頁籤選單縮合
題 名 | 以特徵點為基礎的航測影像浮水印=Keypoint-Based Digital Watermarking for Photogrammetric Images |
---|---|
作 者 | 徐百輝; 陳志丞; | 書刊名 | 航測及遙測學刊 |
卷 期 | 17:4 2013.12[民102.12] |
頁 次 | 頁251-266 |
分類號 | 312.1 |
關鍵詞 | 數位浮水印; 強韌性; 幾何轉換; Digital watermarking; Robustness; Geometric transformation; Deformation; |
語 文 | 中文(Chinese) |
中文摘要 | 隨著個人電腦與高速網路的日漸普及,人們可以快速且輕易地搜尋並取得各式各樣的數位資料,如何應用訊號處理技術進行數位資料的版權維護及管理也成為一個熱門的研究議題。目前有關於一般數位多媒體資料的數位浮水印研究已有相當成熟的技術與豐碩的成果,惟對於需高額經費產製、重要性甚高、應用性甚廣之空間資料,其相關的浮水印研究卻相當少見。本研究針對網格式空間資料進行數位浮水印分析及探討,以航空攝影取得之數位影像為例,進行數位浮水印的測試及影響分析,並針對航空影像的主要應用,提出一個以點特徵為基礎的浮水印演算法,進行浮水印的強韌性測試及分析,以因應不同使用者後續處理影像資料後仍能達成版權保護的目的。經實驗證明,本研究所提浮水印方法確實具一定的強韌性,可以抵抗大部分的影像攻擊,同時亦可以保有航測影像資料的品質,嵌入本研究所提方法之浮水印後,影像匹配成功率至少較一般浮水印演算法提高了百分之三。 |
英文摘要 | With the rapid development of information technology (IT) and communication technology (CT),people can obtain every kind of digital data more convenient than before. The consequence is that the “copyright protection” which prevents digital data from been duplicated illegally should be paid much more attention. In the past, digital watermarking technology has been successfully applied to the “copyright protection” of various kinds of digital multimedia data, however the researches and applications of applying digital watermarking to geo-information data are still very inadequate. In this study, the influence of the digital watermarking on the photogrammetric images is firstly analyzed. A novel digital watermarking algorithm based on the keypoints is proposed especially for photogrammetric images. The robustness of the embedded digital watermark and the impact on photogrammetric images are finally evaluated and analyzed. The experiments show that the proposed algorithm has high robustness on watermarking and little influence on the quality of the photogrammetric images. The success rate of image matching has been improved by 3% using the proposed watermarking algorithm. |
本系統中英文摘要資訊取自各篇刊載內容。