Image analysis – Histogram processing – For setting a threshold
Patent
1988-09-07
1992-12-08
Boudreau, Leo H.
Image analysis
Histogram processing
For setting a threshold
382 50, G06K 942
Patent
active
051704420
ABSTRACT:
Character pattern transforming system providing a character pattern whose size can be reduced or enlarged with an optional scale factor includes a gray scale device providing a plurality of values per pixel for adjusting the gray scale associated with the character pattern. The system further includes a pixel positioning circuit for determining the position of each pixel of the reduced or enlarged character pattern and a pixel coloring circuit for determining which of the pixels in the reduced or enlarged character pattern is to be colored based on the gray scale data. The thickness of the vertical lines of the transformed character pattern can be adjusted following enlargement or reduction of the character pattern. A detector circuit identifies right angle corners of the original character pattern to ensure that such right angle corners are maintained in the transformed character pattern.
REFERENCES:
patent: 3784981 (1974-01-01), Borowski et al.
patent: 4578812 (1986-03-01), Yui
patent: 4633503 (1986-12-01), Hinman
patent: 4742556 (1988-05-01), Davis, Jr. et al.
patent: 4829587 (1989-05-01), Glazer et al.
Murai Kiyoaki
Nagai Akio
Boudreau Leo H.
Kaplan Blum
Seiko Epson Corporation
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