Overview
ISO 12653-3:2014 - Electronic imaging - Test target for scanning of office documents (Part 3) specifies a printed test target and associated procedures for assessing the consistency of output quality from lower-resolution reflection scanning systems (configured to scan up to 300 dpi). It applies to black‑and‑white, greyscale and colour office document scanners (with or without half‑tone reproduction) and is intended to help operators set up scanners, monitor quality over time, and compare equivalent systems.
Key topics and technical requirements
- Scope & purpose
- Designed for reflection (paper) documents scanned at up to 300 dpi; not for transparent/translucent originals.
- Target must include the legend “FOR USE AT UP TO 300 dpi ONLY.”
- Test target design
- Full‑page (typical A4) on a white opaque glossy base.
- Elements are arranged in areas A–P and include:
- Frame and alignment arrows (Area A, P).
- Diagonal scale, concentric circles and Pestrecov star for spatial-frequency evaluation (Area B, C).
- Character sets per ISO 446 and various type styles/sizes, including very small characters (Areas D, E).
- Resolution charts (ISO No.2) and ladder patterns with specified frequencies (e.g., 1.8, 2.5, 3.6 lines/mm; ISO No.2 charts 2.0–7.1 lp/mm) (Areas F, N).
- Half‑tone wedges and grey scales in CMYK and greys (Areas K, M, L), with density steps and specified screen sizes (e.g., 3.3 and 6.9 lines/mm).
- Uniform density fields (Area H - minimum density 1.2 measured per ISO 5‑4), background area for border testing (Area J), and a colour image (Area O).
- Procedures
- Tests are run under normal operational conditions after warm‑up and any manufacturer calibration.
- Scanning must use the normal enhancement/compression settings; revalidation recommended after software changes.
- Targets may be single‑ or double‑sided for duplex scanners (identical designs both sides).
- Evaluation
- The target is designed to reveal the point of failure for lower‑resolution scanners so users can determine acceptable document characteristics and limits.
Applications and users
Who benefits:
- Scanner manufacturers and test labs - product validation and acceptance testing.
- IT and imaging/records management teams - routine quality assurance and scanner calibration.
- Procurement and service engineers - comparing equivalent systems and maintaining consistent scan quality.
Use cases:
- Initial system setup and tuning.
- Periodic QA to monitor drift or degradation in scanner performance.
- Acceptance testing after maintenance or software changes.
Related standards
Keywords: ISO 12653-3:2014, electronic imaging, test target, document scanner testing, 300 dpi, scan quality, half-tone, ISO standards, scanner QA.
Open preview (PDF)Electronic imaging — Test target for scanning of office documents — Part 3: Test target for use in lower resolution applications