ISO/IEC 16480:2015

Overview

ISO/IEC 16480:2015 defines methods to assess the quality of optical readable marks (ORM) as they are displayed on electronic screens or read by general‑purpose cameras on mobile devices. The standard addresses two reading environments:

• MQR - bar codes rendered on electronic displays and read by 2D imagers (display produces its own light).
• MBR - symbols intended to be read by mobile device cameras in ambient lighting.

ISO/IEC 16480:2015 complements existing print‑grade methods by specifying display‑specific conditions, alternative illumination, pixel/display requirements, X‑dimension (module) ranges, grading criteria and reporting formats for automatic identification and data capture.

Key technical topics and requirements

• Scope and environments: Distinguishes MQR (display→imager) and MBR (camera→printed/displayed symbol) test procedures.
• Display pixel conditions: Black and white modules on displays must be produced by directly controlling pixels so a black module uses the same number of pixels as an equivalent white module.
• X‑dimension / Z‑dimension: Appropriate X‑dimension on displays is 0.38 mm to 0.63 mm. Symbols are non‑conforming if measured Z‑dimension < 0.35 mm or > 0.65 mm.
• Luminescence (display brightness): Measured in cd/m². Recommended minimum for dependable scanning is > 90 cd/m², and displays < 40 cd/m² may not be readable. Grading table:
  • ≥70 cd/m² → Grade 4.0
  • 60 → 3.0
  • 50 → 2.0
  • 40 → 1.0
  • <40 → 0
• Image capture for verification: Use a verifier with no auxiliary illumination; set exposure so white areas reach 70–85% of sensor saturation.
• Relation to ISO/IEC 15415 and 15416: Uses those print‑quality methodologies with modifications - e.g., R set to 90%, Symbol Contrast not graded, synthetic aperture 0.38 mm max for reference and 0.25 mm for grading; linear barcode scan reflectance profiles may use an aperture of 80% of the X‑dimension.
• Quiet Zone Noise (QZN): QZN = Navg / Cavg, where Navg measures quiet‑zone variation and Cavg the symbol contrast. QZN thresholds define grades (≤0.25 → Grade 4.0 ... >0.40 → Grade 0).
• Reporting: Grades are reported with prefix MQR or MBR and include grade details and Z‑dimension (example: MQR/2,8/10/N (Z = 0,4 mm)).

Practical applications and users

• Who uses it: verifier manufacturers, application specification developers, symbology implementers, mobile app developers, and integrators of barcode/QR code solutions.
• Typical use cases: mobile ticketing, access control, coupon redemption, advertising and marketing (camera‑based scanning), and verification of mobile‑displayed codes for retail or transit.
• Practical value: Ensures consistent readability, interoperability between mobile displays and imagers/cameras, and standardized grading/reporting for deployments that rely on automatic identification and data capture.

Related standards

• ISO/IEC 15415 - 2D barcode print quality test specification
• ISO/IEC 15416 - Linear barcode print quality test specification
• ISO/IEC 19762 - Harmonized vocabulary for automatic identification and data capture

Keywords: ISO/IEC 16480:2015, mobile devices, MQR, MBR, 2D bar code, barcode quality, luminescence, X‑dimension, quiet zone noise, verifier, automatic identification and data capture.