A bar code reader decodes a bar code symbol in a pixel image by transforming the data corresponding to the symbol along a first scan line, where the transformation comprises rotation and stretching. The reader generates a composite vector and a count vector from the transformed data. The reader then...http://www.google.es/patents/US5384451?utm_source=gb-gplus-sharePatente US5384451 - Method and apparatus for decoding bar code symbols using composite signals
Method and apparatus for decoding bar code symbols using composite signals
