Fixed pattern noise compensation in a mercury cadmium telluride infrared focal plane array

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dc.contributor.advisorDe Jager, Gerharden_ZA
dc.contributor.authorReddy, Pravenen_ZA
dc.date.accessioned2016-10-21T07:32:18Z
dc.date.available2016-10-21T07:32:18Z
dc.date.issued1998en_ZA
dc.descriptionBibliography: pages 106-109.en_ZA
dc.description.abstractThis thesis describes techniques for the correction of spatial noise artifacts in a mercury cadmium telluride infrared camera system. The spatial noise artifacts are a result of nonuniformities within the infrared focal plane detector array. The techniques presented dispense with the need for traditional temperature references, and provide nonuniformity compensation by using only the statistics of the moving infrared scene and motion of the camera assembly for calibration. Frame averaging is employed, assuming that all of the detector pixels will eventually be irradiated with the same levels of incident flux after some extended period of time. Using a statistical analysis of the camera image data, the correction coefficients are re-calculated and updated. These techniques also ensure that the calculated coefficients continually track the variations in the dark currents as well as temperature changes within the dewar sensor cooling vessel. These scene-based reference free approaches to the calculation of compensation coefficients in the infrared camera are shown to be successful in compensating for the effects of fixed pattern spatial noise.en_ZA
dc.identifier.apacitationReddy, P. (1998). <i>Fixed pattern noise compensation in a mercury cadmium telluride infrared focal plane array</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Electrical Engineering. Retrieved from http://hdl.handle.net/11427/22231en_ZA
dc.identifier.chicagocitationReddy, Praven. <i>"Fixed pattern noise compensation in a mercury cadmium telluride infrared focal plane array."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Electrical Engineering, 1998. http://hdl.handle.net/11427/22231en_ZA
dc.identifier.citationReddy, P. 1998. Fixed pattern noise compensation in a mercury cadmium telluride infrared focal plane array. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Reddy, Praven AB - This thesis describes techniques for the correction of spatial noise artifacts in a mercury cadmium telluride infrared camera system. The spatial noise artifacts are a result of nonuniformities within the infrared focal plane detector array. The techniques presented dispense with the need for traditional temperature references, and provide nonuniformity compensation by using only the statistics of the moving infrared scene and motion of the camera assembly for calibration. Frame averaging is employed, assuming that all of the detector pixels will eventually be irradiated with the same levels of incident flux after some extended period of time. Using a statistical analysis of the camera image data, the correction coefficients are re-calculated and updated. These techniques also ensure that the calculated coefficients continually track the variations in the dark currents as well as temperature changes within the dewar sensor cooling vessel. These scene-based reference free approaches to the calculation of compensation coefficients in the infrared camera are shown to be successful in compensating for the effects of fixed pattern spatial noise. DA - 1998 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1998 T1 - Fixed pattern noise compensation in a mercury cadmium telluride infrared focal plane array TI - Fixed pattern noise compensation in a mercury cadmium telluride infrared focal plane array UR - http://hdl.handle.net/11427/22231 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/22231
dc.identifier.vancouvercitationReddy P. Fixed pattern noise compensation in a mercury cadmium telluride infrared focal plane array. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Electrical Engineering, 1998 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/22231en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Electrical Engineeringen_ZA
dc.publisher.facultyFaculty of Engineering and the Built Environment
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherElectrical Engineeringen_ZA
dc.subject.otherDigital Image Processingen_ZA
dc.titleFixed pattern noise compensation in a mercury cadmium telluride infrared focal plane arrayen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMSc (Eng)en_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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