Character recognition methods and apparatus for locating and ext

Details Character recognition methods and apparatus for locating and ext Character recognition methods and apparatus for locating and ext

1990-10-19

1999-01-26

Moore, David K.

Image analysis

Histogram processing

For setting a threshold

382 1, G06K 900

Patent

active

058646299

ABSTRACT:
A method for automatically locating and recognizing amount data on a document by scanning the document to first locate a particular symbol, such as a dollar sign "$", and then using the located "$" to determine the document area containing the amount data to be recognized. Elements of the "$" symbol and amount characters are extracted from a gray-level image using binary seed and mask images derived using different gray-level thresholds. Operation is such that black pixels found in the higher threshold seed image are propagated in the lower threshold mask image to form connected components which are used for character recognition.

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