Identification method and identification device of handwritten mathematical formula

A technology of mathematical formulas and recognition methods, applied in the field of handwriting input methods, can solve the problems of lack of convenience and speed, user troubles, etc., and achieve the effect of reducing the number of inputs and increasing the input speed

Active Publication Date: 2013-08-21
HANVON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When this happens, the user cannot adjust the error, and can only rewrite the mathematical formula, especially when the input mathematical formula is large or complex, repeated input will bring great inconvenience to the user. trouble
Therefore, compared with the input method combining manual selection and keyboard typing, the existing handwritten mathematical formula input method does not have the embodiment of convenience and rapidity.

Method used

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  • Identification method and identification device of handwritten mathematical formula
  • Identification method and identification device of handwritten mathematical formula
  • Identification method and identification device of handwritten mathematical formula

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0094] Figure 4 It is a schematic diagram of the input handwriting of the mathematical formula displayed in the writing area in the second embodiment of the method for recognizing handwritten mathematical formula provided by the present invention. The mathematical formula the user wants to enter is a 1 1 , in step 201, the device acquires the input handwriting of a handwritten mathematical formula, and divides the input handwriting into several character blocks. Such as Figure 4 As shown, the input handwriting is divided into five character blocks, and the character blocks are represented by boxes in the figure.

[0095] In step 202, the recognition device recognizes the characters of each character block, and then splices the recognition candidate results of each character block to find out several combinations with higher scores as the recognition candidate results of the entire mathematical formula, and Display it in the candidate display area, assuming that the recogn...

example 2

[0123] This example also targets Figure 4 The input handwriting shown. The mathematical formula the user wants to enter is a 1 1 , in step 301, the input handwriting is divided into five character blocks.

[0124] In step 302, it is assumed that one of the recognition candidate results of the mathematical formula displayed in the candidate display area is: a11 .

[0125] In step 303, the user finds that the relative position recognition error of the characters "a" and "1" in the recognition candidate results, the user can select the character block 11 (i.e. the second character block of the present embodiment) and the character block 12 ( That is, the third character block in this embodiment) slides down to the right, and this gesture indicates that the character "1" should be the subscript of "a". The starting point of this operation is in character block 11 and the end point is in character block 12 . The recognition device acquires the starting point coordinates of the...

example 3

[0131] Figure 7 It is a schematic diagram of the input handwriting of the mathematical formula displayed in the writing area in the third embodiment of the handwritten mathematical formula recognition method provided by the present invention. The mathematical formula that the user wants to enter is In step 301, after the entire mathematical formula is written, the recognition device performs character block segmentation. Such as Figure 7 As shown, the input handwriting is divided into six character blocks, and the character blocks are represented by boxes in the figure. Since the root sign is presented as an outline number, this step divides the root sign and its contained content into a whole, and then separates the characters inside it one by one.

[0132] In step 302, the recognition device recognizes the characters of each character block, and then splices the recognition candidate results of each character block to find out several combinations with higher scores as...

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PUM

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Abstract

The invention discloses an identification method and an identification device of a handwritten mathematical formula and belongs to the technical field of handwriting input methods. The identification method includes obtaining the input handwriting of the handwritten mathematical formula and cutting the input handwriting into a plurality of character blocks; obtaining and displaying identification candidate results of the handwritten mathematical formula according to the identification results of the plurality of character blocks; adjusting the identification candidate results of the handwritten mathematical formula according to gesture operations of a user; and displaying a user-selected identification candidate result of the handwritten mathematical formula. According to the technical scheme of the identification method and the identification device of the handwritten mathematical formula, the user can adjust the identification candidate results of the handwritten mathematical formula through the gesture operations and does not need to rewrite the mathematical formula, so that the input speed of the user is increased greatly, and the number of the input of the user can be reduced.

Description

technical field [0001] The invention relates to the technical field of handwriting input methods, and more specifically, to a method and device for recognizing handwritten mathematical formulas. Background technique [0002] With the popularization and development of computers, the input technology of computers has also been greatly improved, which can meet the needs of operating users in most fields. In the field of mathematical formula input, the main input method is still the formula editor, which realizes the input of mathematical formulas or expressions by a combination of manual selection and keyboard typing. However, this input method through manual selection and keyboard input has slow input speed and low efficiency, and cannot meet the requirements of convenience and rapidity. Therefore, if handwriting input can be performed according to people's handwriting input habits, and can have a higher recognition accuracy rate, it is a direction for the development of hand...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/0488G06K9/68
Inventor 郭育生韦秋华毕芳邹明福
Owner HANVON CORP
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