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Evaluating visual and tactile perceived quality of machined surfaces using multiscale slope and curvature analyses.

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Title: Evaluating visual and tactile perceived quality of machined surfaces using multiscale slope and curvature analyses.
Authors: Fast Berglund, Johan1,2 (AUTHOR) johan.fast.berglund@ri.se, Bartkowiak, Tomasz3 (AUTHOR), Wärmefjord, Kristina2 (AUTHOR)
Source: International Journal of Advanced Manufacturing Technology. Jun2026, Vol. 144 Issue 9/10, p6545-6562. 18p.
Subjects: Curvature, Surface texture, Texture analysis (Image processing), Surface finishing, Inspection & review, Surface roughness, Sensory evaluation, Data analysis
Abstract: After finish milling in die and mould manufacturing, the method used for quality control is usually visual and tactile inspection of the surface finish by the operator. The purpose of the inspection is to link the manufacturing conditions to the appearance of the surface. The perceived quality of a surface is related to how light is reflected by that surface which in turn depends on geometrical features, such as distribution of heights (i.e. surface roughness) as well as slopes and curvatures. Prior work relating perceived quality to surface properties has almost exclusively focused on roughness. The present study re-examines data from a previous study with the objective to investigate how the geometric topography characterisations multiscale curvature and slope analysis could be useful for relating surface texture both to how finish milled metallic surfaces were processed as well as how the appearance was perceived. It was found that large variation in surface curvatures and slopes, as well as sharp curvatures and steep slopes, generate lower perceived quality, and that this effect was most prominent in a certain range of scales. Here, it was suggested to use the slope parameter Total variation as a link between manufacture and function since it has good discriminatory power regarding tool and workpiece material used as well as discriminatory power and very good statistical correlation (Spearman rank coefficient ρ = -1) regarding perceived appearance when calculated at a scale around 20 μm. [ABSTRACT FROM AUTHOR]
Copyright of International Journal of Advanced Manufacturing Technology is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 194640954
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Evaluating visual and tactile perceived quality of machined surfaces using multiscale slope and curvature analyses.
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  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Advanced+Manufacturing+Technology%22">International Journal of Advanced Manufacturing Technology</searchLink>. Jun2026, Vol. 144 Issue 9/10, p6545-6562. 18p.
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  Data: <searchLink fieldCode="DE" term="%22Curvature%22">Curvature</searchLink><br /><searchLink fieldCode="DE" term="%22Surface+texture%22">Surface texture</searchLink><br /><searchLink fieldCode="DE" term="%22Texture+analysis+%28Image+processing%29%22">Texture analysis (Image processing)</searchLink><br /><searchLink fieldCode="DE" term="%22Surface+finishing%22">Surface finishing</searchLink><br /><searchLink fieldCode="DE" term="%22Inspection+%26+review%22">Inspection & review</searchLink><br /><searchLink fieldCode="DE" term="%22Surface+roughness%22">Surface roughness</searchLink><br /><searchLink fieldCode="DE" term="%22Sensory+evaluation%22">Sensory evaluation</searchLink><br /><searchLink fieldCode="DE" term="%22Data+analysis%22">Data analysis</searchLink>
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  Label: Abstract
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  Data: After finish milling in die and mould manufacturing, the method used for quality control is usually visual and tactile inspection of the surface finish by the operator. The purpose of the inspection is to link the manufacturing conditions to the appearance of the surface. The perceived quality of a surface is related to how light is reflected by that surface which in turn depends on geometrical features, such as distribution of heights (i.e. surface roughness) as well as slopes and curvatures. Prior work relating perceived quality to surface properties has almost exclusively focused on roughness. The present study re-examines data from a previous study with the objective to investigate how the geometric topography characterisations multiscale curvature and slope analysis could be useful for relating surface texture both to how finish milled metallic surfaces were processed as well as how the appearance was perceived. It was found that large variation in surface curvatures and slopes, as well as sharp curvatures and steep slopes, generate lower perceived quality, and that this effect was most prominent in a certain range of scales. Here, it was suggested to use the slope parameter Total variation as a link between manufacture and function since it has good discriminatory power regarding tool and workpiece material used as well as discriminatory power and very good statistical correlation (Spearman rank coefficient ρ = -1) regarding perceived appearance when calculated at a scale around 20 μm. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of International Journal of Advanced Manufacturing Technology is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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        Value: 10.1007/s00170-026-18198-z
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      – Code: eng
        Text: English
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        PageCount: 18
        StartPage: 6545
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        Type: general
      – SubjectFull: Surface texture
        Type: general
      – SubjectFull: Texture analysis (Image processing)
        Type: general
      – SubjectFull: Surface finishing
        Type: general
      – SubjectFull: Inspection & review
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      – SubjectFull: Surface roughness
        Type: general
      – SubjectFull: Sensory evaluation
        Type: general
      – SubjectFull: Data analysis
        Type: general
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      – TitleFull: Evaluating visual and tactile perceived quality of machined surfaces using multiscale slope and curvature analyses.
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            NameFull: Fast Berglund, Johan
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            NameFull: Bartkowiak, Tomasz
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            NameFull: Wärmefjord, Kristina
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            – D: 15
              M: 06
              Text: Jun2026
              Type: published
              Y: 2026
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            – TitleFull: International Journal of Advanced Manufacturing Technology
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