dc.date.accessioned2021-08-23T22:55:58Z
dc.date.accessioned2022-10-19T00:25:44Z
dc.date.available2021-08-23T22:55:58Z
dc.date.available2022-10-19T00:25:44Z
dc.date.created2021-08-23T22:55:58Z
dc.date.issued2016
dc.identifierhttp://hdl.handle.net/10533/251740
dc.identifier1151278
dc.identifierWOS:000380967000177
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/4483003
dc.description.abstractImages rendered by uncooled microbolometer-based infrared (IR) cameras are severely degraded by the spatial non-uniformity (NU) noise. The NU noise imposes a fixed-pattern over the true images, and the intensity of the pattern changes with time due to the temperature instability of such cameras. In this paper, we present a novel model and a compensation algorithm for the spatial NU noise and its temperature-dependent variations. The model separates the NU noise into two components: a constant term, which corresponds to a set of NU parameters determining the spatial structure of the noise, and a dynamic term, which scales linearly with the fluctuations of the temperature surrounding the array of microbolometers. We use a black-body radiator and samples of the temperature surrounding the IR array to offline characterize both the constant and the temperature-dependent NU noise parameters. Next, the temperature-dependent variations are estimated online using both a spatially uniform Hammerstein-Wiener estimator and a pixelwise least mean squares (LMS) estimator. We compensate for the NU noise in IR images from two long-wave IR cameras. Results show an excellent NU correction performance and a root mean square error of less than 0.25 degrees C, when the array's temperature varies by approximately 15 degrees C.
dc.languageeng
dc.relationhttps://doi.org/10.3390/s16071121
dc.relationhandle/10533/111557
dc.relation10.3390/s16071121
dc.relationhandle/10533/111541
dc.relationhandle/10533/108045
dc.rightsinfo:eu-repo/semantics/article
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 Chile
dc.rightshttp://creativecommons.org/licenses/by-nc-nd/3.0/cl/
dc.titleModeling and Compensating Temperature-Dependent Non-Uniformity Noise in IR Microbolometer Cameras
dc.typeArticulo


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