二種基於EMD及矩陣編碼方式之資料藏匿演算法

Two Improved Data Hiding Algorithms Respectively Based on the Methods of EMD and Matrix Encoding

詹珮雯(Pei-Wun Jhan)

指導教授 ： 黃育銘

國立暨南國際大學/科技學院/資訊工程學系/碩士(2011年)

https://doi.org/10.6837/NCNU.2011.00236

摘要

所謂資料隱藏(Data Hiding)就是將所要隱藏的資訊嵌入於掩蓋圖，例如一張影像，使得影像不輕易被肉眼察覺到有任何的異常。以失真度與嵌入率來做評估資料隱藏的好或壞。在本論文中我們提出兩種改進資料隱藏方法。一是基於EMD資料隱藏演算法來提高影像品質，二是改善矩陣編碼演算法利用漢明碼+1之概念來提高影像品質。以上兩種提出改進方法經由理論分析以及實驗證實其影像品質確實大幅提升。

關鍵字

EMD ； 矩陣編碼 ； 資料藏匿 ； 漢明碼+1

並列摘要

The meaning of information (data) hiding is to embed the information into a cover host, such as an image. Usually, the naked eye of the people cannot perceive any change when the image is modified slightly. The evaluation of data hiding schemes should be done by the distortion (or called Mean Square Error; MSE) and the embedding rate (the average number of bits embedded in a pixel). In this dissertation, we propose two improved data hiding schemes. One is to improve the EMD (Exploiting Modification Direction)-based data hiding algorithm to have higher image quality. The other is to improve the Matrix encoding-based data hiding algorithm by using the idea of Hamming+1 to further improve the image quality. Both proposed improved schemes are verified to be correct through the theoretical analysis and the experiment.

並列關鍵字

EMD ； Matrix encoding ； Data Hiding ； Hamming+1

參考文獻

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