Answer sheet full-filling identification method and system

A recognition method and answer sheet technology, which are applied in character and pattern recognition, image data processing, instruments, etc., can solve the problems of inaccurate identification of answer sheets, offset of picture positions of answer sheets, affecting the development of answer sheet technology, etc. Wide range of effects, increased flexibility and efficiency

Active Publication Date: 2017-12-22
武汉天量数据技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to objective factors such as paper thickness, paper humidity, static electricity affecting paper scanning, and inaccurate scanner equipment, the scanned answer card pictures often have technical problems such as po

Method used

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  • Answer sheet full-filling identification method and system
  • Answer sheet full-filling identification method and system
  • Answer sheet full-filling identification method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A method 100 of answer sheet filling and identification, such as figure 1 shown, including:

[0054] Step 110, obtaining the scanned picture of the answer sheet of the answerer.

[0055] Step 120, according to the first baseline frame, the first parameter information and the Cartesian coordinate system of the answer sheet, determine the second baseline frame corresponding to the first baseline frame in the scan image and the second parameter information of the scan image.

[0056] Step 130, according to the first parameter information, the second parameter information and the Cartesian coordinate system, determine the coordinate offset coefficient of the second baseline frame relative to the first baseline frame.

[0057] Step 140, according to the coordinate offset coefficient and the first parameter information, determine the coordinate values ​​of the boundary points of all the filled grids in the scanned image.

[0058] Step 150 , according to the coordinate value...

Embodiment 2

[0063] On the basis of Example 1, as figure 2 As shown, before step 110, method 100 also includes:

[0064] Step 160, establish the reference map corresponding to the answer sheet, and determine the Cartesian coordinate system, the first baseline frame in the reference map, and the first parameter information of the reference map.

[0065] Step 170, save the Cartesian coordinate system, the first baseline frame and the first parameter information.

[0066] Among them, the reference image is the first rectangle; the first baseline frame is the second rectangle, and the upper boundary line, lower boundary line, left boundary line and right boundary line of the second rectangle correspond to the upper boundary line and lower boundary line of the first rectangle respectively. , the left boundary line is parallel to the right boundary line, and the second rectangle is located inside the first rectangle; the first parameter information includes the coordinate values ​​of the four ...

Embodiment 3

[0070] On the basis of Example 2, such as image 3 As shown, step 120 includes:

[0071] Step 121, identify the binarized scanned image row by row or column by column, determine the first ratio of the maximum number of continuous black dots in each row or column to the total number of pixels and the total number of black dots to the total number of pixels The second ratio of the total number.

[0072] Step 122, comparing the size of the first ratio with the first threshold and the size of the second ratio with the second threshold, when the first ratio is greater than the first threshold and the second ratio is greater than the second threshold, then determine that the row or column is the baseline The bounding line of the box.

[0073] Step 123: When the number of determined boundary lines is two, the recognition of the second baseline frame is completed; when the number of determined boundary lines is less than two and the binarized scanned image is not rotated according t...

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Abstract

The present invention relates to an answer sheet full-filling identification method and system. The method comprises: obtaining a respondent's answer sheet scintigram; determining a second baseline frame corresponding to a first baseline frame in the scintigram and second parameter information of the scintigram according to the first baseline frame, the first parameter information and a rectangular coordinate system of the answer sheet; according to the first baseline frame, the first parameter information and the rectangular coordinate system, determining coordinate offset coefficients of the second baseline frame relative to the first baseline frame; according to the coordinate offset coefficients and the first parameter information, determining the coordinate values of the boundary points of all the full-filling grids; and according to the coordinate values and the first parameter information, performing full-filling identification of all the full-filling grids. One baseline frame is set for a reference map, the reference map is employed to perform coefficient calculation for the offset phenomenon, and the coordinates of points in the reference map are mapped into the scintigram to perform full-filling identification according to the offset coefficients so as to realize accurate identification of an answer sheet, enlarge the application range, greatly improve the flexibility and efficiency of the answer sheet application.

Description

technical field [0001] The invention relates to the field of answer sheet computer application technology, in particular to an answer sheet filling and identification method and system. Background technique [0002] The answer sheet is a commonly used answering medium and means in the examination. Through the answer sheet, the machine can quickly scan and identify to obtain objective test scores, so as to achieve the purpose of high-speed marking. [0003] Answer sheets have been used in testing activities for many years. Currently commonly used answer sheet applications usually use a device called a cursor reader to scan the answer sheet and obtain score data. Before the answer sheet is used, coordinate position anchor points must be set on the side or top of the answer sheet filling area, so that the cursor reader can locate the position to be identified. The cursor reader has high requirements on the paper quality of the answer card, and ordinary printing paper cannot ...

Claims

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Application Information

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IPC IPC(8): G06K9/32G06T7/30
CPCG06T7/30G06T2207/10008G06V10/245G06V10/25
Inventor 余江健余江杰
Owner 武汉天量数据技术有限公司
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