656-665,共10页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(61601517);信息保障技术重点实验室开放基金(KJ-15-106)~~

摘　　要：基于灰度图像隐写算法直接应用于彩色图像引起的安全性问题,该文针对彩色分量提出一种动态更新失真代价的空域隐写算法。首先,分析了彩色分量内容特性与通道间相关性的关系,提出中心元素的失真更新准则。随后,考虑到隐写过程中邻域分量嵌入修改产生的交互影响,得到维持邻域相关性的最优修改方式。最后,提出彩色分量的失真代价动态更新策略(CCMS),并应用该策略设计实现了一种彩色图像的空域自适应隐写算法。实验表明,在5种嵌入率下HILL-CCMS,WOW-CCMS算法对彩色隐写特征CRM,SCCRM的抗检测能力明显高于HILL和WOW算法。Considering the possible security problems of directly extending steganographic schemes for grayscale images to color images, an adaptive distortion-updated steganography method is put forward based on the Modification Strategy for Color Components (CCMS). First, the correlation between color components and RGB channels is analyzed, and the principle of distortion cost modification is proposed. Moreover, the optimal modification mode is conducted to maintain the statistical correlation of adjacent components. Finally, color image steganography schemes called CCMS are proposed. The experimental results show that the proposed HILL-CCMS and WOW-CCMS make great improvement over HILL and WOW methods under 5 embedding rates in resisting state-of-the-art color steganalytic methods such as CRM and SCCRM.

关 键 词：信息安全 自适应隐写 失真代价更新 彩色通道相关性 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]