一种空域频域结合的图像隐写算法  

A Image Steganography Algorithm in Combination of Spatial and Frequency Domains

作　　者：张家骥[1] 郭立[1] 王昱洁[1] 

机构地区：[1]中国科学技术大学电子科学与技术系,安徽合肥230026

出　　处：《信息安全与通信保密》2011年第7期82-84,89,共4页Information Security and Communications Privacy

基　　金：国家自然科学基金资助项目(批准号:61071173)

摘　　要：为了获取较大隐写容量和较好的不可感知性,使用图像空域边缘特点结合人眼视觉感知特性,提出一种空域频域相结合的大容量图像隐写算法,既考虑了图像在空域中的边缘信息,又考虑了图像亮度等因素对嵌入区域的影响。使用对比灵敏度和纹理能量对嵌入区域进行整合,根据容量大小和不可感知程度来选择频域或空域对图像嵌入秘密信息。通过实验表明,该算法在得到了较大的隐写容量的同时也获得了较好的不可感知性。A novel image steganography algorithm in combination of spatial and frequency domains is proposed. In this algorithm,both the edge property of the entire image and other factors such as luminance of the image are considered. In accordance with the multi-parameter spatial contrast sensitivity function,contrast masking based on classification of DCT blocks,and the edge property of the image,different areas are chosen for embedding the secret information in spatial or frequency domains. Experimental results show that the algorithm could achieve a capacity promotion without noticeable distortion.

关 键 词：视觉感知模型 隐写 隐写容量 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]