What texture analysis tells you
Manufacturing processes leave signatures. Turning, grinding and brushing create directional lay; blasting and peening create isotropic dimpled surfaces; embossing, laser texturing and moulding create periodic patterns. Natural and biological surfaces have their own structures. Texture analysis measures these signatures, so a process can be verified, a defect identified, or a functional surface designed and checked.
Direction and isotropy
Texture direction describes which way a surface’s features run. From the 3D map, the analysis finds the dominant directions (first, second and third) and expresses how directional the surface is as a percentage of isotropy. A ground surface is strongly directional; a shot-peened surface is close to isotropic. Lay direction affects friction anisotropy, sealing, paint appearance and how lubricant flows across the surface.
Periodicity
Engineered textures often repeat: knurls, micro-dimples, embossed patterns, woven and moulded surfaces. The analysis reports the percentage of periodicity and the period itself. Checking that a laser-textured or embossed pattern repeats at its design pitch, and finding where it does not, is a direct process-control measurement.
Peaks, hills and valleys
Peaks are where contact happens. Peak density and peak curvature describe how many summits a surface presents and whether they are sharp or rounded, which governs contact pressure, wear-in and friction.
Segmentation goes further, dividing the surface into discrete hills and valleys and reporting their number, area and volume. The same approach counts grains, pores, beads and dimples. NANOVEA’s surface boundary study segmented Styrofoam beads by combining the height map with the reflected-intensity image recorded in the same scan.
Measuring texture without contact
Texture parameters are only as good as the map they are calculated from. Chromatic confocal sensing measures height directly at each point, with no stitching to introduce artefacts at tile boundaries. That matters for periodicity and direction analysis, where a stitching seam would itself look like texture. Because the measurement is non-contact, delicate surfaces such as biological tissue, foams, leather and soft polymers keep their real texture during the scan.
