液晶与显示
液晶與顯示
액정여현시
CHINESE JOURNAL OF LIQUID CRYSTALS AND DISPLAYS
2015年
3期
484-491
,共8页
林培杰%郑柏春%陈志聪%吴丽君%程树英
林培傑%鄭柏春%陳誌聰%吳麗君%程樹英
림배걸%정백춘%진지총%오려군%정수영
视频监控%运动检测%背景动态更新%FPGA
視頻鑑控%運動檢測%揹景動態更新%FPGA
시빈감공%운동검측%배경동태경신%FPGA
video surveillance%moving detection%background dynamic refresh%FPGA
为了实现视频监控现场多区域运动目标检测,分析了传统运动检测算法的不足,结合帧间差分法和背景差分法,提出背景动态更新的运动检测算法。该算法能自适应背景的变化,减少由背景变化造成的误检测。构建基于 FPGA 的视频监控系统,在 FPGA上用该算法实现了640 pixel×480 pixel,30帧/s 视频信号流的运动目标实时检测。系统提供了分区域运动目标检测的功能。检测区域的大小、位置和个数可通过简单的按键操作进行设定。测试结果表明,系统可以实时地对进入划定区域的运动目标进行检测和闪烁告警,且资源占用较少,适合在小规模的 FPGA上进行实现。
為瞭實現視頻鑑控現場多區域運動目標檢測,分析瞭傳統運動檢測算法的不足,結閤幀間差分法和揹景差分法,提齣揹景動態更新的運動檢測算法。該算法能自適應揹景的變化,減少由揹景變化造成的誤檢測。構建基于 FPGA 的視頻鑑控繫統,在 FPGA上用該算法實現瞭640 pixel×480 pixel,30幀/s 視頻信號流的運動目標實時檢測。繫統提供瞭分區域運動目標檢測的功能。檢測區域的大小、位置和箇數可通過簡單的按鍵操作進行設定。測試結果錶明,繫統可以實時地對進入劃定區域的運動目標進行檢測和閃爍告警,且資源佔用較少,適閤在小規模的 FPGA上進行實現。
위료실현시빈감공현장다구역운동목표검측,분석료전통운동검측산법적불족,결합정간차분법화배경차분법,제출배경동태경신적운동검측산법。해산법능자괄응배경적변화,감소유배경변화조성적오검측。구건기우 FPGA 적시빈감공계통,재 FPGA상용해산법실현료640 pixel×480 pixel,30정/s 시빈신호류적운동목표실시검측。계통제공료분구역운동목표검측적공능。검측구역적대소、위치화개수가통과간단적안건조작진행설정。측시결과표명,계통가이실시지대진입화정구역적운동목표진행검측화섬삭고경,차자원점용교소,괄합재소규모적 FPGA상진행실현。
In order to realize multi-regions moving obj ect detection in video surveillance,the shortage of traditional moving obj ect detection algorithm is analyzed.Combining the background subtraction al-gorithm and frame difference algorithm,we propose a method which dynamically refresh the back-ground.This algorithm can adapt with the background automatically,and reduce error detections caused by the change of background.We build a video surveillance system based on a FPGA chip,and implement the algorithm on the chip.The system can detect moving object in a 640 pixel×480 pixel, 30 frames/s video stream.The system also provides a function which detects moving object in inde-pendent regions.The number,size and location of the regions can be set easily by simple keystrokes. The system’s configuration is convenient,and has strong flexibility.It can be utilized in various fields such as intelligent surveillance and production safety.
