A system for decoding coded data provided on or in a surface is provided. The coded data includes at least one data portion arranged on or in the surface and alignment data at least partially indicative of at least one clock indicator. The system includes a sensor which senses data provided in a sensing...http://www.google.com.tw/patents/US7600688?utm_source=gb-gplus-share專利 US7600688 - System surface for decoding coded data
