基于量化器优化的JPEG信息隐藏算法  

Data Hiding Algorithm Based on Optimized Quantizer in JPEG

作　　者：古力[1] 隋永新[1] 郭景富[1] 杨怀江[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所

出　　处：《长春理工大学学报（自然科学版）》2004年第2期104-106,109,共4页Journal of Changchun University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金 (No .60 1780 18)资助项目

摘　　要：在以保密通信为应用背景的信息隐藏算法中 ,如何在JPEG文件隐藏大量的信息是一个较有挑战性的问题。本文对在JPEG文件中的高频区隐藏信息的算法进行了介绍分析。并针对该算法在隐藏信息量较大时 ,载体图像的视觉质量下降较大的缺点 ,提出了一种基于量化器优化设计的信息隐藏算法。该算法通过量化器的优化设计来抑制嵌入信息时引入的高频噪声 ,从而达到改善载体图像视觉质量的目的。实验结果证明 。In data hiding algorithm that faced to conceal communication application, it is a difficult problem that much information is hided in a JPEG file. In this article,we introduced the data hiding algorithm in the high frequency region of JPEG files. Because this algorithm had a shortcoming that the carrier image had perceptible degrade when hidden data was much. A data hiding algorithm based on optimized quantizer in JPEG was proposed. This algorithm restricted the high-frequency noise by optimizing quantizer and improved visual quality of the carrier image. Experimental results show that this algorithm can reduce the high-frequency noise very much.

关 键 词：保密通信 信息隐藏 量化器 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]