A method of reconstructing successive scans of bar codes having a plurality of dark elements separated from light elements, comprising the steps of: performing a first scan of the bar code thereby determining the position and the width of the elements in the first scan with respect to an absolute reference...http://www.google.com.au/patents/US20020121551?utm_source=gb-gplus-sharePatent US20020121551 - Method of reconstructing successive scans of a bar code
