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A Processing Method for Improving the Correct Rate of Image Recognition of Answer Sheets

An image recognition and processing method technology, applied in the field of image processing, can solve problems such as image blur, image noise, image destruction, etc., to improve the accuracy rate, reduce noise, and enhance the effect of students filling in the painted part.

Active Publication Date: 2021-10-26
HANGZHOU STRONG NETWORK TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] 1. The image is blurred
[0010] 2. Image noise
[0011] 3. Image destruction

Method used

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  • A Processing Method for Improving the Correct Rate of Image Recognition of Answer Sheets

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Embodiment Construction

[0034] The specific embodiments of the present invention are given below in conjunction with the accompanying drawings, but the present invention is not limited to the following embodiments. Advantages and features of the present invention will be apparent from the following description and claims. It should be noted that all the drawings are in very simplified form and use imprecise ratios, which are only used for the purpose of conveniently and clearly assisting in describing the embodiments of the present invention.

[0035] Please refer to figure 1 , figure 1 Shown is a flow chart of a processing method for improving the accuracy of answer card image recognition in a preferred embodiment of the present invention. The present invention proposes a processing method for improving the accuracy rate of answer card image recognition, comprising the following steps:

[0036] Step a, obtaining the grayscale histogram of the answer sheet image;

[0037] Step b, setting the midd...

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Abstract

The present invention proposes a processing method for improving the correct rate of answer card image recognition, comprising the following steps: step a, obtaining the gray scale histogram of the answer card image; Decrease the gray value by the set value, and at the same time increase the gray value of pixels greater than the median value by the set value; step c, stretch the gray histogram; step d, judge whether there are pixels in the target interval after processing ; Step e, when no pixel appears, judge whether the number of times of processing in step b reaches the set value, and stop processing if it has reached the set value; step f, when no pixel appears in the target interval, and the number of times of processing in step b has not yet When the set value is reached, return to step b for further processing; step g, stop processing when a pixel appears in the target interval. The invention can effectively reduce the noise of the answer card image and improve the correct rate of the answer card image recognition.

Description

technical field [0001] The invention relates to the field of image processing, and in particular to a processing method for improving the correct rate of image recognition of answer sheets. Background technique [0002] In recent years, with the continuous upgrading and development of information technology, the use of mobile terminal equipment has become more and more popular, and more convenient, efficient and efficient work and learning methods have become more and more popular. In the traditional field of education, a new generation of educational informatization upgrades has been gradually explored. At the current stage of basic education in China, the main forms of examination of students' learning status are still various types of examinations, ranging from the college entrance examination and the high school entrance examination, to the daily homework of grass-roots teachers, unit examinations, and various mid-term and final examinations, college entrance examination...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/20
CPCG06V10/225
Inventor 虞陆平魏巧宝张斌台跃华
Owner HANGZHOU STRONG NETWORK TECH