红外与毫米波学报, 2018, 37 (4): 421, 网络出版: 2019-01-10
红外线列探测器闪元噪声分析与抑制方法
Analysis and suppression method of flickering pixel noise in images of infrared linear detector
闪元噪声 红外线列探测器 多帧最大值投影 弱小目标 flickering pixel noise infrared linear detector multi-frame maximum projection low signal-noise ratio(SNR) small target
摘要
分析了闪元现象在红外扫描图像中的特点, 设计了基于时序多帧最大值投影的闪元检测与补偿方法.考虑到闪元仍然保留了一定的信息获取能力, 采用一维中值滤波的方法单独对闪元位置进行背景抑制, 对闪元补偿后的图像进行常规目标检测.实验验证表明, 经背景抑制后, 闪元位置平均目标信杂比可以达到常规位置的96%, 目标信息得到较好的保留.常规目标检测方法不再受到闪元噪声的干扰.
Abstract
In this paper, the characteristics of the flickering pixel phenomenon in the infrared scanning image are analyzed. The detection and compensation method of the flickering pixel based on the time series multi-frame maximum projection is designed. Considering that the flickering pixels still retain a part of the information acquisition ability, the one-dimensional median filter is used to suppress the background for the position where flickering pixels exist. Traditional methods of target detection are carried out for the image after flickering pixels compensated. Experiment results show that after background suppression, the target average signal to clutter ratio in the flickering pixel location can reach 96% of the normal position, and the target information is well preserved. The traditional method of target detection is no longer interfered by flickering noise.
刘高睿, 孙胜利, 林长青, 吕凭乐. 红外线列探测器闪元噪声分析与抑制方法[J]. 红外与毫米波学报, 2018, 37(4): 421. LIU Gao-Rui, SUN Sheng-Li, LIN Chang-Qing, LYU Ping-Yue. Analysis and suppression method of flickering pixel noise in images of infrared linear detector[J]. Journal of Infrared and Millimeter Waves, 2018, 37(4): 421.