Dabao Wang, Zhongguo Wang, Mingxuan Wu, Chao Zhang, Yue Hu. Non-uniformity correction algorithm of space-borne long-wave infrared focal plane arrays based on improved Gamma curve[J]. Infrared and Laser Engineering, 2022, 51(5): 20210510
- Infrared and Laser Engineering
- Vol. 51, Issue 5, 20210510 (2022)
Fig. 1. (a) Schematic diagram of the original response characteristic curves of the IRFPA detector; (b) Schematic diagram of response characteristic curves after correcting by traditional linear correction algorithm
Fig. 2. (a) Algorithm flow step 1: get raw output of detector unit; (b) Algorithm step 2: non-linear mapping; (c) Algorithm step 3: linear non-uniformity correction; (d) Algorithm step 4: inverse non-linear mapping
Fig. 3. Schematic diagram of the proposed algorithm
Fig. 4. (a) Image gray distribution before correction; (b) Result for NUC of the proposed algorithm; (c) Result for NUC of typical curve fitting based algorithm;(d) Result for NUC of multi-point correction algorithm
Fig. 5. (a) Semi-real infrared remote sensing image before correction; (b) Result for NUC of the proposed algorithm; (c) Result for NUC of curve fitting based algorithm; (d) Result for NUC of multi-point correction algorithm
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Table 1. Performance parameters of artificial blackbody images non-uniformity corrected by different algorithms
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Table 2. Performance parameters of semi-real infrared remote sensing image non-uniformity corrected by different algorithms
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