ANALYSIS Forum (IPACO) Forum Index

ANALYSIS Forum (IPACO)
Dedicated to the analysis of alleged UFO photos and videos

 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Determining Digital Image Origin Using Sensor Imperfections

 
Post new topic   Reply to topic    ANALYSIS Forum (IPACO) Forum Index -> Analysis: technical subjects -> Articles and publications
Previous topic :: Next topic  
Author Message
elevenaugust
Administrator
Administrator

Offline

Joined: 20 Jun 2012
Posts: 67

PostPosted: 06/27/2012, 05:32 pm    Post subject: Determining Digital Image Origin Using Sensor Imperfections Reply with quote

ABSTRACT

"In this paper, we demonstrate that it is possible to use the sensor’s pattern noise for digital camera identification from images. The pattern noise is extracted from the images using a wavelet-based de-noising filter. For each camera under investigation, we first determine its reference pattern, which serves as a unique identification fingerprint.

This could be done using the process of flat-fielding, if we have the camera in possession, or by averaging the noise obtained from multiple images, which is the option taken in this paper.
To identify the camera from a given image, we consider the reference pattern noise as a high-frequency spread spectrum watermark, whose presence in the image is established using a correlation detector. Using this approach, we were able to identify the correct camera out of 9 cameras without a single misclassification for several thousand images.

Furthermore, it is possible to perform reliable identification even from images that underwent subsequent JPEG compression and/or resizing. These claims are supported by experiments on 9 different cameras including two cameras of exactly the same model.
"

Jan Lukáš, Jessica Fridrich, and Miroslav Goljan
Department of Electrical and Computer Engineering
SUNY Binghamton, Binghamton, NY 13902-6000


Read and download the whole article here

    


Back to top
Publicité






PostPosted: 06/27/2012, 05:32 pm    Post subject: Publicité

PublicitéSupprimer les publicités ?
Back to top
Display posts from previous:   
Post new topic   Reply to topic    ANALYSIS Forum (IPACO) Forum Index -> Analysis: technical subjects -> Articles and publications All times are GMT + 2 Hours
Page 1 of 1

 
Jump to:  

Index | Create free forum | Free support forum | Free forums directory | Report a violation | Conditions générales d'utilisation
Powered by phpBB © 2001, 2005 phpBB Group