1. A method for determining yaw of an elongated interface object as it interacts with a touchscreen, the method comprising: from a sensor of a touchscreen, receiving a touch image that corresponds to an area of the touchscreen that has an elongated interface object positioned at least proximate to it, wherein the elongated interface object has a pitch and a yaw with respect to a surface of the touchscreen; performing a first transformation to obtain a first transformation image of the touch image; performing a second transformation to obtain a second transformation image of the touch image, wherein the first transformation differs from the second transformation; and determining the yaw for the elongated interface object based on both, the first and second transformation images.