English  |  正體中文  |  简体中文  |  全文笔数/总笔数 : 57480/91031 (63%)
造访人次 : 13416891      在线人数 : 234
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
搜寻范围 查询小技巧:
  • 您可在西文检索词汇前后加上"双引号",以获取较精准的检索结果
  • 若欲以作者姓名搜寻,建议至进阶搜寻限定作者字段,可获得较完整数据
  • 进阶搜寻

    jsp.display-item.identifier=請使用永久網址來引用或連結此文件: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/53761

    题名: Fast copy-move forgery detection
    作者: Lin, Hwei-Jen;Wang, Chun-Wen;Kao, Yang-Ta
    贡献者: 淡江大學資訊工程學系
    关键词: Forgery Detection;Copy-move Forgery;Singular Value Decomposition (SVD);Principal Component Analysis (PCA);Lexicographical Sort;Scale Invariant Feature Transform (SIFT) Descriptors;Log-polar Coordinates;Radix Sort;Connected Component Analysis
    日期: 2009-05
    上传时间: 2011-05-20 09:59:00 (UTC+8)
    出版者: Wisconsin: World Scientific and Engineering Academy and Society
    摘要: This paper proposes a method for detecting copy-move forgery over images tampered by copy-move. To detect such forgeries, the given image is divided into overlapping blocks of equal size, feature for each block is then extracted and represented as a vector, all the extracted feature vectors are then sorted using the radix sort. The difference (shift vector) of the positions of every pair of adjacent feature vectors in the sorting list is computed. The accumulated number of each of the shift vectors is evaluated. A large accumulated number is considered as possible presence of a duplicated region, and thus all the feature vectors corresponding to the shift vectors with large accumulated numbers are detected, whose corresponding blocks are then marked to form a tentative detected result. Finally, the medium filtering and connected component analysis are performed on the tentative detected result to obtain the final result. Compared with other methods, employing the radix sort makes the detection much more efficient without degradation of detection quality.
    關聯: WSEAS Transactions on Signal Processing 5(5), pp.188-197
    显示于类别:[資訊工程學系暨研究所] 期刊論文


    档案 大小格式浏览次数
    1790-5022 _5(5)_p188-197.pdf1637KbAdobe PDF2检视/开启



    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - 回馈