计算机系统应用
計算機繫統應用
계산궤계통응용
APPLICATIONS OF THE COMPUTER SYSTEMS
2013年
12期
108-112
,共5页
图像盲取证%小波矩%图像复制粘贴篡改%活动轮廓模型%余弦相关性测度
圖像盲取證%小波矩%圖像複製粘貼篡改%活動輪廓模型%餘絃相關性測度
도상맹취증%소파구%도상복제점첩찬개%활동륜곽모형%여현상관성측도
blind image forensics%wavelet moment%image copy-move tampering%active contour model%cosine correlation measure
图像的局部复制粘贴篡改技术，是最常见的一种图像伪造方式，对此提出一种基于小波矩的图像复制粘贴篡改检测算法。首先通过变分水平集活动轮廓模型初步确定图像篡改的可疑区域；然后对每一块可疑区域利用小波矩算法提取其小波矩特征；接着利用余弦相关性测度判别可疑区域的相似性；最后定位图像的篡改区域。实验结果表明本算法能够有效提取可疑区域，并进一步定位篡改区域。此外，算法对图像前景篡改区域的平移、旋转和缩放具有较强的鲁棒性。
圖像的跼部複製粘貼篡改技術，是最常見的一種圖像偽造方式，對此提齣一種基于小波矩的圖像複製粘貼篡改檢測算法。首先通過變分水平集活動輪廓模型初步確定圖像篡改的可疑區域；然後對每一塊可疑區域利用小波矩算法提取其小波矩特徵；接著利用餘絃相關性測度判彆可疑區域的相似性；最後定位圖像的篡改區域。實驗結果錶明本算法能夠有效提取可疑區域，併進一步定位篡改區域。此外，算法對圖像前景篡改區域的平移、鏇轉和縮放具有較彊的魯棒性。
도상적국부복제점첩찬개기술，시최상견적일충도상위조방식，대차제출일충기우소파구적도상복제점첩찬개검측산법。수선통과변분수평집활동륜곽모형초보학정도상찬개적가의구역；연후대매일괴가의구역이용소파구산법제취기소파구특정；접착이용여현상관성측도판별가의구역적상사성；최후정위도상적찬개구역。실험결과표명본산법능구유효제취가의구역，병진일보정위찬개구역。차외，산법대도상전경찬개구역적평이、선전화축방구유교강적로봉성。
The regional copy-move tampering for a digital image is one of the most common forgery methods. This paper proposes a detection algorithm based on wavelet moment to detect the location of image copy-move tampering. Firstly, we tentatively figure out the suspicious tampered areas in an image by the active contour model based on variational level sets. Secondly, the wavelet moment algorithm is employed to extract wavelet moment features from all suspicious areas. Finally, the real tampered areas are located by using cosine correlation measure to judge the similarity of those suspicious tampered areas. The experiment demonstrates the effectiveness of above mentioned algorithm and its good robustness to the operations of translation, rotation and scale for foreground tampered areas.
