Optical character recognition system and method using special no

Details Optical character recognition system and method using special no Optical character recognition system and method using special no

1997-02-27

2000-01-04

Boudreau, Leo H.

Image analysis

Image transformation or preprocessing

Changing the image coordinates

382298, G06K 932

Patent

active

060118792

ABSTRACT:
Character normalization is accomplished using a scaling program. Data input to a scaling program are character images and character parameters (height of result buffer frame, character height, character width and character location), and parameters calculated for scaling (the size of a normalized portion to be output; and the top and bottom and the left and right hand spaces of a normalization pattern to be output). In the present invention, normalization is performed by adjusting the parameters, without especially changing the processing flow. A threshold value is provided in accordance with the size and the location of an input character in order to change a calculation method for parameters that are to be transmitted to the scaling program. Since the values at the boundary of the threshold value are continuous, no discontinuity appears in a resultant normalized image that covers the range from small characters to large characters, and seamless normalization is therefore accomplished.

REFERENCES:
patent: 3784981 (1974-01-01), Borowski, Jr. et al.
patent: 4977602 (1990-12-01), Beato
patent: 5033097 (1991-07-01), Nakamura
patent: 5537489 (1996-07-01), Sinden et al.
patent: 5566252 (1996-10-01), Miyaza
patent: 5715336 (1998-02-01), Tanaka

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