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Online handwritten mathematical formula recognition method based on bidirectional Tree-GRU

A technology of mathematical formulas and recognition methods, applied in digital ink recognition, character and pattern recognition, computer parts, etc., can solve problems such as difficult recognition of mathematical formulas with two-dimensional structures, and achieve the goal of improving recognition accuracy and recognition efficiency Effect

Active Publication Date: 2020-03-27
GUANGDONG UNIV OF TECH
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Problems solved by technology

[0004] In order to solve the problem that existing handwriting recognition methods are difficult to recognize mathematical formulas with two-dimensional structure, the present invention provides an online handwritten mathematical formula recognition method based on bidirectional Tree-GRU

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  • Online handwritten mathematical formula recognition method based on bidirectional Tree-GRU
  • Online handwritten mathematical formula recognition method based on bidirectional Tree-GRU
  • Online handwritten mathematical formula recognition method based on bidirectional Tree-GRU

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Embodiment Construction

[0034] The accompanying drawings are for illustrative purposes only and cannot be construed as limiting the patent;

[0035] In order to better illustrate this embodiment, some parts in the drawings will be omitted, enlarged or reduced, and do not represent the size of the actual product;

[0036] For those skilled in the art, it is understandable that some well-known structures and descriptions thereof may be omitted in the drawings.

[0037] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0038] The present embodiment provides a kind of online handwritten mathematical formula recognition method based on two-way Tree-GRU, such as figure 1 shown, including the following steps:

[0039] S1. Obtain the input online handwritten mathematical formula data, including the stroke information InkML file of the formula and the stroke level relationship graph SLG file of the formula;

[0...

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Abstract

The invention discloses an online handwritten mathematical formula recognition method based on a bidirectional Tree-GRU. The method comprises the following steps: extracting a two-dimensional tree diagram of a handwritten mathematical formula, and carrying out the formula recognition of the two-dimensional tree diagram through a bidirectional single-hidden-layer Tree-GRU network; wherein the two-dimensional tree diagram is extracted according to different rules, a bidirectional single-hidden-layer Tree-GRU network is correspondingly trained to generate a corresponding classifier, and all nodesand edges can be more accurately covered by a multi-tree fusion strategy than a strategy of only extracting a single tree. According to the method, a handwritten formula does not need to be segmented, the adopted Tree-GRU network can allow information to be transmitted through a tree structure, and compared with a common one-dimensional network structure, more two-dimensional structures of the handwritten mathematical formula can be learned. According to the method, the recognition precision and the recognition efficiency of the online handwritten mathematical formula are improved.

Description

technical field [0001] The invention relates to the technical field of online handwritten mathematical formula recognition, in particular to a bidirectional Tree-GRU-based online handwritten mathematical formula recognition method. Background technique [0002] Nowadays, it has become a common habit for people to use handwriting as an input method for mobile devices, and handwriting recognition is closely related to people's daily life. Improving the recognition rate of handwriting recognition in various scenarios is of great significance for improving people's work efficiency. Mathematical symbols occupy an important position in scientific literature and are a necessary means to describe problems and theories in many fields such as mathematics and physics. [0003] The recognition of mathematical formulas is different from the recognition of ordinary numbers. The diversity of mathematical symbol categories and the complexity of the two-dimensional structure of mathematical...

Claims

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Application Information

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IPC IPC(8): G06K9/00G06K9/62
CPCG06V30/333G06V30/36G06F18/24G06F18/214Y02D10/00
Inventor 郑恩东刘立程
Owner GUANGDONG UNIV OF TECH
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