Detection method of highway traffic congestion state based on video

• Main Authors: SHE YONGYE, ZHAO YOUTING, YANG GUIGEN, LI XIYING
• Format: Patent
• Language: Chinese; English
• Published: 22.12.2010
• Subjects: PHYSICS; SIGNALLING; TRAFFIC CONTROL SYSTEMS

The invention relates to a detection method of a traffic congestion state based on a video, and the traffic congestion detection usually focuses on the whole situation of traffic flows rather than traffic flow parameters of an individual vehicle. The directivity and regularity of movement of vehicles on a highway are obvious, an optical flow field is orderly and regular, and an optical flow vector reflects the size and direction of the traffic speed directly. The detection of the road state can be realized by studying variation law of intensity of road movement information of the optical flow in a video monitoring range. The invention provides the novel detection method of highway traffic congestion under monitoring of a macro wide-angle video, which comprises the following two steps: the first step: calculating the optical flow field of an overall image and eliminating optical flow points that do not satisfy a main direction; and then calculating an average value of the optical speeds after being screened, w