A method, apparatus and computer readable medium that determine if an authorized mobile device is in a vicinity of a vehicle, upon determination that the authorized mobile device is in the vicinity of the vehicle, capture a plurality of images from an environment surrounding the vehicle, detect one or more pedestrians in the plurality of images, correlate a movement trajectory of the authorized mobile device with movement trajectory of the one or more detected pedestrians to determine an authorized person, and actuate a function of the vehicle when the authorized person crosses a first threshold distance from the vehicle.