Title :
A DWT-DCT Based Passive Forensics Method for Copy-Move Attacks
Author :
Wang, Xaiofeng ; Zhang, Xiaoni ; Li, Zhen ; Wang, Shangping
Author_Institution :
Sch. of Sci., Xi´´an Univ. of Technol., Xi´´an, China
Abstract :
A passive forensics method for detecting copy-move attacks was proposed. In the proposed method, tested image was segmented into non-overlapping blocks, DCT and DWT are applied to each image block to extract features, and then compare the statistics of each image block to detection replication regions. Our method was robust to compression up to JPEG quality level 20 and against additive noise. The time complexity of our approach for sorting is O(k 1g k).
Keywords :
computational complexity; computer forensics; data compression; discrete cosine transforms; discrete wavelet transforms; feature extraction; image coding; image segmentation; sorting; DCT; DWT; JPEG quality level; additive noise; attack detection; copy-move attacks; detection replication region; feature extraction; image forensics; image segmentation; passive forensics method; sorting; time complexity; Multimedia communication; Security; Copy-move detection; DCT; DWT; Feature matching; Passive forensics;
Conference_Titel :
Multimedia Information Networking and Security (MINES), 2011 Third International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4577-1795-6
DOI :
10.1109/MINES.2011.98
