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:
Aug. 26, 2014
Filed:
Apr. 27, 2012
Zongyi Liu, Issaquah, WA (US);
Raymond Wensley Smith, Los Altos, CA (US);
Zongyi Liu, Issaquah, WA (US);
Raymond Wensley Smith, Los Altos, CA (US);
Google Inc., Mountain View, CA (US);
Abstract
A system and method of extracting formulas in an electronic image of a document using optical character recognition (OCR) is disclosed. In one example, the method comprises analyzing the electronic image, including a plurality of text lines, to generate a plurality of bounding blocks, each bounding block associated with a text line detected within the electronic image, searching the plurality of text lines to detect at least one character matching one of a plurality of character groups, calculating a symbol density of each of the plurality of character groups for each of the plurality of text lines, and classifying each of the plurality of text lines as at least one of an equation block type, an inline equation block type, and a descriptive block type, based on the symbol density, wherein each of the plurality of text lines classified as the equation block type is extracted.