Patent · US Active

Compression of digital images of scanned documents

US8995780B2 · kind B2 · utility

1Cited by

20References

12Claims

0Family size

Assignee

I.R.I.S · BE

Inventors

Michel Dauw · Machelen, BE
Pierre De Muelenaere · Court-Saint-Etienne, BE

Key dates

Filing date	Dec 23, 2013
Grant date	Mar 31, 2015
Priority date	—
Expiry date	Dec 23, 2033

Classification

Technology area (CPC G)Physics
CPC primaryG06V30/10
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A method for creating a binary mask image from an inputted digital image of a scanned document, including the steps of creating a binarized image by binarizing the inputted digital image, detecting first text regions representing light text on a dark background, and inverting the first text regions, such that the inverted first text regions are interpretable in the same way as dark text on a light background. A method for comparing in a binary image a first pixel blob with a second pixel blob to determine whether they represent matching symbols, including the steps of detecting a line in one blob not present in the other and/or determining if one of the blobs represents an italicized symbol where the other does not.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.