Abstract: An electronic device for monitoring a scene via a set of sensor(s) includes an acquisition module, of at least one representation of the scene via the sensor set, and a module for converting each representation into a respective occupancy grid. Each grid includes several zones, each corresponding to a respective portion of the representation, and each zone being in an occupied state if said portion contains an object and in an unoccupied state otherwise. The device also includes a module for calculating a differential grid corresponding to a difference between a current occupancy grid and a reference occupancy grid, by ignoring each zone of the reference grid which is in the occupied state and for which the corresponding zone of the current grid is in the unoccupied state, and a module for detecting a change in the scene, starting from the differential grid.

Abstract: An electronic device for monitoring a scene via a set of sensor(s) includes an acquisition module, of at least one representation of the scene via the sensor set, and a module for converting each representation into a respective occupancy grid. Each grid includes several zones, each corresponding to a respective portion of the representation, and each zone being in an occupied state if said portion contains an object and in an unoccupied state otherwise. The device also includes a module for calculating a differential grid corresponding to a difference between a current occupancy grid and a reference occupancy grid, by ignoring each zone of the reference grid which is in the occupied state and for which the corresponding zone of the current grid is in the unoccupied state, and a module for detecting a change in the scene, starting from the differential grid.