An image feature analysis section performs image feature analysis of an input image to generate an image feature quantity independent from image coordinates. The cut out includes side edges positioned at acceptable minimum and maximum actuator expansion distances giving an indication of proper functioning of the brakes. A further input circuit is described which contains an oscillator. A pair of wheels are also attached to the body. Gas pressure in the container body will cause the valve in the foil seal to release gas from the interior of the container body into the space in the cap and the pressure of the gas in the ring seal is deflected from the lip to allow the gas to flow thereby and outwardly in the channels in the cap. The second capsule comprises the drug retention section and the release device.