A method of reading a bar code having guard bars at both sides thereof without fail even if the bar code image is highly distorted. An image region taken in by a CCD camera is scanned in horizontal and/or vertical directions to find out a first guard bar in the bar code. Then, a first scanning line for...http://www.google.de/patents/US6332574?utm_source=gb-gplus-sharePatent US6332574 - Method of reading bar code
