Document search and retrieval apparatus, recording medium and program
US6944344B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 6, 2001 |
| Grant date | Sep 13, 2005 |
| Priority date | — |
| Expiry date | Apr 18, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99936
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A search apparatus searches for a keyword from a character recognition result using an index table. The character recognition result being obtained as a result of character recognition of characters in an original document. The index table includes an index character string; a position of a portion, in the character recognition result, which matches the index character string; and a credibility which is defined for each character included in the index character string and indicates a probability of the character existing in a portion, in the original document, which corresponds to a portion, in the character recognition result, which matches the character. The search apparatus includes a position specifying section for determining whether or not the keyword matches a portion in the character recognition result based on the index character string and the position of the portion in the character recognition result which matches the index character string included in the index table; and when a match is determined, for specifying the position of the portion in the character recognition result which matches the keyword; and a calculation section for calculating a keyword credibility wh…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.