Compression of digital images of scanned documents
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United States of America Patent
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Mar 31, 2015
Grant Date -
Jun 26, 2014
app pub date -
Dec 23, 2013
filing date -
May 4, 2007
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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.
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