| Gradient sky scene based nonuniformity correction and local weighted filter based denoising |
| Liu, R.; Wang, D. J.; Jia, P. ; Che, X.
|
| 2018
|
发表期刊 | Optik
(IF:2.187[JCR-2019],1.597[5-Year]) |
ISSN | 0030-4026
|
卷号 | 174页码:748-756 |
摘要 | The nonuniformity of infrared focal plane array (IRFPA) seriously affects the image quality and the measurement accuracy of the infrared detector system. Long-wave infrared (LWIR) detector has highly sensitivity and image unstable factors, and the nonuniformity tends to drift slowly with the change of the environment. In this paper, we propose a new nonuniformity correction (NUC) algorithm based on gradient sky scene. Firstly, we obtain the two-point calibration images at two different pitch angles in the pure sky without any cloud. And then, the gain and offset coefficients are calculated from the standard two-point NUC. Finally, the local weighted filter based denoising algorithm is employed to eliminate a few residual isolated noise. Computational result shows that the SNR gain of the proposed method is increased 2.50 dB compared to the standard two-point method based on uniform blackbody. Results indicate that the proposed algorithm exhibits a superior correction effect and has the advantage of low complexity which meets the real-time requirements. |
关键词 | Nonuniformity correction
Gradient sky scene
Local weighted filter
Residual isolated noise
focal-plane arrays
sensors
Optics
|
DOI | 10.1016/j.ijleo.2018.06.125
|
收录类别 | SCI
; EI
|
引用统计 |
|
文献类型 | 期刊论文
|
条目标识符 | http://ir.ciomp.ac.cn/handle/181722/61005
|
专题 | 中国科学院长春光学精密机械与物理研究所
|
推荐引用方式 GB/T 7714 |
Liu, R.,Wang, D. J.,Jia, P.,et al. Gradient sky scene based nonuniformity correction and local weighted filter based denoising[J]. Optik,2018,174:748-756.
|
APA |
Liu, R.,Wang, D. J.,Jia, P.,&Che, X..(2018).Gradient sky scene based nonuniformity correction and local weighted filter based denoising.Optik,174,748-756.
|
MLA |
Liu, R.,et al."Gradient sky scene based nonuniformity correction and local weighted filter based denoising".Optik 174(2018):748-756.
|
修改评论