Implementation of an Automated Grading System for Formalized Answer Sheet Using EasyOCR (EasyOCR을 이용한 정형화된 객관식 답안지의 자동채점 시스템 구현)

Kim Chan (김찬); Yun Young-Sun (윤영선)

doi:10.29056/jsav.2023.06.05

Implementation of an Automated Grading System for Formalized Answer Sheet Using EasyOCR

Journal of Software Assessment and Valuation
Abbr : JSAV
2023, 19(2), pp.41-48
DOI : 10.29056/jsav.2023.06.05
Publisher : Korea Software Assessment and Valuation Society
Research Area : Engineering > Computer Science
Received : May 29, 2023
Accepted : June 20, 2023
Published : June 30, 2023

Kim Chan ¹, Yun Young-Sun ¹

¹한남대학교

Accredited

ABSTRACT

In this paper, we have developed an automated scoring system for structured formalized answer sheets composed of printed problem numbers and handwritten answers. In the initial stage, we performed gradient normalization to accurately recognize the problem numbers and answers, and subsequently applied the EasyOCR Framework for character recognition. Notably, we introduced a location correction algorithm to accurately detect the positions of numbers, thereby improving the detection rate from the original 70% to 100%. The number recognition model of EasyOCR originally had an accuracy of 89%, but we improved it to 93% through transfer learning. Experimental results showed that the implementation of an automatic scoring system using EasyOCR was feasible, and this system is expected to increase the efficiency of grading tasks in the educational field.

KEYWORDS

EasyOCR, Digit Recognition, Formalized Answer Sheets, Automated Grading, Transfer Learning

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* References for papers published after 2023 are currently being built.

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Journal of Software Assessment and Valuation 2023 KCI Impact Factor : 0.35

Implementation of an Automated Grading System for Formalized Answer Sheet Using EasyOCR

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Citation status

* References for papers published after 2023 are currently being built.

Journal of Software Assessment and Valuation 2023 KCI Impact Factor : 0.35

Implementation of an Automated Grading System for Formalized Answer Sheet Using EasyOCR

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KEYWORDS

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* References for papers published after 2023 are currently being built.