Measuring units measure state signals of an industrial technical process. A plurality of images is acquired about an edge portion of a wafer. A drain of the first n-channel MOS transistor is connected to a first line. Since both the semiconductor oxide film and the transparent conductive film can be easily penetrated by light, the p-type electrode is a transparent structure with a transparency over 75% within the visible light range. Search result sets may be refined andor reordered in accordance with color palette selections andor representative confidences of color palette selections for items at least referenced therein.