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Title: Sequential detection of web defects

A system for detecting defects on a moving web having a sequential series of identical frames uses an imaging device to form a real-time camera image of a frame and a comparitor to comparing elements of the camera image with corresponding elements of an image of an exemplar frame. The comparitor provides an acceptable indication if the pair of elements are determined to be statistically identical; and a defective indication if the pair of elements are determined to be statistically not identical. If the pair of elements is neither acceptable nor defective, the comparitor recursively compares the element of said exemplar frame with corresponding elements of other frames on said web until one of the acceptable or defective indications occur.
Authors:
 [1] ;  [2] ;  [1] ;  [1]
  1. (Albuquerque, NM)
  2. (Cedar Crest, NM)
Publication Date:
OSTI Identifier:
873888
Report Number(s):
US 6266437
DOE Contract Number:
AC04-94AL85000
Resource Type:
Patent
Research Org:
SANDIA CORP
Country of Publication:
United States
Language:
English
Subject:
sequential; detection; web; defects; detecting; moving; series; identical; frames; imaging; device; form; real-time; camera; image; frame; comparitor; comparing; elements; corresponding; exemplar; provides; acceptable; indication; pair; determined; statistically; defective; neither; nor; recursively; compares; element; indications; occur; imaging device; moving web; camera image; sequential series; detecting defects; time camera; corresponding element; /382/348/356/