Please use this identifier to cite or link to this item: http://rportal.lib.ntnu.edu.tw:80/handle/20.500.12235/99192
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dc.contributor莊謙本zh_TW
dc.contributorChien-Pen Chuangen_US
dc.contributor.author藍品淳zh_TW
dc.contributor.authorPin-Chun Lanen_US
dc.date.accessioned2019-09-04T02:48:05Z-
dc.date.available2016-8-23
dc.date.available2019-09-04T02:48:05Z-
dc.date.issued2011
dc.identifierGN0698700262
dc.identifier.urihttp://etds.lib.ntnu.edu.tw/cgi-bin/gs32/gsweb.cgi?o=dstdcdr&s=%22http://etds.lib.ntnu.edu.tw/cgi-bin/gs32/gsweb.cgi?o=dstdcdr&s=id=%22GN0698700262%22.&%22.id.&
dc.identifier.urihttp://rportal.lib.ntnu.edu.tw:80/handle/20.500.12235/99192-
dc.description.abstract本篇論文針對數位影像設計一個具有強韌性質的數位浮水印技術,目的是為了保護數位影像的智慧財產權。一般而言,對於浮水印影像的攻擊可分成幾何攻擊與非幾何攻擊兩大類,一個良好的強韌型數位浮水印演算法要能承受上述的攻擊。然而,在大部分抵抗幾何攻擊的研究中,有著浮水印嵌入容量受到限制的問題,有鑑於此,本篇論文使用尺度特徵不變技術來抵抗幾何攻擊,並且藉由二維條碼本身的高容量和高容錯特性,提升浮水印容量。結合離散小波與離散餘弦的混合轉換,並加入雜訊可見函式的考量,可以改善浮水印影像的視覺透明度。由數個實驗結果來展示演算法的效能,測試的攻擊模式有影像壓縮、縮放、模糊、銳化、對比以及亮度等攻擊,並與另一現存的浮水印演算法做比較,可以擁有較高的影像品質與攻擊抵抗能力。本篇論文的浮水印演算法能有效地兼顧強韌度與視覺透明度,進一步達到保護數位影像的智慧財產權之目的。zh_TW
dc.description.abstractThis thesis focuses on the study of robust watermarking techniques to protect the intellectual property rights for digital images. In general, watermark attacks can be divided into two classes: geometric attacks and non-geometric attacks. A robust digital watermark algorithm can resist the above attacks. Recently, most of the researches focus on resisting geometric attacks with watermarking techniques but it’s not recommended due to the restricted watermark embedding capacity. To resolve the above problem, this thesis proposes a watermark algorithm based on scale-invariant feature transform. The improvement of watermark embedding capacity depends on two-dimension barcode’s storage of high capacity of information, error-correction ability. The watermark algorithm uses a combination of the discrete wavelet transform, the discrete cosine transform and noise visibility function to improve the perceptual transparency. The experimental results demonstrate the performance of the proposed scheme. The watermark attacks uses in the experiments include image compression, resize, blurring, sharpening, contrast and brightness. Finally, the experimental results show the performance of this scheme to be superior to that of an existing one.en_US
dc.description.sponsorship工業教育學系zh_TW
dc.language中文
dc.subject尺度不變特徵技術zh_TW
dc.subject離散小波轉換zh_TW
dc.subject離散餘弦轉換zh_TW
dc.subject雜訊可見函式zh_TW
dc.subjectscale-invariant feature transformen_US
dc.subjectdiscrete wavelet transformen_US
dc.subjectdiscrete cosine transformen_US
dc.subjectnoise visibility functionen_US
dc.title一種利用混合轉換之強韌型數位影像浮水印技術zh_TW
dc.titleA Study on Mixed Transform Technology for Robust Digital Watermark of Digital Imageen_US
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