Virtual MRTD – an indirect method to measure MRTD of thermal imagers using computer simulation

• Autorzy: Chrzanowski Krzysztof , Hong Viet Nguyen

Identyfikatory

DOI

10.37190/oa200413

• Języki publikacji: EN

Abstrakty

EN

Minimum resolvable temperature difference (MRTD) is considered as the most important parameter of thermal imagers. A new method of MRTD measurement without drawbacks of other methods is presented in this paper. Proposed MRTD measurement method coded as virtual MRTD is based on a three steps measurement concept using semi-automatic objective measurements and computer simulation. First, objective parameters of the tested thermal imager are measured. Second, software simulates this tested thermal imager and generates the image of 4-bar target of specified spatial frequency (size) and contrast (temperature difference). Third, a human observer analyses the images of the 4-bar target generated by the software on the screen of PC set and measures MRTD of the simulated thermal imager at specified set of spatial frequencies. The proposed method offers higher measurement speed, lower cost and typically better accuracy in comparison with the typical MRTD measurement method.

Słowa kluczowe

EN

MRTD; minimum resolvable temperature difference; virtual MRTD; indirect method; computer simulation; thermal imager

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Optica Applicata
• Rocznik: 2020
• Tom: Vol. 50, nr 4
• Strony: 671--688
• Opis fizyczny: Bibliogr. 19 poz., rys., tab.

Twórcy

autor

Chrzanowski Krzysztof

• Military University of Technology, Institute of Optoelectronics, Kaliskiego 2, 00-908 Warsaw, Poland
• INFRAMET, Bugaj 29a, Koczargi Nowe, 05-082 Stare Babice, Poland

autor

Hong Viet Nguyen

• Military University of Technology, Institute of Optoelectronics, Kaliskiego 2, 00-908 Warsaw, Poland

Bibliografia

• [1] NATO, Definition of Nominal Static Range Performance for Thermal Imaging Systems, STANAG 4347, 1995.
• [2] HOLST G.C., Testing and Evaluation of Infrared Imaging Systems, JCD Publishing Co., 1993.
• [3] CHRZANOWSKI K., Testing thermal imagers, Military University of Technology, 2010.
• [4] PERIĆ D., LIVADA B., MRTD Measurements Role in Thermal Imager Quality Assessment, 2019.
• [5] DE JONG A.N., BAKKER S.J.M., Fast and objective MRTD measurement, Proceedings of SPIE 916, 1988, pp. 127–143, DOI:10.1117/12.945571.
• [6] WEBB C.M., HALFORD C.E., Dynamic minimum resolvable temperature testing for staring array imagers, Optical Engineering 38(5), 1999, pp. 845–851, DOI:10.1117/1.602281.
• [7] BIJL P., VALETON J., Triangle orientation discrimination: the alternative to minimum resolvable temperature difference and minimum resolvable contrast, Optical Engineering 37(7), 1998, pp. 1976–1983, DOI:10.1117/1.601904.
• [8] MCHUGH S.W., IRWIN A., VALETON J.M., BIJL P., TOD test method for characterizing electro-optical system performance, Proceedings of SPIE 4372, 2001, pp. 39–45, DOI:10.1117/12.439159.
• [9] BIJL P., VALETON J.M., Guidelines for accurate TOD measurement, Proceedings of SPIE 3701, 1999, pp. 14–25, DOI:10.1117/12.352986.
• [10] WITTENSTEIN W., Minimum temperature difference perceived - a new approach to assess under sampled thermal imagers, Optical Engineering 38(5), 1999, pp. 773–781, DOI:10.1117/1.602265.
• [11] NATO, Experimental Assessment Parameters and Procedures for Characterisation of Advanced Thermal Imagers, North Atlantic Treaty Organisation, Research and Technology Organization, Neuilly-sur-Seine Cedex, France, 2003.
• [12] WITTENSTEIN W., Thermal range model TRM3, Proceedings of SPIE 3436, 1998, pp. 413–424, DOI:10.1117/12.328038.
• [13] XU L., LI Q., LU Y., Method of object MRTD-testing for thermal infrared imager, Proceedings of SPIE 10815, 2018, article 108151F, DOI:10.1117/12.2502131.
• [14] VAN RHEENEN A.D., TAULE P., THOMASSEN J.B., MADSEN E.B., MRTD: man versus machine, Proceedings of SPIE 10625, 2018, article 106250N, DOI:10.1117/12.2304581.
• [15] www.inframet.com (accessed April 23, 2020).
• [16] www.hgh-infrared.com (accessed April 23, 2020).
• [17] www.ci-systems.com (accessed April 23, 2020).
• [18] www.sbir.com (accessed April 23, 2020).
• [19] O’SHEA P., SOUSK S., Practical issues with 3D noise measurements and application to modern infrared sensors, Proceedings of SPIE 5784, 2005, pp. 262–271, DOI:10.1117/12.604588.

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).