Answer sheet correction method and device, electronic equipment and storage medium

Abstract

The invention provides an answer sheet correction method and device, electronic equipment and a storage medium, and the method comprises the steps: scanning a blank answer sheet, recording paper surface positioning block information and question coordinate information, and storing an answer sheet template in a database; scanning the answered answer sheet, processing the answered answer sheet imageaccording to answer sheet template information, and screening out a rectangular contour meeting a predetermined condition as a positioning block; correcting the answered answer sheet image accordingto the position of the positioning block; extracting key points of a selected question area in the answered answer sheet image and the answered answer sheet template image respectively, and performinglocal correction on the answered answer sheet according to a matching relationship between the key points; and identifying option filling of the selected questions in the answered answer sheet, and recording an option filling identification result and student information. Global and local correction can be accurately carried out on the answer sheet, and the accuracy of subsequent positioning andrecognition of the answer sheet is guaranteed.

Description

technical field [0001] The invention relates to the field of image processing, in particular to an answer card correction method, device, electronic equipment and storage medium. Background technique [0002] Through the intelligent scanning and analysis of the answer sheet, it is possible to identify the students’ filling and teacher’s marking on the answer sheet, and to correct and eliminate the skew and distortion in the scanning of the paper answer sheet, so as to facilitate subsequent online review. Accurate scanning and correction of answer sheets plays an important role in subsequent identification and judgment and topic cutting, and is the basis of digital precision teaching. [0003] At present, the correction of the answer sheet is mainly based on the marking on the test sheet. For example, when printing, black squares are designed at the four corners of the answer sheet as a correction mark, and the tilt and offset of the picture are calculated by identifying the ...

AI Technical Summary

Problems solved by technology

[0004] In view of this, the embodiment of the present invention provides an answer sheet correction method, device, electronic equipment and storage medium, to solve the existing correction method in the scanner When the mechanical device itself is worn out or the paper is bent, etc., the problem of inaccurate positioning and identification is caused

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