Barcode Recognition 101: How to Decode QR Code, DataMatrix and PDF417?
2D Barcode Recognition OM Step 1. Location find the barcodes QR Code Distinct square "targets" in three of the four corners. The "missing" fourth target also indicates the correct orientation for the QR code DataMatrix Distinct pattern of solid lines on the left and bottom edges, along with alternating filled and empty boxes (called modules) along the top and right edges PDF417 start and end patterns include several vertical bars Step 2. Decoding Interpret patterns of the black/white modules based on that code type's specifications Start Pattern Indicator Right Row Indicator Left Row Data Stop Pattern Codewords Result Numeral or character, along with redundant data Encoded Value codeword 1 + codeword 2 + codeword... By Dynamsoft Barcode Reader Team
Barcode Recognition 101: How to Decode QR Code, DataMatrix and PDF417?
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