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Answer sheet character string recognition method and device, terminal and computer storage medium

A recognition method and string technology, applied in the field of image processing, can solve the problems of low efficiency, easy to be interfered by noise, unable to realize intelligent recognition, etc., and achieve the effect of improving recognition efficiency and high environmental cost.

Pending Publication Date: 2021-03-16
ZICT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the QR code is blurred, the positioning point is covered or there are strokes around it, it is difficult to recognize;
[0005] 2. The method of judging the position of the examination number based on the identification positioning point is inefficient and susceptible to noise interference, which affects the accuracy of identification
At present, various educational technology companies generally use image processing and pattern recognition methods for answer sheet recognition, and have developed many answer sheet recognition systems, but still use traditional recognition methods, which cannot fundamentally break through the bottleneck of image processing methods. Completely intelligent identification cannot be realized due to automatic processing;
[0006] 3. Examination number identification By filling in the number area of ​​the examination number, the corresponding number is determined by the positioning block. In different areas and different schools, the number of examination numbers is different, which will cause the answer sheet to be not universal

Method used

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  • Answer sheet character string recognition method and device, terminal and computer storage medium
  • Answer sheet character string recognition method and device, terminal and computer storage medium
  • Answer sheet character string recognition method and device, terminal and computer storage medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Such as figure 1 As shown, the answer sheet string recognition method according to an embodiment of the present invention includes: step S102, performing text recognition on the answer sheet image, obtaining text content information and text position information; step S104, according to the text content information and text position information The information locates the character string to be recognized, so as to determine the area where the character string is located; step S106, identify the area where the character string is located based on the deep learning model, so as to obtain the character string.

[0055] In this embodiment, relying on text recognition technology, the text position information is recorded while acquiring the text content, and the position information is used to locate the character string to be recognized. Once the position of the character string to be recognized (target character string) is determined region, the image of the region can be...

Embodiment 2

[0066] Such as figure 2 As shown, the answer sheet string recognition method according to another embodiment of the present invention includes: step S202, inputting a blank answer sheet picture; step S204, performing OCR recognition; step S206, locating the test number according to the text information area; step S208, input the answer sheet picture, and intercept the test number area sub-image; step S210, perform horizontal projection and vertical projection on the test number area sub-image to obtain the rectangular coordinates of each test number frame; step S212, deep learning model recognition test No.

[0067] In this embodiment, the blank answer sheet is first analyzed to obtain the position information of the character string (test number) to be recognized, and the image of the character string area can be directly selected in the filled answer sheet according to the position information. Step S210 determines the frame line coordinates of the character string by mean...

Embodiment 3

[0069] Combine below Figure 3 to Figure 11 The method for identifying the character string of the answer sheet according to Embodiment 2 is specifically described:

[0070] 1. Input blank answer sheet image empty_img (see Figure 10 , Figure 10 It is a screenshot of a blank answer sheet), perform OCR recognition, and obtain the text information text_list containing coordinates;

[0071] The text information is as follows:

[0072] [[",[35,11,50,35]]]

[0073] [['(A total of 23 questions with a total score of 150 points)',[467,245,247,24]]]

[0074] [['Name:Class:',[84,296,596,24]]]

[0075] [['Ticket number:',[84,369,119,25]]]

[0076] [['1. Please fill in the candidate's name, class and admission ticket number before answering the question',[167,577,500,25]]]

[0077] [['Note',[101,610,38,23]]]

[0078] [['Ja∣2. The test admission ticket number must be filled in the boxes, and each box must be filled with a number',[101,626,668,35]]]

[0079] [['Hui∣3. Multiple cho...

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Abstract

The invention provides an answer sheet character string recognition method and device, a terminal and a computer readable storage medium, and the method comprises the steps: carrying out the text recognition of an answer sheet image, and obtaining text content information and text position information; positioning a character string to be identified according to the text content information and the text position information so as to determine an area where the character string is located; and identifying an area where the character string is located based on a deep learning model to obtain thecharacter string. According to the technical scheme, the position information of the target character string in the answer sheet is obtained through the text recognition technology, a positioning block is not needed for positioning, the answer sheet can be compatible with various forms of answer sheets, horizontal projection and vertical projection are conducted on an image area where the targetcharacter string exists. The position of each character in each character string is obtained so as to carry out accurate identification, the anti-interference capability is strong, and the identification rate is high.

Description

technical field [0001] The present invention relates to the field of image processing, in particular to an answer sheet character string identification method, an answer sheet character string identification device, a terminal and a computer-readable storage medium. Background technique [0002] With the rapid development of computers and artificial intelligence, it is gradually applied to many fields of work and life. In the process of education and teaching, examination is an effective way to evaluate teaching results. After an examination is completed, teachers will review a large number of student test papers and conduct a summary analysis of all students after review. Traditional marking and analysis work It will take up a lot of time for teachers, and even reduce the teacher's lesson preparation time, so the related technology of computer intelligent marking has appeared, and this marking method can greatly save teachers' marking time. At present, the existing marking...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/32G06N3/04
CPCG06V30/413G06V20/62G06V30/10G06N3/045
Inventor 曾志辉邢军华欧阳一村许文龙贺涛
Owner ZICT TECH CO LTD
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