METHOD AND SYSTEM FOR ENCODING DATA, AND METHOD AND SYSTEM FOR READING ENCODED DATA

摘要

A method and system for encoding a numeric value by the placement of indicia at fixed sensing locations on a substrate, each indicium chosen from two or more sets of indicia, each set producing different responses in a sensor, and for decoding the numeric value by sensing the presence and character of the indicia with a set of sensors apposed to the fixed sensing locations.