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  Patent History
  • Application
    US 09/144588 2001-10-25
  • Publication
    US 2003081215 2003-05-01

published patent: Defect detection system for quality assurance using automated visual inspection

TitleDefect detection system for quality assurance using automated visual inspection
Priority Date2001-10-25 US 09/144588
2001-01-09 US 09/260520P
Inventors
Issue Date2003
Citation
US Published patent application US 2003081215. Washington, DC: US Patent and Trademark Office (USPTO), 2003 How to Cite?
AbstractA defect detection method and system for the automated visual inspection of web materials is provided. The invention utilize real Gabor function (RGF) filters with a non-linear function for estimating the local energy. An example method for quality assurance using automated visual inspection in accordance with the invention includes the steps of: automated design of a bank of RGF filters; using these RGF filters to sample the features of image under inspection; using a non-linear function to compute local energy estimate in the filtered images; combining all the filtered images using image fusion; and finally thresholding the resultant image to segment the defects in the inspection image. Possible embodiments of the described invention include detection of only a class of defects using a single tuned real Gabor filter or a bank of real Gabor functions.
Persistent Identifierhttp://hdl.handle.net/10722/176836

 

DC FieldValueLanguage
dc.date.accessioned2012-11-30T08:38:33Z-
dc.date.available2012-11-30T08:38:33Z-
dc.date.issued2003-
dc.identifier.citationUS Published patent application US 2003081215. Washington, DC: US Patent and Trademark Office (USPTO), 2003en_HK
dc.identifier.urihttp://hdl.handle.net/10722/176836-
dc.description.abstractA defect detection method and system for the automated visual inspection of web materials is provided. The invention utilize real Gabor function (RGF) filters with a non-linear function for estimating the local energy. An example method for quality assurance using automated visual inspection in accordance with the invention includes the steps of: automated design of a bank of RGF filters; using these RGF filters to sample the features of image under inspection; using a non-linear function to compute local energy estimate in the filtered images; combining all the filtered images using image fusion; and finally thresholding the resultant image to segment the defects in the inspection image. Possible embodiments of the described invention include detection of only a class of defects using a single tuned real Gabor filter or a bank of real Gabor functions.en_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License For Public Patent Documentsen_US
dc.titleDefect detection system for quality assurance using automated visual inspectionen_HK
dc.typePatenten_US
dc.description.naturepublished_or_final_versionen_US
dc.contributor.inventorKumar Ajayen_HK
dc.contributor.inventorPang, GKHen_HK
patents.identifier.applicationUS 09/144588en_HK
patents.description.assigneeKUMAR AJAY, ; PANG KWOK-HUNG GRANTHAM, ; THE UNIVERSITY OF HONG KONGen_HK
patents.description.countryUnited States of Americaen_HK
patents.date.publication2003-05-01en_HK
patents.date.application2001-10-25en_HK
patents.date.priority2001-10-25 US 09/144588en_HK
patents.date.priority2001-01-09 US 09/260520Pen_HK
patents.description.ccUSen_HK
patents.identifier.publicationUS 2003081215en_HK
patents.relation.familyUS 2003081215 (A1) 2003-05-01en_HK
patents.relation.familyUS 6753965 (B2) 2004-06-22en_HK
patents.description.kindA1en_HK
patents.typePatent_publisheden_HK

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