Changchun Institute of Optics,Fine Mechanics and Physics,CAS
Non-uniformity correction and point target detection based on gradient sky background | |
Liu, R.; D.-J. Wang; L. Zhang; D.-B. Zhou; P. Jia and P. Ding | |
2017 | |
发表期刊 | Jilin Daxue Xuebao (Gongxueban)/Journal of Jilin University (Engineering and Technology Edition) |
卷号 | 47期号:5 |
摘要 | Tow-point Non-uniformity Correction (NUC) based on blackbody is not suitable to correct actual sky background. To overcome this problem, a new two-point correction method based on gradient sky background was proposed. First, the fixed positions of bind pixels are replaced by the pixels in neighborhood. Then, the two-point images are captured at two different pitch angles in the pure sky by infrared focal plane array detector; and gain and offset coefficients are obtained from two-point correction. Finally, the two correction coefficients are modified to remove a few remaining bas points. Results show that this method has good performance. In the second place, a new bilateral filtering and gradient template algorithm is proposed to detect dim point target after correction. First, median filter is used to remove remaining single noise. Then, convolution with the gradient template is made. Dim point target can be detected after adjusting image grayscale to the certain threshold interval. Results show that the proposed gradient template algorithm has advantages to suppress complex background. It improves Signal-to-noise Ratio (SNR), and has the preference of low complexity and easy implementation in real-time system. 2017, Editorial Board of Jilin University. All right reserved. |
收录类别 | ei |
语种 | 中文 |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ciomp.ac.cn/handle/181722/59088 |
专题 | 中科院长春光机所知识产出 |
推荐引用方式 GB/T 7714 | Liu, R.,D.-J. Wang,L. Zhang,et al. Non-uniformity correction and point target detection based on gradient sky background[J]. Jilin Daxue Xuebao (Gongxueban)/Journal of Jilin University (Engineering and Technology Edition),2017,47(5). |
APA | Liu, R.,D.-J. Wang,L. Zhang,D.-B. Zhou,&P. Jia and P. Ding.(2017).Non-uniformity correction and point target detection based on gradient sky background.Jilin Daxue Xuebao (Gongxueban)/Journal of Jilin University (Engineering and Technology Edition),47(5). |
MLA | Liu, R.,et al."Non-uniformity correction and point target detection based on gradient sky background".Jilin Daxue Xuebao (Gongxueban)/Journal of Jilin University (Engineering and Technology Edition) 47.5(2017). |
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Non-uniformity corre(1989KB) | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | 浏览 下载 |
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