Detecting defects with image data

  • Authors:
  • Mónica Benito;Daniel Peña

  • Affiliations:
  • Universidad de Alcalá, Department of Statistics, Spain;Universidad Carlos III de Madrid, Department of Statistics, Spain

  • Venue:
  • Computational Statistics & Data Analysis
  • Year:
  • 2007

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Abstract

Quality control using continuous monitoring from images is emerging as an active research area. These applications require adaptive statistical techniques in order to detect and isolate process abnormalities. A novel approach is introduced for monitoring schemes in the setting of image data when the quality is associated with uniform pixel gray-scales. The proposed approach requires the definition of a statistic which takes into account both the spatial dependency and the changes in local variability. An application on paper surface demonstrates how the monitoring scheme performs in practical applications.