Algorithms for chemical detection, identification and quantification for thermal hyperspectral imagers

Vallières, Alexandre; Villemaire, André; Chamberland, Martin; Belhumeur, Louis; Farley, Vincent; Giroux, Jean; Legault, Jean-François

doi:10.1117/12.632114

Cited by 23 publications

(23 citation statements)

References 4 publications

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“…It is this equation can be used at the detection algorithm of gases. The algorithm of automation gases detection was under development and tests [10,12]. The influence of emissivity coefficient on measurement results can also be compensated by adopting several methods from pyrometric non-contact temperature measurements.…”

Section: Model Of Process Detectionmentioning

confidence: 99%

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Infrared imaging Fourier-transform spectrometer used for standoff gas detection

Kastek¹,

Piątkowski²,

Polakowski³

2011

WIT Transactions on Ecology and the Environment

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The article presents the detection of gases using an infrared imaging Fouriertransform spectrometer (IFTS). The Telops Company has developed the IFTS instrument HyperCam, which is offered as short or long wave infrared device. The principle of HyperCam operation and methodology of gases detection has been shown in the paper, as well as theoretical evaluation of gases detection possibility. The calculation of an optical path between an IFTS device, cloud of gases and background has been also discussed. The variation of a signal reaching the IFTS caused by the presence of a gas has been calculated and compared with the reference signal obtained without the presence of a gas in IFTS's field of view. Verification of theoretical result has been made by laboratory measurements. Some results of the detection of various types of gases have also been included in the paper.

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Section: Model Of Process Detectionmentioning

confidence: 99%

“…Finally, results are presented to demonstrate the capabilities and the performances of the remote gas quantification by using hyperspectral data obtained from the Telops HyperCam. The latter is described in much detail in prior references [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Infrared imaging Fourier-transform spectrometer used for standoff gas detection

Kastek¹,

Piątkowski²,

Polakowski³

2011

WIT Transactions on Ecology and the Environment

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show abstract

“…Finally, results are presented to demonstrate the capabilities and the performances of the remote gas quantification by using hyperspectral data obtained from the Telops HyperCam spectrometer. The latter is described in much detail in the references [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

“…It is this equation can be used at the detection algorithm of gases. The algorithms of automation gases detection were under development and tests [10,12]. The influence of emissivity coefficient on measurement results can also be compensated by adopting several methods from pyrometer non-contact temperature measurements.…”

Section: Ifts Fovmentioning

confidence: 99%

Infrared Imaging Fourier Transform Spectrometer as the Stand-Off Gas Detection System

Kastek

Piątkowski²,

Trzaskawka³

2011

Metrology and Measurement Systems

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The article presents the detection of gases using an infrared imaging Fourier-transform spectrometer (IFTS). The Telops company has developed the IFTS instrument HyperCam, which is offered as a short-or long-wave infrared device. The principle of HyperCam operation and methodology of gas detection has been shown in the paper, as well as theoretical evaluation of gas detection possibility. Calculations of the optical path between the IFTS device, cloud of gases and background have been also discussed. The variation of a signal reaching the IFTS caused by the presence of a gas has been calculated and compared with the reference signal obtained without the presence of a gas in IFTS's field of view. Verification of the theoretical result has been made by laboratory measurements. Some results of the detection of various types of gases has been also included in the paper.

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“…Dual thresholding approaches have been used for real-time processing, but two detection banks were used instead of BMA as a second pass. 44 …”

Section: Algorithm Complexity Comparisonmentioning

confidence: 99%

Performance metrics for the evaluation of hyperspectral chemical identification systems

et al. 2016

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Abstract. Remote sensing of chemical vapor plumes is a difficult but important task for many military and civilian applications. Hyperspectral sensors operating in the long-wave infrared regime have well-demonstrated detection capabilities. However, the identification of a plume's chemical constituents, based on a chemical library, is a multiple hypothesis testing problem which standard detection metrics do not fully describe. We propose using an additional performance metric for identification based on the so-called Dice index. Our approach partitions and weights a confusion matrix to develop both the standard detection metrics and identification metric. Using the proposed metrics, we demonstrate that the intuitive system design of a detector bank followed by an identifier is indeed justified when incorporating performance information beyond the standard detection metrics.

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Algorithms for chemical detection, identification and quantification for thermal hyperspectral imagers

Cited by 23 publications

References 4 publications

Infrared imaging Fourier-transform spectrometer used for standoff gas detection

Infrared imaging Fourier-transform spectrometer used for standoff gas detection

Infrared Imaging Fourier Transform Spectrometer as the Stand-Off Gas Detection System

Performance metrics for the evaluation of hyperspectral chemical identification systems

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