The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 8208765 B1

PDF
Full Text
Expired
Date of Patent:
Jun. 26, 2012

Filed:

Jan. 10, 2008
Applicants:

BO Wu, Shanghai, CN;

Jianjun Dou, Shanghai, CN;

Ning Le, Shanghai, CN;

Yadong Wu, Shanghai, CN;

Jing Jia, Shanghai, CN;

Inventors:

Bo Wu, Shanghai, CN;

Jianjun Dou, Shanghai, CN;

Ning Le, Shanghai, CN;

Yadong Wu, Shanghai, CN;

Jing Jia, Shanghai, CN;

Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06K 9/00 (2006.01);
U.S. Cl.
CPC ...
Abstract

An image of a character string composed of M pieces of characters is clipped from a document image, and the image is divided into separate characters. Image features of each character image are extracted. Based on the image features, N (N>1, integer) pieces of character images in descending order of degree of similarity are selected as candidate characters, from a character image feature dictionary which stores the image features of character image in units of character, and a first index matrix of M×N cells is prepared. A candidate character string composed of a plurality of candidate characters constituting a first column of the first index matrix, is subjected to a lexical analysis according to a language model, and whereby a second index matrix having a character string which makes sense is prepared. In the language model, statistics are taken and then, the lexical analysis is performed.


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Wu, Bo. (2012). Search and retrieval of documents indexed by optical character recognition (U.S. Patent No. 8208765). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8208765

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