METHOD OF IDENTIFYING PAGE FROM PLURALITY OF PAGE FRAGMENT IMAGES
First Claim
1. A method of identifying a physical page containing printed text from a plurality of page fragment images captured by a camera, said method comprising:
- placing a handheld electronic device in contact with a surface of the physical page, said device comprising a camera and a processor;
moving the device across the physical page and capturing the plurality of page fragment images at a plurality of different capture points using said camera;
measuring a displacement or direction of movement;
performing OCR on each captured page fragment image to identify a plurality of glyphs in a two-dimensional array;
creating a glyph group key for each page fragment image, said glyph group key containing n×
m glyphs, where n and m are integers from 2 to 20;
looking up each created glyph group key in an inverted index of glyph group keys;
comparing a displacement or direction between glyph group keys in said inverted index with a measured displacement or direction between the capture points for corresponding glyph group keys created using said OCR; and
identifying a page identity corresponding to said physical page using said comparison.
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Accused Products
Abstract
A method of identifying a physical page containing printed text from a plurality of page fragment images captured by a camera. The method includes the steps of: placing a handheld electronic device in contact with a surface of the physical page; moving the device across the physical page and capturing the plurality of page fragment images at a plurality of different capture points; measuring a displacement or direction of movement; performing OCR on each captured page fragment image; creating a glyph group key for each page fragment image; looking up each created glyph group key in an inverted index of glyph group keys; comparing a displacement or direction between glyph group keys in the inverted index with a measured displacement or direction between the capture points for corresponding glyph group keys created using OCR; and identifying a page identity corresponding to the physical page using the comparison.
13 Citations
14 Claims
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1. A method of identifying a physical page containing printed text from a plurality of page fragment images captured by a camera, said method comprising:
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placing a handheld electronic device in contact with a surface of the physical page, said device comprising a camera and a processor; moving the device across the physical page and capturing the plurality of page fragment images at a plurality of different capture points using said camera; measuring a displacement or direction of movement; performing OCR on each captured page fragment image to identify a plurality of glyphs in a two-dimensional array; creating a glyph group key for each page fragment image, said glyph group key containing n×
m glyphs, where n and m are integers from 2 to 20;looking up each created glyph group key in an inverted index of glyph group keys; comparing a displacement or direction between glyph group keys in said inverted index with a measured displacement or direction between the capture points for corresponding glyph group keys created using said OCR; and identifying a page identity corresponding to said physical page using said comparison. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification