1. A gesture recognition interface system comprising: at least one light source positioned to illuminate a first side of a light-diffusive screen; at least one camera positioned on a second side of the light-diffusive screen, the second side being opposite the first side, and configured to receive a plurality of images based on a brightness contrast difference between the light-diffusive screen and an input object; and a controller configured to determine a given input gesture based on changes in relative locations of the input object in the plurality of images, and being further configured to initiate a device input associated with the given input gesture.