计算机时代
計算機時代
계산궤시대
COMPUTER ERA
2015年
9期
12-13,16
,共3页
压缩图像%图像取证%反取证技术%量化效应%检测性能
壓縮圖像%圖像取證%反取證技術%量化效應%檢測性能
압축도상%도상취증%반취증기술%양화효응%검측성능
compressed image%image forensics%anti-forensics%quantization artifacts%detection performance
图像处理软件的广泛使用使数字图像的篡改和伪造变得更加容易，这给图像数据的安全性带来严重影响。数字图像取证是解决这个问题的关键技术，逐渐成为研究热点。反取证技术能够有效降低或消除取证技术的检测效果，尚没有得到应有的重视。提出一种针对JEPG压缩的反取证技术，通过在压缩图像的DCT系数中添加适当的噪声移除量化块效应，从而去除图像取证的检测证据。实验结果表明，所提出的方法能够明显降低JEPG图像取证方法的检测性能。
圖像處理軟件的廣汎使用使數字圖像的篡改和偽造變得更加容易，這給圖像數據的安全性帶來嚴重影響。數字圖像取證是解決這箇問題的關鍵技術，逐漸成為研究熱點。反取證技術能夠有效降低或消除取證技術的檢測效果，尚沒有得到應有的重視。提齣一種針對JEPG壓縮的反取證技術，通過在壓縮圖像的DCT繫數中添加適噹的譟聲移除量化塊效應，從而去除圖像取證的檢測證據。實驗結果錶明，所提齣的方法能夠明顯降低JEPG圖像取證方法的檢測性能。
도상처리연건적엄범사용사수자도상적찬개화위조변득경가용역，저급도상수거적안전성대래엄중영향。수자도상취증시해결저개문제적관건기술，축점성위연구열점。반취증기술능구유효강저혹소제취증기술적검측효과，상몰유득도응유적중시。제출일충침대JEPG압축적반취증기술，통과재압축도상적DCT계수중첨가괄당적조성이제양화괴효응，종이거제도상취증적검측증거。실험결과표명，소제출적방법능구명현강저JEPG도상취증방법적검측성능。
The widespread use of image processing software makes it easy to tamper and counterfeit a digital image, which will lead to serious influence to the security of image data. The digital image forensics is the key technology to solve the problem and is gradually becoming the research focus. Anti-forensics technology can effectively reduce or eliminate the detection effect of the forensics, but it has not been paid due attention. In this paper, an anti-forensics technology is proposed for JEPG compression, which removes the quantization blocking artifacts by adding appropriate noise to the DCT coefficients in a compressed image, so as to eliminate forensic detection evidence of the image. The experimental results show that the proposed method can significantly reduce the detection performance of the JEPG image forensics.
