A numerical investigation of diffuse images for effective defect detection

J. M. Parker, Z. Hou

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


Numerical simulation is a flexible, practical tool for efficiently investigating machine vision hardware/software configurations for myriad industrial applications and can significantly reduce the engineering time necessary to design and implement a system. In this paper, physically accurate image synthesis is used to investigate the ability of diffuse angle images to detect topographical defects reliably in smooth, highly specular coatings; a specular-plus-diffuse reflectance model provides the Scientific underpinning for this hypothesis. The specific results presented in this study show that diffuse images of topographical defects yield high-contrast grey-scale images compared with diffuse images of similar coatings without topographical defects, facilitating effective defect detection and providing a foundation for characterizing the severity of defects present in a given region.

Original languageEnglish
Pages (from-to)1073-1079
Number of pages7
JournalProceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture
Issue number7
StatePublished - 2002


  • Defect detection
  • Image synthesis
  • Reflectance model
  • Specular surfaces

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering


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