1. A method for determining a deployment level of an airbag in a vehicle, the method comprising: repeatedly capturing depth images of a scene that includes a region of a vehicle seat; repeatedly determining occupancy information from the captured depth images; upon occurrence of an event that triggers deployment of the airbag, performing the steps of capturing depth images of the scene and determining occupancy information more rapidly than before when deployment of the airbag is triggered; and indicating the deployment level of the airbag based at least in part on the occupancy information determined after occurrence of the event.