1. A method, comprising: capturing a depth image by a depth camera placed in a vehicle, the depth image covering a hand of a user and comprising pixels representing distances from the depth camera to parts of the user; determining a location of a fingertip of a pointing finger of the hand by processing the captured depth image; determining a location or region of a display device corresponding to the location of the fingertip; receiving a selection signal indicating selection of an item or an object at the determined location or the region of the display device based on a sensor signal received from an input device in the vehicle; and performing an operation associated with the selected item or object responsive to receiving the selection signal.