dc.date.accessioned | 2021-08-23T22:55:58Z | |
dc.date.accessioned | 2022-10-19T00:25:44Z | |
dc.date.available | 2021-08-23T22:55:58Z | |
dc.date.available | 2022-10-19T00:25:44Z | |
dc.date.created | 2021-08-23T22:55:58Z | |
dc.date.issued | 2016 | |
dc.identifier | http://hdl.handle.net/10533/251740 | |
dc.identifier | 1151278 | |
dc.identifier | WOS:000380967000177 | |
dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/4483003 | |
dc.description.abstract | Images 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.language | eng | |
dc.relation | https://doi.org/10.3390/s16071121 | |
dc.relation | handle/10533/111557 | |
dc.relation | 10.3390/s16071121 | |
dc.relation | handle/10533/111541 | |
dc.relation | handle/10533/108045 | |
dc.rights | info:eu-repo/semantics/article | |
dc.rights | info:eu-repo/semantics/openAccess | |
dc.rights | Atribución-NoComercial-SinDerivadas 3.0 Chile | |
dc.rights | http://creativecommons.org/licenses/by-nc-nd/3.0/cl/ | |
dc.title | Modeling and Compensating Temperature-Dependent Non-Uniformity Noise in IR Microbolometer Cameras | |
dc.type | Articulo | |