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Method for marking examination papers based on image grayscale recognition and processing

An image grayscale and recognition processing technology, applied in the field of image processing, can solve problems such as errors, unfairness, and inability to fully reflect the normal level of the test, and achieve the effect of easily distinguishing, reducing manpower and time, and ensuring the accuracy of marking

Active Publication Date: 2016-07-13
武汉颂大教育技术有限公司
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has the fastest processing speed, and the image format (storage size) is the smallest, because all kinds of interference colors are processed in black and white. During the processing, errors are likely to occur, resulting in the result of marking the test being unable to fully reflect the normal level of the test. , unfair

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  • Method for marking examination papers based on image grayscale recognition and processing
  • Method for marking examination papers based on image grayscale recognition and processing

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Embodiment Construction

[0033] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0034] Such as figure 1 As shown, a flow chart of a marking method based on image grayscale recognition and processing includes the following steps:

[0035] Step 1: Carry out image scanning on the test paper to obtain the test paper image picture, wherein, the test paper image picture contains a plurality of filled black dots;

[0036] Step 2: Carry out grayscale recognition processing on the black dots filled in the image of the test paper to find out the normal black dots filled in;

[0037] Step 3: Judging whether the corresponding answer is correct according to the normal filled black dots, and scoring according to the preset scoring rules until all the normal filled black dots are scored, and the processing f...

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Abstract

The invention relates to a method for marking examination papers based on image grayscale recognition and processing. The method comprises the steps of carrying out image scanning for examination papers, and acquiring examination image graphics in which a plurality of filled block dots are included; carrying out grayscale recognition for the filled block dots in the examination image graphics, and finding out normal filled black dots; and determining whether corresponding answers are correct according to the normal filled black dots, scoring according to preset scoring rules until all the normal filled black dots are scored, and ending the processing flow. The invention can accurately recognize the filled black dots of students, can easily distinguish abnormal filled black dots, ensures the efficiency of marking the examination papers under the premise of ensuring the accuracy, reduces a great amount of manpower and time, and also reduces unnecessary deduction of the student due to irregular filling to the greatest extent.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a marking method based on image grayscale recognition and processing. Background technique [0002] With the development of education, computer marking is becoming more and more popular. Due to the relatively high efficiency of computer marking, it can replace a large amount of manual labor, so it has been widely promoted. However, due to multiple reasons such as image transmission, compression, processing efficiency, and visibility, common images for marking are black and white images, and existing online reading products only support black and white scanning. The image format scanned in this way is TIF format. There are only black and white, and a pixel can be represented by only one binary bit, that is, 0 means black and 1 means white. It has the fastest processing speed, and the image format (storage size) is the smallest, because all kinds of interference colors a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/32
CPCG06V10/25
Inventor 徐春林廖华清
Owner 武汉颂大教育技术有限公司