Calibration and characterization of a COTS thermal camera for space

Abhilasha Jain, Dhananjay Sahoo, B. S.R. Sarvani, K. Sukumar, Ritvik Gupta, Adheesh Boratkar

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper describes a progressive process for calibration of a shutter less Commercial off the Shelf (COTS) thermal imaging camera for small scale remote sensing applications. Usually thermal imagers are equipped with shutters which provide a uniform temperature source to correct the accumulated offset errors in the digital read outs of such cameras. This paper aims at radiometric calibration and compensatory correction methods for improved imaging via shutter less cameras. The thermal camera considered in this paper, consists of an uncooled micro-bolometer with a focal plane array of 640 ∗ 512 pixels and field of view of 45 ∗ 37 degrees. The foremost approach for calibration involved the use of a water bath, with nominal temperature control, placed in the Field of View of the camera. Following this, a different approach for calibration using a blackbody and temperature control for the camera was used. Using the Planck's Law, a relation was obtained between the digital number output from the Read out Integrated Circuit (ROIC) of the camera and the radiance of the black body. This equation allowed digital pixel value to be related to the temperature of the object being captured. Gain and offset maps for the entire FPA were obtained using this data.

Original languageEnglish
Title of host publication2016 IEEE Aerospace Conference, AERO 2016
PublisherIEEE Computer Society
Volume2016-June
ISBN (Electronic)9781467376761
DOIs
Publication statusPublished - 27-06-2016
Externally publishedYes
Event2016 IEEE Aerospace Conference, AERO 2016 - Big Sky, United States
Duration: 05-03-201612-03-2016

Conference

Conference2016 IEEE Aerospace Conference, AERO 2016
CountryUnited States
CityBig Sky
Period05-03-1612-03-16

Fingerprint

shelves
Cameras
cameras
Calibration
calibration
field of view
shutters
pixel
temperature
Temperature control
temperature control
Camera shutters
Pixels
radiance
pixels
Bolometers
Focal plane arrays
Infrared imaging
remote sensing
Image sensors

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Space and Planetary Science

Cite this

Jain, A., Sahoo, D., Sarvani, B. S. R., Sukumar, K., Gupta, R., & Boratkar, A. (2016). Calibration and characterization of a COTS thermal camera for space. In 2016 IEEE Aerospace Conference, AERO 2016 (Vol. 2016-June). [7500657] IEEE Computer Society. https://doi.org/10.1109/AERO.2016.7500657
Jain, Abhilasha ; Sahoo, Dhananjay ; Sarvani, B. S.R. ; Sukumar, K. ; Gupta, Ritvik ; Boratkar, Adheesh. / Calibration and characterization of a COTS thermal camera for space. 2016 IEEE Aerospace Conference, AERO 2016. Vol. 2016-June IEEE Computer Society, 2016.
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Jain, A, Sahoo, D, Sarvani, BSR, Sukumar, K, Gupta, R & Boratkar, A 2016, Calibration and characterization of a COTS thermal camera for space. in 2016 IEEE Aerospace Conference, AERO 2016. vol. 2016-June, 7500657, IEEE Computer Society, 2016 IEEE Aerospace Conference, AERO 2016, Big Sky, United States, 05-03-16. https://doi.org/10.1109/AERO.2016.7500657

Calibration and characterization of a COTS thermal camera for space. / Jain, Abhilasha; Sahoo, Dhananjay; Sarvani, B. S.R.; Sukumar, K.; Gupta, Ritvik; Boratkar, Adheesh.

2016 IEEE Aerospace Conference, AERO 2016. Vol. 2016-June IEEE Computer Society, 2016. 7500657.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Jain A, Sahoo D, Sarvani BSR, Sukumar K, Gupta R, Boratkar A. Calibration and characterization of a COTS thermal camera for space. In 2016 IEEE Aerospace Conference, AERO 2016. Vol. 2016-June. IEEE Computer Society. 2016. 7500657 https://doi.org/10.1109/AERO.2016.7500657