how-upc-barcode-scanners-read-bars-and-spaces

Published at 800 × 1200 in UPC Codes Explained: Retail Requirements & Getting Started
Illustration showing how UPC barcode scanners read both the black bars and the white spaces between them

An educational illustration demonstrating how UPC barcode scanners decode information by reading the pattern created by both black bars and the white spaces between them, highlighting why proper spacing, contrast, and print quality are critical for reliable barcode scanning.

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