【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 ,这种方法能大量的减少高频噪声的引入更多还原

【Abstract】 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.更多还原