Global threshold method and apparatus

Details Global threshold method and apparatus Global threshold method and apparatus

1994-09-23

1997-04-15

Boudreau, Leo

Image analysis

Learning systems

Trainable classifiers or pattern recognizers

382172, 382270, 382271, 358466, G06K 962, G06K 936, G06K 946, H04N 140

Patent

active

056218150

ABSTRACT:
The problem of thresholding is considered from a clustering point of view and a novel weight-based clustering method (WCThresh) is implemented in a neural network image processor 50. The neural network image processor 50 uses weights 51-53, representing clusters of gray scale pixels of an image of document 43, to provide a threshold for the image of document 43. The processor 50 modifies weights 51-53 with the input pixels and comparator 60 using a nearest value criterion to provide the threshold.

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