Analysis of errors in dimensional inspection based on active vision

Christopher C. Yang, Michael M. Marefat, Frank W. Ciarallo

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Scopus citations

Abstract

Spatial quantization error and displacement error are inherent in automated visual inspection. This kind of error introduces significant distortion and dimensional uncertainty in the inspection of a part. For example, centroid, area, perimeter, length, and orientation of parts are inspected by the vision inspection system. This paper discusses the effect of the spatial quantization error and the displacement error on the precision dimensional measurement of an edge segment of a 3D model. Probabilistic analysis in terms of the resolution of the image is developed for one dimensional and two dimensional quantization error. The mean and variance of these errors are derived. The position and orientation errors (displacement error) of the active vision sensor are assumed to be normally distributed. The probabilistic analysis utilizes these errors and the angle of the line projected on the image. Using this analysis, one can determine whether a given set of sensor setting parameters in an active system is suitable to obtain a desired accuracy for specific line segment dimensional measurements. In addition, based on this approach, one can determine sensor positions and viewing direction which meet the necessary range for tolerance and accuracy of inspection. These mechanisms are helpful for achieving effective, economic, and accurate active inspection.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsDavid P. Casasent
Pages96-104
Number of pages9
StatePublished - Dec 1 1994
EventIntelligent Robots and Computer Vision XIII: 3D Vision, Product Inspection, and Active Vision - Boston, MA, USA
Duration: Nov 2 1994Nov 4 1994

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume2354
ISSN (Print)0277-786X

Other

OtherIntelligent Robots and Computer Vision XIII: 3D Vision, Product Inspection, and Active Vision
CityBoston, MA, USA
Period11/2/9411/4/94

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • Cite this

    Yang, C. C., Marefat, M. M., & Ciarallo, F. W. (1994). Analysis of errors in dimensional inspection based on active vision. In D. P. Casasent (Ed.), Proceedings of SPIE - The International Society for Optical Engineering (pp. 96-104). (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 2354).