Non-uniformity correction and point target detection based on gradient sky background

CORC > 长春光学精密机械与物理研究所 > 中国科学院长春光学精密机械与物理研究所 > 中科院长春光机所知识产出

	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
刊名	Jilin Daxue Xuebao (Gongxueban)/Journal of Jilin University (Engineering and Technology Edition)
	2017
卷号	47 期号:5
英文摘要	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.
语种	中文
内容类型	期刊论文
源URL	[http://ir.ciomp.ac.cn/handle/181722/59088]
专题	长春光学精密机械与物理研究所_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).