1. A computing device configured for providing an interface, comprising: a processor; memory in electronic communication with the processor; and instructions stored in the memory, the instructions being executable to: project a projected image from a projector; capture an image using a camera, wherein the camera operates in a visible spectrum; calibrate the computing device; detect a hand; track the hand by scanning a search space within the captured image for a tracking pattern representative of the hand, the search space size being based on the hand size, the hand size being determined by a change in intensity of a portion of the captured image; and perform an operation.