| US 7,480,408 B2 | ||
| Degraded dictionary generation method and apparatus | ||
| Sun Jun, Beijing (China); Yutaka Katsuyama, Kawasaki (Japan); and Satoshi Naoi, Kawasaki (Japan) | ||
| Assigned to Fujitsu Limited, Kawasaki (Japan) | ||
| Filed on Aug. 10, 2005, as Appl. No. 11/200,194. | ||
| Claims priority of application No. 2004 1 0585882 (CN), filed on Aug. 18, 2004. | ||
| Prior Publication US 2006/0056696 A1, Mar. 16, 2006 | ||
| Int. Cl. G06K 9/34 (2006.01); G06K 9/46 (2006.01); G06K 9/68 (2006.01) | ||
| U.S. Cl. 382—176 [382/190] | 12 Claims |
| 1. A method for generating a degraded dictionary, comprising:
generating a plurality of degraded patterns from an original character image, based on a plurality of degradation parameters;
establishing a plurality of degraded dictionaries which correspond to the plurality of degradation parameters, respectively,
by extracting features of the degraded patterns; and
selecting one of the plurality of dictionaries, which matches the degradation level of a test sample set best, as a final
degraded dictionary.
|