Authors:
P. Chippendale
1
;
M. Zanin
1
and
M. Dalla Mura
2
Affiliations:
1
Fondazione Bruno Kessler, Italy
;
2
Grenoble Institute of Technology, France
Keyword(s):
Media Forensics, Visual Authentication, 3D Terrain-model Registration, Augmented Reality, Machine Vision, Geo-informatics.
Related
Ontology
Subjects/Areas/Topics:
Applications
;
Applications and Services
;
Computer Vision, Visualization and Computer Graphics
;
Entertainment Imaging Applications
;
Multimedia Forensics
;
Pattern Recognition
;
Robotics
;
Software Engineering
Abstract:
In this paper, we explore the topic of geo-tagged photo authentication and introduce a novel forensic tool created to semi-automate the process. We will demonstrate how a photo’s location and time can be corroborated through the correlation of geo-modellable features to embedded visual content. Unlike previous approaches, a machine-vision processing engine iteratively guides users through the photo registration process, building upon available meta-data evidence. By integrating state-of-the-art visual-feature to 3D-model correlation algorithms, camera intrinsic and extrinsic calibration parameters can also be derived in an automatic or semi-supervised interactive manner. Experimental results, considering forensic scenarios, demonstrate the validity of the system introduced.