41 citations · 110 across the 4 of their papers we have counts for
5 papers
Fusion of Camera Model and Source Device Specific Forensic Methods for Improved Tamper Detection
Ahmet Gökhan Poyraz, Ahmet Emir Dirik, Ahmet Karaküçük +1
PRNU based camera recognition method is widely studied in the image forensic literature. In recent years, CNN based camera model recognition methods have been developed. These two…
PRNU Based Source Camera Attribution for Image Sets Anonymized with Patch-Match Algorithm
Ahmet Karaküçük, Ahmet Emir Dirik
Patch-Match is an efficient algorithm used for structural image editing and available as a tool on popular commercial photo-editing software. The tool allows users to insert or rem…
PRNU-Based Source Device Attribution for YouTube Videos
Emmanuel Kiegaing Kouokam, Ahmet Emir Dirik
Photo Response Non-Uniformity (PRNU) is a camera imaging sensor imperfection which has earned a great interest for source device attribution of digital videos. A majority of recent…
Analysis of Rolling Shutter Effect on ENF based Video Forensics
Saffet Vatansever, Ahmet Emir Dirik, Nasir Memon
ENF is a time-varying signal of the frequency of mains electricity in a power grid. It continuously fluctuates around a nominal value (50/60 Hz) due to changes in supply and demand…
Detecting the Presence of ENF Signal in Digital Videos: a Superpixel based Approach
Saffet Vatansever, Ahmet Emir Dirik, Nasir Memon
ENF (Electrical Network Frequency) instantaneously fluctuates around its nominal value (50/60 Hz) due to a continuous disparity between generated power and consumed power. Conseque…