使用改良直方圖位移技術之可逆式區塊截短編碼資料隱藏技術

A New Histogram Shifting Based Reversible Data Hiding Scheme Implemented on Block Truncation Coding of Image

陳宏祥(Hung-Shiang Chen)

指導教授 ： 謝仕杰

國立虎尾科技大學/電機資訊學院/資訊工程研究所/碩士(2014年)

https://doi.org/10.6827/NFU.2014.00005

摘要

資料隱藏是一種避免機密資訊於傳輸時被竊取的一種技術。利用人類肉眼無法觀測的像素變化來嵌入機密資訊，使機密資料不易被發現。因此，在嵌入機密資訊後的偽裝影像品質就顯得相當重要。本論文提出一種使用改良直方圖位移技術之可逆式區塊截短編碼(Block Truncation Coding, BTC)資料隱藏技術。運用直方圖與最小位移技術的原理，本論文提出的方法不但具有可逆性還能維持良好的影像品質。除此之外，本論文還提出一種針對直方圖位移後，當低值點(Low Points)需要額外紀錄時的壓縮方法，此壓縮方法可以使純負載量(Pure Payload)有效的提高。實驗結果顯示提出的方法具有不錯的資料藏入量與視覺品質良好的重建影像。

關鍵字

區塊截短編碼 ； 直方圖 ； 資料隱藏 ； 最小位移技術

並列摘要

Data hiding technique is a kind of secret communication technology. When secret information data embed in mark image, visual quality will be very important. Use of digital images to embed secret data makes use of the weaknesses in the human visual system. Change some pixels to embed secret data in images. In this dissertation, we proposed a new histogram shifting based reversible data hiding scheme implemented on block truncation codes of Images. Use histogram shifting technique and least shifting idea is can be reversible. In addition, this dissertation also proposed a compression method against histogram shifting. When Low point need bookkeeping information, This compression method can increase the pure payload. However, the experimental result shows not only have high capacity, but also can get good image quality.

並列關鍵字

data hiding ； block truncation coding ； histogram shifting ； least shifting

參考文獻

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