Patent ID: 8818033
Filing Date: 2014-08-26
Classification: G06K

Abstract:
1. A computer implemented method of extracting formulas in an electronic image of a document using optical character recognition (OCR), the method comprising: analyzing, by one or more computing devices, 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, wherein each of the one or more computing devices comprises one or more processors; searching, by the one or more computing devices, the plurality of text lines to detect at least one character matching one of a plurality of character groups; calculating, by the one or more computing devices, a symbol density of each of the plurality of character groups for each of the plurality of text lines; classifying, by the one or more computing devices, 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; extracting, by the one or more computing devices, at least one bounding block associated with each of the plurality of text lines classified as the equation block type; and processing, by the one or more computing devices, a set of the plurality of text lines remaining using OCR to produce an output document.