Overview - EN ISO 16610-45:2025 (Morphological profile filters: Segmentation)
EN ISO 16610-45:2025 is the ISO/CEN standard for morphological profile filters: segmentation within the Geometrical Product Specifications (GPS) filtration series. The document defines terminology and formal concepts for partitioning a profile (1D surface trace) into topographic features - such as peaks, pits, hills, and dales - and specifies three segmentation methods: watershed segmentation, Wolf pruning, and crossing‑the‑line. The standard assumes a continuous surface and provides calculation methods and conceptual rules for consistent profile segmentation in surface metrology and profilometry.
Key topics and technical requirements
- Terminology and definitions: clear definitions for topographic features (peak, pit, hill, dale) and segmentation/pruning terms to ensure consistent communication across metrology tools and reports.
- Segmentation methods specified:
- Watershed segmentation - partitions a profile into regions where all maximal upward/downward paths converge to a peak or pit.
- Wolf pruning - a pruning technique used with watershed segmentation to remove minor features according to defined criteria.
- Crossing‑the‑line method - alternative segmentation approach with a specified calculation method.
- Calculation methods: prescriptive calculation steps and conceptual diagrams (including annexes) for implementing segmentation and pruning algorithms in software and measurement systems.
- Scope assumptions: explicitly designed for continuous surfaces; the standard references handling of plateaus and alternative techniques (see Annex B).
- Interoperability: integrates with the GPS matrix and filtration models to align with other GPS standards and measurement decision rules.
Practical applications
- Surface texture analysis and feature extraction (profilometry) for manufacturing quality control.
- Automated surface inspection in machining, grinding, coating, and tribology studies to identify and quantify surface features.
- Implementation in metrology software, CAD/CAM post‑processing, and instrument firmware that require standardised segmentation and pruning rules.
- Research and development in surface engineering where reproducible profile partitioning is required.
Who should use this standard
- Metrology laboratories and calibration services
- Surface texture analysts and quality engineers in manufacturing industries
- Software developers of profilometry and surface analysis tools
- Standards bodies and consultants working on GPS conformity and specifications
Related standards
Using EN ISO 16610-45:2025 ensures consistent, repeatable segmentation of profile data for reliable surface characterization and cross‑tool comparability.
