Road sight distance detection method based on network geographic information system and machine vision

The invention discloses a road sight distance detection method based on a network geographic information system and machine vision. The road sight distance detection method comprises the following steps: firstly, carrying a positioning terminal based on the same network geographic information system on each of two detection vehicles; carrying out information association processing on the two positioning terminals, enabling the two detection vehicles to drive forwards and backwards on the target road, when the front vehicle disappears from the visual field of a camera carried on the rear vehicle, automatically triggering an automatic triggering device in the rear vehicle, and at the moment, calculating and obtaining the road alignment length between the two detection vehicles, namely the sight distance of the rear vehicle, by the network geographic information system according to the positions of the positioning terminals on the two detection vehicles; restraining the speeds of the front vehicle and the rear v