TY - JOUR
T1 - Eavesdropping of display devices by measurement of polarized reflected light
AU - Ding, Yitian
AU - Kerviche, Ronan
AU - Ashok, Amit
AU - Pau, Stanley
N1 - Funding Information:
Funding. National Science Foundation (NSF) (1607358); Defense Advanced Research Projects Agency (DARPA) Revolutionary Enhancement of Visibility by Exploiting Active Light-fields (REVEAL HR0011-16-C-0026).
Funding Information:
National Science Foundation (NSF) (1607358); Defense Advanced Research Projects Agency (DARPA) Revolutionary Enhancement of Visibility by Exploiting Active Light-fields (REVEAL HR0011-16-C-0026). Y. D. thanks Dr. Bofan Song for discussions on image processing and Dr. Ori Katz for suggesting the experiment.
PY - 2018/7/1
Y1 - 2018/7/1
N2 - Display devices, or displays, such as those utilized extensively in cell phones, computer monitors, televisions, instrument panels, and electronic signs, are polarized light sources. Most displays are designed for direct viewing by human eyes, but polarization imaging of reflected light from a display can also provide valuable information. These indirect (reflected/scattered) photons, which are often not in direct field-of-view and mixed with photons from the ambient light, can be extracted to infer information about the content on the display devices. In this work, we apply Stokes algebra and Mueller calculus with the edge overlap technique to the problem of extracting indirect photons reflected/scattered from displays. Our method applies to recovering information from linearly and elliptically polarized displays that are reflected by transmissive surfaces, such as glass, and semi-diffuse opaque surfaces, such as marble tiles and wood furniture. The technique can further be improved by applying Wiener filtering.
AB - Display devices, or displays, such as those utilized extensively in cell phones, computer monitors, televisions, instrument panels, and electronic signs, are polarized light sources. Most displays are designed for direct viewing by human eyes, but polarization imaging of reflected light from a display can also provide valuable information. These indirect (reflected/scattered) photons, which are often not in direct field-of-view and mixed with photons from the ambient light, can be extracted to infer information about the content on the display devices. In this work, we apply Stokes algebra and Mueller calculus with the edge overlap technique to the problem of extracting indirect photons reflected/scattered from displays. Our method applies to recovering information from linearly and elliptically polarized displays that are reflected by transmissive surfaces, such as glass, and semi-diffuse opaque surfaces, such as marble tiles and wood furniture. The technique can further be improved by applying Wiener filtering.
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U2 - 10.1364/AO.57.005483
DO - 10.1364/AO.57.005483
M3 - Article
C2 - 30117844
AN - SCOPUS:85049230015
VL - 57
SP - 5483
EP - 5491
JO - Applied Optics
JF - Applied Optics
SN - 1559-128X
IS - 19
ER -