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Complex table and method for identifying handwritten numbers in complex table

A digital recognition, form technology, applied in the field of image recognition

Active Publication Date: 2017-02-15
BEIJING UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the deficiencies of the prior art, and proposes a method for recognizing complex structure forms and their internal handwritten numbers, which can solve the problem of engineering electronic handwritten forms and their internal number recognition and entry

Method used

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  • Complex table and method for identifying handwritten numbers in complex table
  • Complex table and method for identifying handwritten numbers in complex table
  • Complex table and method for identifying handwritten numbers in complex table

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Embodiment Construction

[0036] In order to make the technical solution and usage method of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0037] The invention provides a complex form and its internal handwritten number recognition method, such as figure 1 shown, including the following steps:

[0038] Step 1: Template table cell structure description;

[0039] 1-1. Line detection

[0040] The corner points in the table must form a line segment with the straight line. To do this, binarize this image and detect straight lines. Since the global Hough transform is affected by noise, the set of straight lines will be very messy, so the present invention adopts the cumulative Hough transform. Set the sliding window to , the step size to t, select an appropriate threshold, set the length of the shortest line segment to be detected, and perform Hough transform to obtain the line segment set. Judging whether ...

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Abstract

The invention discloses a complex table and a method for identifying handwritten numbers in the complex table. A complex template table is preprocessed by line detection and angular point detection to realize classified row and column ordering and obtain structural description of cells of the template table; after an electronic handwritten table is obtained, inclination of the electronic handwritten table is corrected, and the electronic handwritten table matches the template table to obtain cell position description thereof; each cell is processed by removing the edge and reserving characters in the cell as completely as possible; number images are extracted from the cells, and a trained classifier of a data set is used to identify the number images; and the handwritten characters are post-processed, and an identification result is filled into the template table. The method of the invention is easy to realize, and better in identification effect, and provides a good solution to automatic identification and table filling later.

Description

technical field [0001] The invention belongs to the field of image recognition, in particular to a complex form and a method for recognizing handwritten numbers inside it. Background technique [0002] Recognition of complex forms and their internal handwritten digits belongs to an important branch of image recognition applications. Due to the limitations of some factors, it is necessary to record data by handwriting, and then enter it into an electronic version for storage. The process of converting this recording method into an electronic version is the process of human brain understanding of images and computer recognition of images. If automatic recognition is used for recording, production efficiency will be improved, and it is widely used and demanded in production and life. [0003] For the table frame (called template table) composed of dense rows, columns or rows and columns combined and splitted made by Microsoft Excel (windows table tool) or Numbers For Mac (mac ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/62
CPCG06V30/412G06V30/293G06F18/285
Inventor 任柯燕李丹锦侯义斌赵雅丽武颖刘大亮
Owner BEIJING UNIV OF TECH
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