Image analysis – Image enhancement or restoration – Artifact removal or suppression
Patent
1997-08-04
2000-02-08
Bella, Matthew C.
Image analysis
Image enhancement or restoration
Artifact removal or suppression
382257, 382260, 382266, 358429, 358456, G06K 940
Patent
active
060235349
ABSTRACT:
A method for generating forms using halftones along with a set of low-complexity image processing steps to extract the characters for recognition. The method exploits texture differences between character strokes and halftoned boxes or text fields. Form frames are rendered as black and white halftones and characters are extracted by exploiting differences in texture between the frames and the character strokes. A sequence of simple image processing operations, easily done in hardware, eliminates the frames while leaving the characters intact. Halftones, giving the appearance of a light color as in the dropout-color method, are easily produced by page description languages; thus, blank and filled-in forms can be scanned, printed, stored and photocopied at low cost.
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Bella Matthew C.
Blair Philip E.
Cohen G. B.
Ortiz L. M.
Xerox Corporation
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