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Invisible Geo-Location Signature in a Single Image

Abstract: 

Geo-tagging images of interest is increasingly important to law enforcement, national security, and journalism. Many images today do not carry location tags that are trustworthy and resilient to tampering; and the landmark-based visual clues may not be readily present in every image, especially in those taken indoors. In this paper, we exploit an invisible signature from the power grid, the Electric Network Frequency (ENF) signal, which can be inherently recorded in a sensing stream at the time of capturing and carries useful location information. It is, however, very challenging to extract an ENF signal from a single image, as compared to the recent art in extracting ENF traces from audio and video. This paper presents novel investigations toward this challenge, by synergistically exploring the rolling shutter effect of CMOS imaging sensors and entropy differences of composite signals. We study quantitatively the relationship between the ENF strength and its detectability from a single image, and bring out a unique forensics capability of invisible traces that shine a light on an image's capturing location.

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Paper Details

Authors:
Submitted On:
27 April 2018 - 6:28pm
Short Link:
Type:
Presentation Slides
Event:
Presenter's Name:
Chau-Wai Wong
Paper Code:
IFS-L2-2357
Document Year:
2018
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Document Files

ICASSP18_presentation_v2.pdf

(101 downloads)

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[1] , "Invisible Geo-Location Signature in a Single Image", IEEE SigPort, 2018. [Online]. Available: http://sigport.org/3186. Accessed: Nov. 21, 2018.
@article{3186-18,
url = {http://sigport.org/3186},
author = { },
publisher = {IEEE SigPort},
title = {Invisible Geo-Location Signature in a Single Image},
year = {2018} }
TY - EJOUR
T1 - Invisible Geo-Location Signature in a Single Image
AU -
PY - 2018
PB - IEEE SigPort
UR - http://sigport.org/3186
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. (2018). Invisible Geo-Location Signature in a Single Image. IEEE SigPort. http://sigport.org/3186
, 2018. Invisible Geo-Location Signature in a Single Image. Available at: http://sigport.org/3186.
. (2018). "Invisible Geo-Location Signature in a Single Image." Web.
1. . Invisible Geo-Location Signature in a Single Image [Internet]. IEEE SigPort; 2018. Available from : http://sigport.org/3186