基于动态背景的视频图像运动检测

Moving Detection Based on Dynamic Background in Video Images

在动态变化背景下,实际视频图像运动检测受到光线很大的影响。本文把帧差绝对值法改进成三帧差法,并提出基于三帧差法和背景减除法相结合的运动目标检测和自适应背景更新方法——动态三帧差法。它采用了动态更新策略,能够在正确获得运动目标区域的同时有效地抑制背景渐变的干扰。通过动态背景下检测运动飞机的实验结果,证明该系统性能稳定,检测效果较好,满足实时系统的要求。

Under dynamic and changing background,the movement detection in real video images are greatly influenced by the lighting.Coterminous frame differencing is improved into three frame differencing in this article.Moreover,a new motion objects detection and background ufxlating method--dynamic three frame differencing is developed based on the three frame differencing and background ditterencing. It uses dynamic updating method, so it can correctly get the area of moving taget and effectly suppress the disturbance of changing backgrounds. Through experiment results of detecting moving airplane under dynamic backgrounds,it shows that the system has stable performance and better detecting effect to suffice real--time system.