Recognition processing method and device for answer sheet

Abstract

The invention provides a recognition processing method for an answer sheet. The method comprises the following steps: performing recognition and processing on answer sheet sample test paper filled with standard answers, and obtaining answer sheet template data and standard answer code stream; scanning an answer sheet to be scanned and obtaining an answer sheet image, performing real-time coarse positioning based on linear superposition and affine transformation and correction processing on the answer sheet image, and performing real-time accurate positioning based on local feature matching andcorrection processing; performing multi-scale recognition processing based on an adaptive threshold on the image subjected to accurate positioning and correction processing, so as to obtain code stream of filled information on the answer sheet; and matching the code stream of the filled information on the answer sheet with the standard answer code stream, and accurately outputting review results.Correspondingly, the invention further provides a recognition processing device for the answer sheet. The method has the advantages that the answer card can be accurately positioned, single choices,multiple choices and indefinite choices can be recognized and processed, and the recognition precision is high.

Description

technical field [0001] The invention relates to the technical field of recognition processing, in particular to a method and device for recognition processing of answer sheets. Background technique [0002] In the face of various types of assessments and examinations, many teachers are burdened with heavy marking tasks, which not only affects the work efficiency of teachers, but also prolongs the assessment cycle and weakens the evaluation significance of assessments and examinations. The intelligent identification of the answer sheet can not only accurately, quickly and conveniently realize the automatic identification and evaluation of the students' test papers, but also monitor and view the evaluation results, and can greatly reduce the workload of teachers in marking papers. While improving the work efficiency of teachers, the evaluation cycle is shortened, and the real-time closed-loop of student evaluation and learning is strengthened. [0003] At present, in the proc...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiencies of the prior art, the present invention provides a method and device for identifying and processing answer sheets, which can accurately locate answer sheets, and identify and process single-choice questions, multiple-choice questions, and indefinite-choice questions, etc. , with high recognition accuracy, which solves the technical problems of small filling area, incomplete alteration, multiple selection and other complex technical problems in the answer sheet

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