计算机工程与应用 ›› 2007, Vol. 43 ›› Issue (15): 47-49.

• 学术探讨 • 上一篇    下一篇

一种基于模糊分类的信息隐藏方法

李庆忠,孙圣滨,褚东升   

  1. 中国海洋大学 工程学院,山东 青岛 266100
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-05-21 发布日期:2007-05-21
  • 通讯作者: 李庆忠

Steganographic method based on fuzzy classification

LI Qing-zhong,SU N Sheng-bin,ZHU Dong-sheng   

  1. College of Engineering,Ocean University of China,Qingdao,Shandong 266100,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2007-05-21 Published:2007-05-21
  • Contact: LI Qing-zhong

摘要: 提出了一种在图像DCT域内的信息隐藏方法。为了在保证隐秘图像视觉质量可以接受的前提下,有效提高载体图像的信息隐藏量,首先根据HVS特征和模糊理论将载体图像的各个DCT子块分为三类,然后根据DCT子块的类型不同,自适应变化嵌入每个DCT系数的秘密信息的位数。实验结果表明:该文方法在图像质量和信息嵌入量方面,都优于DCT域内固定嵌入位数的信息隐藏方法。此外,在秘密信息提取时,该文算法不需要参考原始载体图像,实现了提取信息的盲检测。

关键词: 信息隐藏, DCT, HVS, 模糊分类

Abstract:

This paper presents a novel steganographic method in Discrete Cosine Transform(DCT) domain.In order to improve the embedding capacity of a cover-image while maintaining the stego-image quality acceptable,the DCT blocks of a cover-image are classified into three classes based on Human Visual System(HVS) characteristics and fuzzy theory,and then the number of bits to be embedded in each quantized DCT coefficient of a DCT block is varied with the type of the block.The experimental results show that the proposed method performs better than the fixed-length Least-Significant-Bits(LSBs) substitution method in DCT domain in terms of message capacity and image quality.Besides,the embedding data can be extracted from the stego-image without referencing to the original cover-image.

Key words: Steganography, Discrete Cosine Transform(DCT), Human Visual System(HVS), fuzzy classification