Method and device for recognizing test paper score

A recognition method and test paper technology, applied in character and pattern recognition, instruments, computer parts, etc., can solve the problems of error-prone, high cost, large manpower and material resources, and achieve accurate and efficient recognition, easy operation and simple structure. Effect

Inactive Publication Date: 2007-09-19
SHANGHAI UNIV
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

The former uses artificial methods to teach and process the scores of the test papers, which consumes a lot of manpower and material resources, is inefficient and prone to errors
The latter uses the principle of light reflection to scan and recognize the answer sheet, and requires a specific pen to scribble. Although it is widely used at present and has a high recognition rate, it requires fixed answer sheet styles and scribble tools, which is costly and difficult to implement in practical applications. The test paper has a single format and is only suitable for standardized test papers

Method used

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  • Method and device for recognizing test paper score
  • Method and device for recognizing test paper score
  • Method and device for recognizing test paper score

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Experimental program
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Effect test

Embodiment 1

[0047] The operation steps of the identification method of the paper surface score are as follows:

[0048] 1. Preprocessing steps before sample training:

[0049]Firstly, the region of interest (ROI) printed on the test paper is generated through a video capture card to generate an analog signal, and then converted into a 256-color digital signal by analog-to-digital conversion and input to the computer. The paper thickness, whiteness, smoothness, writing strength, quality of strokes, and the brightness and angle of the light during shooting will all cause changes in the shape of the characters, resulting in interference such as stains, whiteness, broken pens, and cross-linking. Therefore, generally, the digitized characters obtained by photographing still need various further processings.

[0050] The processing process includes 256-color conversion to grayscale image, binarization of grayscale image, edge sharpening and denoising, overall tilt adjustment of the number part...

Embodiment 2

[0144] Referring to Fig. 9, the examination paper surface score recognition device adopts the above-mentioned test paper surface score recognition method for operation and use, and includes a table 8 for placing the test paper 9, and 4 adjustable columns 5 are set on the table 8 to support a piece with the table 8 The upper panel 1 arranged in parallel; the upper panel 1 is equipped with: a camera 2 aimed at the score of the test paper 9, a laser light 3 illuminating the score area of ​​the test paper 9 and 4 auxiliary lights to illuminate the test paper 9; the camera 2. Connect a computer 7 via the data acquisition card 6. The camera 2 acquires the image of the score area on the test paper surface 9, and sends it to the computer 7 through the data acquisition card 6, and the computer 7 processes the image and recognizes the score, and generates a report.

[0145] The operation steps of this device are as follows:

[0146] (1) Place the test paper 9 to be identified on the ta...

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Abstract

The invention is related to an examination paper score identification method and apparatus, the method is realized by identifying the script handwriting of the score through a multi-layer perception network and which involves the study training process and identification process, the apparatus includes a desktop for placing the test paper, an upper panel being parallel to the desktop supported by 3-4 adjustable columns, wherein a pick-up head aiming at the test paper score, a laser lamp radiating the score region and 1-4 auxiliary lamps illuminating the test paper are provided on the upper panel, and the pick-up head is connected with a computer. The apparatus is easy to construct and convenient in operation, it can identify the handwritten scores of the test papers accurately and efficiently, thereby capable of meeting with the demand of realistic application.

Description

technical field [0001] The invention relates to a method and device for recognizing handwritten digits, in particular to a method and device for recognizing test paper scores. Background technique [0002] The methods for processing test paper scores in the teaching process can be divided into two categories, one is manual processing, and the other is scanning answer sheets by using the principle of light reflection. The former uses artificial methods to teach and process the scores of the test papers, which consumes a lot of manpower and material resources, is inefficient and prone to errors. The latter uses the principle of light reflection to scan and recognize the answer sheet, and requires a specific pen to scribble. Although it is widely used at present and has a high recognition rate, it requires fixed answer sheet styles and scribble tools, and the cost is high. It is not easy to implement in practical applications. The test paper has a single format and is only sui...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/66G06K9/20
Inventor 薛雷彭之威冯运亮
Owner SHANGHAI UNIV
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