1. A system comprising a computer in a vehicle, the computer comprising a processor and a memory, wherein the computer is configured to: determine that a user is located within an operating region about an access component of the vehicle; collect image data of an object in a gesture path for the access component; compare the object image data to activating gesture parameters, the activating gesture parameters including at least one of a range of gesture dynamic characteristics and a range of user characteristics, the activating gesture parameters defining a plurality of activating user gestures; and operate an actuator to move the access component between open and closed positions when the comparison identifies that the object image data corresponds to one of the plurality of activating user gestures.