Intersection operation state intelligent diagnosis system and method based on feature matching

The invention discloses an intersection operation state intelligent diagnosis system and method based on feature matching. The method specifically comprises the steps that peak and flat peak videos are collected over an intersection through an unmanned aerial vehicle; detecting dynamic parameters such as flow and speed of motor vehicles and non-motor vehicles at the intersection and static parameters such as internal and entrance lane marking lines and guide arrow coordinates at the intersection; constructing a multivariate fusion index system; establishing an intersection influence factor database and an improvement measure database; performing simulation deduction on data obtained by static modeling and dynamic perception based on a digital twinning technology to obtain data characteristics of different traffic scenes in an intersection influence factor database; and realizing one-to-one strong rule association between the influence factor library and the improvement measure library through a multi-dimensio