READER USING MOVING AVERAGES TO BREAK THE (N,K) CODE BARRIER FOR UPC, EAN, AND OTHERS

摘要

The new generic bar code decoder system described, with its multistage error correcting, is far more powerful than dedicated reference decode algorithms for popular linear and two dimensional barcodes. The 1-7 and 2-8 EAN and UPC character substitution problems are 100 % solved: the ink spread tolerance improves; far greater levels of random systematic edge noise are tolerated and decoded; even many spile edge errors greater than 0.50X module can be corrected; and, generous levels of acceleration are tolerated. The ultimate linear binary coded binary bar code with error correcting, BCB, also described. Computer simulation testing of the generic bar code decoder has already been conducted on BCB and UPC timing count scan data records that were distorted with various levels of ink spread, noise, spikes and acceleration using new bar code test results, to show the advances that have been made in bar code science.