一种基于DCT系数的图像隐藏方法  

A Method of Steganography Based on DCT Coefficient

作　　者：詹玲超[1] 黄继风[1] 姜林美[1] 

机构地区：[1]上海师范大学数理信息学院计算机系,上海200234

出　　处：《计算机技术与发展》2006年第10期39-41,共3页Computer Technology and Development

摘　　要：近年来,随着网络和多媒体技术的快速发展,信息隐藏技术已经成为信息安全领域的一个研究热点。由于JPEG压缩方案中量化是损失信号的主要原因,所以可以在量化后的DCT系数中隐藏信息。文中提出了一种利用对JPEG压缩中的DCT系数进行处理的隐藏图像的方法,将待隐藏图像量化后的DCT系数转化成绝对值小于5的个位数,并将其隐藏在原始图像的量化后的DCT系数中。实验证明该方法能得到不错的隐藏效果,且对原始图像的影响很小。With the rapid development of network and multimedia technologies in recent years, information hiding has been a research hotspot in the area of information security. For quantization is the main source of information loss in JEPG compression scheme, can hide information in the quantized DCT coefficient. Introduces a method of steganography based on DCT coefficient of JPEG conapr~,：~sion. It turns the absolute value of the quantized DCT coefficient of an image into less than 5, then add them into the quantized DCT coefficient of an original image. It has been proved to have good effect and has little influence on the original image.

关 键 词：JPEG压缩 DCT系数 图像隐藏 

分 类 号：TN911.73[电子电信—通信与信息系统]