A system and method for locating and reading digital data in data regions within a data field disposed on a surface of an object to be identified include the capability of compensating for optical or physical distortions of the data field as viewed by an optical reader. The data field is defined by X-axis...http://www.google.com.tw/patents/US5410620?utm_source=gb-gplus-share專利 US5410620 - Digital data reader of digital data recording sheet
