| Title |
A Study on the Non-Uniformity-Correction Method for Cooled Infrared Detector by Scene Temperature, Background Temperature Variation, and Integration Time Change |
| Authors |
강원석(Won-Seok Kang) ; 정형진(Hyoung-Jin Jung) ; 박인구(In-Gu Park) ; 이기남(Ki-Nam Lee) |
| DOI |
https://doi.org/10.5573/ieie.2021.58.8.78 |
| Keywords |
Cooled infrared detector; Non-Uniformity-Correction; Integration time variation; 2D-4P-NUC |
| Abstract |
Infrared imaging camera requires an Non-Uniformity-Correction(NUC) process to convert same radiant energy that is concentrated on a two-dimensional focal plane array into a uniform digital image signal. In this paper, a table-based NUC that enables correcting non-uniform images caused by continuous integration time changes and scene temperature, ambient temperature variation is studied. The validity of proposed NUC is demonstrated using modeling data, and the calibration performance is verified using laboratory data acquired under various conditions. The experiment shows that it was possible to maintain non-uniformity at a low level with the changes of scene temperature and background temperature as well as changes of integration time when the proposed method was applied. I expect this approach to be of great help in terms of operability when applied to the cooled infrared seeker, which requires uniform image generation while pointing at targets with a wide temperature range, in an attempt to improve the existing discontinuous NUC for integration time changes. |