Rock Falls Impacting Railway Tracks: Detection Analysis through an Artificial Intelligence Camera Prototype

Figure 3

Functional flow diagram illustrating the computer vision algorithm solution. When an obstacle is detected within RoI of alert, the algorithm is initialized on AiCP main board. After waiting frames (that is the time needed for the obstacle to pass from RoI of alert to RoI of alarm), the obstacle reaches the RoI of alarm. If the expected time which expires without any obstacle is detected on the railway track, a false alarm is issued (a); if the obstacle gets out the RoI of alarm after waiting frames (user-defined), nothing is changed (b); if the obstacle stops moving inside the RoI of alarm after waiting frames (user-defined), an alert signal is automatically transmitted.

(a)

(b)

(c)