- 學位論文
以均衡且不完整性之區塊結構資訊辨識之強健型數位浮水印
Recognition of Structure Information in Balanced Incomplete Block Designs for Robust Watermarking
摘要
近年來，數位媒體在網際網路上被廣泛的使用。而數位媒體的版權也成為越來越重要的議題。數位浮水印技術就是一種可以將數位浮水印嵌入到數位媒體中以保護數位媒體的版權並且達到強健性與不可視的目的。 本篇論文的目標是提出一種以平衡且不完全區塊設計為基礎的數位浮水印辨識方式。在發送端，這種數位浮水印嵌入到經由離散小波轉換的原始影像的中頻區域；接收端則是利用原始影像萃取出數位浮水印並且將這種具有特殊數學結構的數位浮水印辨識出來。實驗結果顯示，若針對這種數位浮水印的特殊數學結構制訂辨識規則，可以有效的提高成功辨識率。
並列摘要
In recent years, digital contents are extensively used over the internet. Digital rights protection has become a serious issue. Digital watermarking is a kind of technique by which digital watermarks can be embedded into digital contents, and this technique may be a good solution to digital rights protection due to its robustness and invisibility. This study aims to present a new watermarking approach based on the balanced incomplete block designs (BIBD). The designed watermark is embedded into median frequency in the wavelet domain of the cover image. At the receiver site, the original image is used to extract the embedded watermark, and the mathematical structure of the BIBD is used to identify the watermark.