基于阴影的视频SAR动目标检测  

Shadow-Based Video-SAR Moving Target Detection

作　　者：康玉奇 向聪[1] KANG Yuqi;XIANG Cong(Xi'an Electronic Engineering Research Institute,Xi'an 710100)

机构地区：[1]西安电子工程研究所,西安710100

出　　处：《火控雷达技术》2023年第4期23-28,共6页Fire Control Radar Technology

摘　　要：视频合成孔径雷达(SAR)是雷达成像邻域的研究重点之一,其具有高帧率连续成像特性,有利于对地面运动目标进行实时监测。虽然动目标自身图像难以聚焦,但由于雷达工作频率高,合成孔径时间较短,其真实位置会存在阴影,利用此特征可进行动目标检测。本文对基于阴影的动目标检测流程进行了探讨,并提出了一种新的背景建模方法用于对消待检测图像的背景目标。通过实验验证,该方法能更好地剔除目标阴影对背景的影响,使对消后目标阴影完整保留,从而改善漏警率。Video synthetic aperture radar(SAR)is one of the research focuses in the field of radar imaging.It has the advantage of high frame-rate continuous imaging,which is conducive to real-time monitoring of ground moving targets.Although the images of moving targets are difficult to focus,the high working frequency of the radar and the short synthetic aperture time result in the existence of shadows in their true positions,which can be used for moving target detection.This paper discusses the shadow-based moving target detection process and proposes a new background modeling method to eliminate the background targets of the images to be inspected.Test results show that the proposed method can better eliminate the impact of the target shadows on the background and retain complete target shadows after elimination,thereby reducing the missed detection rate.

关 键 词：视频SAR动目标检测 背景建模 阴影检测 

分 类 号：TN95[电子电信—信号与信息处理]