关键词: 目标检测, W⁴背景建模, 道路交叉口

Abstract: For many uncertain factors of intersection video surveillance such as more vehicles，uncertain speed and the changing environment and so on.So it is difficult to detect moving objects efficiently from video sequences.W4 algorithm is used in intersection video surveillance system.W4 algorithm first uses a pixelwise median filter to distinguish the stationary pixels from the video and uses these stationary pixels to form the background parametric model.At the same time according to the conditions to choose the updating methods pixel-based or object-based.Experimental results show that the W⁴ algorithm possesses higher performance on intersection video surveillance under complex environments.

Key words: vehicle detection, W⁴ background model, intersection