Remote detection of buried land-mines and IEDs using LWIR polarimetric imaging

Gurton, Kristan P.; Felton, Melvin

doi:10.1364/oe.20.022344

Cited by 26 publications

(15 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…15) and even providing age estimations of blood stains (see 16). Originally adopted for military use in the 1950s, thermal detection has been utilised for the detection of landmines (17) and Improvised Explosive Devices (IEDs) (18). In forensics thermal imaging is commonly used to detect fleeing fugitives and heat by-products of illegal cannabis operations (19), and even facial analysis to detect intoxication (20).…”

Section: Introductionmentioning

confidence: 99%

Preliminary hand-held thermal imaging results of sequential monitoring of a simulated deceased individual on terrestrial ground

Wisniewski¹,

Pringle²,

Heaton³

2020

Preprint

View full text Add to dashboard Cite

Thermal imaging is commonly used by forensic search investigators to locate missing persons, but there is little research on it’s actual effectiveness to detect individuals after death. This paper aims to answer fundamental questions on how long thermal imaging is effective to detect a body lying on the surface and when is the optimal time in a day to survey. A simulated murder victim, using a freshly dispatched pig (Sus scrofa) carcass, was left on the soil surface of a test site and imaged three times a day over a 61-day study period. Images were quantitatively analysed to determine what the relative thermal response the cadaver had with respect to background values, with results corrected for daily temperature (ADD) and decomposition rate (TBS scores). Results evidenced the surface cadaver could be detectable throughout the 61 day study period, but there were differences depending on when the survey was conducted during the day. Morning surveys were found to be optimal up to 10 days PMI (0-90 ADD), evening/dusk surveys optimal from 10 to 40 days PMI (90-400 ADD), midday surveys optimal from 40 to 50 days PMI (400-530 ADD) and then evening surveys to the end of the 61-day (400-680 ADD) study period. Implications suggest that thermal imaging is recommended to detect missing persons even after death and surveys should be undertaken at specific time periods during the day to improve search detection success if PMI can be estimated.

show abstract

Section: Introductionmentioning

confidence: 99%

Preliminary hand-held thermal imaging results of sequential monitoring of a simulated deceased individual on terrestrial ground

Wisniewski¹,

Pringle²,

Heaton³

2020

Preprint

View full text Add to dashboard Cite

show abstract

“…There has been growing interest among researchers investigating polarization-based thermal imaging techniques in which information inherent in the image forming radiance is retained and displayed as a 2D image, i.e., thermal polarimetric imaging [1][2][3][4][5]. It is known that both manmade and naturally occurring materials/objects emit radiation in the thermal IR that exhibits a preferential linear polarization state that is orthogonal to reflection-induced polarization [6].…”

Section: Introductionmentioning

confidence: 99%

LWIR polarimetry for enhanced facial recognition in thermal imagery

2014

Self Cite

View full text Add to dashboard Cite

We present a series of long-wave-infrared (LWIR) polarimetric-based thermal images of facial profiles in which polarization-state information of the image forming radiance is retained and displayed. The resultant polarimetric images show enhanced facial features, additional texture, and details that are not present in the corresponding conventional thermal imagery. It has been generally thought that conventional thermal imagery (MidIR or LWIR) could not produce the detailed spatial information required for reliable human identification due to the so-called "ghosting" effect often seen in thermal imagery of human subjects. By using polarimetric information, we are able to extract subtle surface features of the human face, thus improving subject identification. The considered polarimetric image sets include the conventional thermal intensity image, S 0 , the two Stokes images, S 1 and S 2 , and a Stokes image product called the degree-of-linear-polarization (DoLP) image. Finally, Stokes imagery is combined with Fresnel relations to extract additional 3D surface information.

show abstract

“…There has been growing interest among researchers investigating polarization-based thermal imaging techniques in which information inherent in the imageforming radiance is retained and displayed as a 2D image, i.e., thermal polarimetric imaging [1][2][3][4][5]. It is known that both man-made and naturally occurring materials/objects emit radiation in the thermal IR that exhibits a preferential linear polarization state that is orthogonal to reflectioninduced polarization [6].…”

mentioning

confidence: 99%

Enhanced facial recognition for thermal imagery using polarimetric imaging

Gurton¹,

Yuffa²,

Videen³

2014

Opt. Lett.

Self Cite

View full text Add to dashboard Cite

We present a series of long-wave-infrared (LWIR) polarimetric-based thermal images of facial profiles in which polarization-state information of the image-forming radiance is retained and displayed. The resultant polarimetric images show enhanced facial features, additional texture, and details that are not present in corresponding conventional thermal imagery. It has been generally thought that conventional thermal imagery (MidIR or LWIR) could not produce the detailed spatial information required for reliable human identification due to the so-called "ghosting" effect often seen in thermal imagery of human subjects. By using polarimetric information, we are able to extract subtle surface features of the human face, thus improving subject identification. Polarimetric image sets considered include the conventional thermal intensity image, S0, the two Stokes images, S1 and S2, and a Stokes image product called the degree-of-linear-polarization image.

show abstract

Remote detection of buried land-mines and IEDs using LWIR polarimetric imaging

Cited by 26 publications

References 23 publications

Preliminary hand-held thermal imaging results of sequential monitoring of a simulated deceased individual on terrestrial ground

Preliminary hand-held thermal imaging results of sequential monitoring of a simulated deceased individual on terrestrial ground

LWIR polarimetry for enhanced facial recognition in thermal imagery

Enhanced facial recognition for thermal imagery using polarimetric imaging

Contact Info

Product

Resources

About