Influence Of Nonuniformity On Infrared Focal Plane Array Performance

Milton, A. F.; Barone, F. R.; Kruer, M.

doi:10.1117/12.7973588

Cited by 191 publications

(103 citation statements)

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“…The temperature of a detector array has important impact on a value of output signal and its parameters like NETD [1,2,4]. Therefore even insignificant change of detector temperature has a crucial influence on quality of nonuniformity correction (NUC) process, which has an affects on image quality.…”

Section: Introductionmentioning

confidence: 99%

Temperature influence compensation in microbolometer detector for image quality enhancement

Krupiński¹,

Sosnowski²,

Madura³

et al. 2016

Proceedings of the 2016 International Conference on Quantitative InfraRed Thermography

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In the article a non-uniformity correction method is presented which allows to compensate for the influence of detector's temperature drift. Presented method utilizes estimated dependency between output signal of detectors and their temperature. In the presented method, the dependency between output signal value and the temperature of the detector is estimated during time of starting detector. The coefficients are estimated for every pixel. Proposed method allows to compensate the influence of detectors temperature fluctuation and increase a time between shutter actuation process. Additional lenses coefficients allow to compensate ambient temperature fluctuation.

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Section: Introductionmentioning

confidence: 99%

Temperature influence compensation in microbolometer detector for image quality enhancement

Krupiński¹,

Sosnowski²,

Madura³

et al. 2016

Proceedings of the 2016 International Conference on Quantitative InfraRed Thermography

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“…All detectors have disparate characteristics which affect the image quality 9 . Non uniformity Correction is provided to compensate these disparities 10 .…”

Section: Generation Of Non Uniformity Correctionmentioning

confidence: 99%

High Temperature Calibration of Thermal Imagers for Infrared Measurements on Military Platforms

et al. 2017

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Calibration of thermal imaging system is not a straight forward process and hence manufacturers suggest re-calibration at factory itself. However, it is time consuming and expensive. A few research papers refer various approaches to perform low temperature calibration considering the wide requirement of low temperature measurements (typically less than 150 °C). However, no reference is available in open literature about high temperature calibration of thermal imagers. Hence, the possibility of high temperature calibration of thermal imaging systems has been explored using high temperature blackbody sources available at laboratory. With the use of neutral density filters, calibration has been performed in mid-wave (3.7 μm -4.8 μm) and long-wave (7.7 μm -9.5 μm) bands of imagers for IR measurements. The developed calibration has also been tested for field measurements.

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“…The PRNU is due to the difference of response of each pixel to a given signal; it is therefore a signal-dependent noise. These two types of non-uniformities have been corrected by the characterization of the CCD in use [12][13][14][15]. The FPN characterization is made by obscuring the CCD and capturing the dark image.…”

Section: Correction At Low Spatial Frequenciesmentioning

confidence: 99%

Improvements for determining the modulation transfer function of charge-coupled devices by the speckle method

Pozo¹,

Ferrero²,

Rubiño³

et al. 2006

Opt. Express

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We present and evaluate two corrections applicable in determining the modulation transfer function (MTF) of a charge-coupled device (CCD) by the speckle method that minimize its uncertainty: one for the low frequency region and another for the high frequency region. The correction at the low-spatial-frequency region enables attenuation of the high power-spectral-density values that arise from the field and CCD response non-uniformities. In the high-spatial-frequency region the results show that the distance between the CCD and the aperture is critical and significantly influences the MTF; a variation of 1 mm in the distance can cause a root-mean-square error in the MTF higher than 10%. We propose a simple correction that minimizes the experimental error committed in positioning the CCD and that diminishes the error to 0.43%.

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Influence Of Nonuniformity On Infrared Focal Plane Array Performance

Cited by 191 publications

References 0 publications

Temperature influence compensation in microbolometer detector for image quality enhancement

Temperature influence compensation in microbolometer detector for image quality enhancement

High Temperature Calibration of Thermal Imagers for Infrared Measurements on Military Platforms

Improvements for determining the modulation transfer function of charge-coupled devices by the speckle method

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