Results 121 to 130 of about 18,128 (154)

Passive forensics for copy-move image forgery using a method based on DCT and SVD

Forensic Science International, 2013
As powerful image editing tools are widely used, the demand for identifying the authenticity of an image is much increased. Copy-move forgery is one of the tampering techniques which are frequently used. Most existing techniques to expose this forgery need to improve the robustness for common post-processing operations and fail to precisely locate the ...
Jichang Guo
exaly   +3 more sources

A passive multi-purpose scheme based on periodicity analysis of CFA artifacts for image forensics

Journal of Visual Communication and Image Representation, 2014
We propose a passive multi-purpose scheme for photographic image (PIM) detection and a device class identification method. The motivation for the scheme is the periodicity phenomenon caused by color filter arrays (CFAs) and the demosaicing process. The phenomenon only occurs in the Fourier spectrum in PIMs. The proposed scheme exploits prediction error
Guo-Shiang Lin
exaly   +2 more sources

A complete passive blind image copy-move forensics scheme based on compound statistics features

Forensic Science International, 2011
Since most sensor pattern noise based image copy-move forensics methods require a known reference sensor pattern noise, it generally results in non-blinded passive forensics, which significantly confines the application circumstances. In view of this, a novel passive-blind image copy-move forensics scheme is proposed in this paper.
Fei Peng, Min Long
exaly   +3 more sources

Passive forensics in image and video using noise features: A review

Digital Investigation, 2016
Sanjay Kumar Singh
exaly   +2 more sources

Passive network forensics

ACM SIGOPS Operating Systems Review, 2008
Passive monitoring of the data entering and leaving an enterprise network can support a number of forensic objectives. We have developed analysis techniques for NetFlow data that use behavioural identification and can confirm individual host roles and behaviours expressed as connection patterns.
John McHugh, Ron McLeod, Vagishwari Nagaonkar   +2 more
openaire   +1 more source

Passive magnetic methods – introduction to forensic research

Issues of Forensic Science, 2016
The article presents passive magnetic methods applied in non-contact diagnostics which can find application in forensic examinations, and in particular can be used within the framework of the project “Passive and active magnetic methods as the basis for a new examination methodology related to detecting, combating and neutralizing terrorist threats and
Krzysztof Borkowski, Krzysztof Ćwik, Krzysztof Biskup   +2 more
openaire   +1 more source

Passive forensics for image splicing based on PCA noise estimation

2015 10th International Conference for Internet Technology and Secured Transactions (ICITST), 2015
In this paper, based on the fact that images from different sources tend to have different noise levels, an effective method for detecting image splicing is proposed by detecting the inconsistency of local noise levels. The local noise level is estimated by a novel blind noise estimation method on the basis of the principal component analysis (PCA). We
Lifei Zhan, Yuesheng Zhu
openaire   +1 more source

An Overview on Passive Image Forensics Technology for Automatic Computer Forgery

International Journal of Digital Crime and Forensics, 2016
Currently, with the popularity of sophisticated image editing tools like Photoshop, it is becoming very difficult to discriminate between an authentic image and its manipulated version, which poses a serious social problem of debasing the credibility of photographic images as definite records of events.
Jie Zhao, Qiuzi Wang, Jichang Guo, Lin Gao, Fusheng Yang   +4 more
openaire   +1 more source

Keypoints-Based Image Passive Forensics Method for Copy-Move Attacks

International Journal of Pattern Recognition and Artificial Intelligence, 2016
A novel image passive forensics method for copy-move forgery detection is proposed. The proposed method combines block matching technology and feature point matching technology, and breaks away from the general framework of the visual feature-based approach that used local visual feature such as SIFT and followed by a clustering procedure to group ...
Xiaofeng Wang, Guanghui He, Chao Tang 0005, Yali Han, Shangping Wang   +4 more
openaire   +1 more source

Passive Detection of Copy-paste Tampering for Digital Image Forensics

2011 Fourth International Conference on Intelligent Computation Technology and Automation, 2011
Copy-paste processing is a frequently used method to tamper an image. For JPEG format is the mostly employed image format, more likely the copied slice came from JPEG image. In this paper, we first introduce two copy-paste tampering Scenarios: one is conducted between JPEG images and saved in a loss less format, the other is also conducted between JPEG
Liu Zhulong, Li Xianghua, Zhao Yuqian
openaire   +1 more source