A method for activating a lock in a vehicle includes capturing an image of an interior of a vehicle, the image comprising an occupant on a seat of the vehicle, detecting a weight value of the occupant on a respective seat of the vehicle, processing the image for determining whether the occupant is a human or an object or an animal, processing, in response to the determination that the occupant is the human, the image for determining a parameter of the human, and activating a lock based on the parameter, or the weight value and the parameter.