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.:
Date of Patent:
Nov. 29, 1994
Filed:
Nov. 19, 1991
M Margaret Withgott, Los Altos, CA (US);
Ramana R Rao, San Francisco, CA (US);
Xerox Corporation, Stamford, CT (US);
Abstract
Methods and apparatus for determining phrase frequency in an undecoded document text image without first converting the document to character codes. The method includes segmenting of the document image into word units without document image decoding, and morphological image processing to determine word unit characteristics for placement into equivalence classes utilizing non-content based information. All of the possible sequences of selected word units in reading order in the document constituting phrases are mapped into a list of corresponding sequences of the associated equivalence class labels for each selected image unit in the phrase, and the corresponding equivalence class sequences are analyzed to determine the frequency of the phrases.