Document recognition and automatic indexing for optical characte

Details Document recognition and automatic indexing for optical characte Document recognition and automatic indexing for optical characte

1988-05-20

1990-08-14

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

358467, 382 18, 382 30, G06K 920

Patent

active

049493922

ABSTRACT:
A library of templates defining the spacings between pre-printed lines and the corresponding line lengths for a plurality of different business forms is compared with the image data of an unknown document to determine the known business form (template) to which the document corresponds. Once the form of the document is determined, the optical character recognition system may intelligently associate the text characters in certain locations on the document with information fields defined by the pre-printed lines. The pre-printed lines in the image data are determined from the corresponding template and removed from the image data prior to optical character recognition processing.

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Gonzales et al., "Digital Image Processing", Addison-Wesley Publishing Co., 1977, pp. 67-70.
IBM Technical Disclosure Bulletin, vol. 13, No. 2, Jul. 1970, J. E. Carrington, "Line Finding by Profile Analysis", pp. 351-352.
Proceedings of the Eighth Conference on Pattern Recognition, 27-31 Oct. 1986, Paris, IEEE, Y. Nakano, "A Document Understanding System Incorporating with Character Recognition", pp. 801-803.

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