Patent ID: 6952449

Claim:
A detection apparatus for road obstructions for automatically monitoring obstructions on a road by using a remote monitoring camera, comprising: a motion vector calculator for calculating a motion vector of a video image in a road area; a motion vector direction detector for detecting the direction of the motion vector; a statistics memory for accumulating the direction of the motion vector and at least the mean value and the pre-detected variance of the directions of pre-detected motion vectors in a road area in a normal state; and an abnormal motion vector degree calculator for calculating an abnormal motion vector degree from the direction of the motion vector detected by the motion vector direction detector and at least the mean value and the variance of the directions of the motion vectors in the road area in the normal state which are accumulated in the statistics memory, and wherein road obstructions are detected on the basis of the abnormal motion vector degree calculated by the abnormal motion vector degree calculator.