Methods and systems for processing of images of mathematical expressions
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United States of America Patent
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Jan 2, 2018
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N/A
app pub date -
Apr 6, 2015
filing date -
Sep 2, 2014
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Abstract
The current document is directed to methods and systems that convert document images containing mathematical expression into corresponding electronic documents. In one implementation, an image or sub-image containing a mathematical expression is recursively partitioned into blocks separated by white-space stripes. Horizontal and vertical partitioning are alternately and recursively applied to the image or sub-image containing a mathematical expression until the lowest-level blocks obtained by partitioning correspond to symbols recognizable by character-recognition methods. Graph-based analysis of the recognized symbols provides a basis for encoding an equivalent representation of the mathematical expression contained in the image or sub-image.
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