1. A gesture recognition interface system comprising: a projector configured to project invisible light and visible images onto a background surface, the projection of the invisible light being interleaved with the projection of the visible images; at least one camera configured to receive a plurality of images based on a reflected light contrast difference between the background surface and a sensorless input object during projection of the invisible light; and a controller configured to determine a given input gesture based on changes in relative locations of the sensorless input object in the plurality of images, and being further configured to initiate a device input associated with the given input gesture.