Paper engineering drawing homework marking device and method thereof

Abstract

The invention relates to a paper engineering drawing homework marking device and method, the device comprises a shooting module and a picture processing module which are connected in sequence, and the method comprises the following steps: S1, obtaining a homework photo corresponding to a paper engineering drawing homework through the shooting module, and transmitting the homework photo to the picture processing module; and S2, the picture processing module performs preprocessing, positioning, binaryzation, small-area model matching and label rendering operations on the job picture in sequence to obtain a job picture with rendered colors, namely, the marking of the paper engineering drawing job is completed. Compared with the prior art, the invention has the advantages that the paper engineering drawing is automatically and accurately read, the time of correcting the paper engineering drawing work by a teacher is saved, the automation level of engineering drawing teaching is improved, and in addition, good real-time feedback can be generated for a learner.

Description

technical field [0001] The invention relates to the technical field of paper-based engineering drawing operation automatic marking, in particular to a paper-based engineering drawing operation reviewing device and method thereof. Background technique [0002] In traditional engineering drawing teaching, students need to understand their own problems after practicing and drawing paper engineering drawings. At the same time, teachers also need to review students' paper engineering drawing assignments. [0003] However, due to the increase in the amount of homework for students, the workload of reviewing homework for teachers will also increase accordingly, resulting in a negative impact on the efficiency and quality of homework reviewing. On the other hand, it is difficult for students themselves to accurately know the accuracy of homework. Therefore, it is necessary to develop an intelligent device that can assist in job review. Chinese patent CN201510776179 proposes a method...

AI Technical Summary

Problems solved by technology

[0003] However, due to the increase in the amount of homework for students, the workload of reviewing homework for teachers will also increase accordingly, resulting in a negative impact on the efficiency and quality of homework reviewing. On the other hand, it is difficult for students themselves to accurately know the accuracy of homework. Therefore, it is necessary to develop an intelligent device that can assist in job review. Chinese patent CN201510776179 proposes a method and system for intelligent review of engineering drawing operations based on three-dimensional reconstruction, which is essentially based on the AutoCAD software platform. Reconstruct the stereogram, extract key data from the stereogram, and finally compare the information with the standard answer database. On the one hand, this method is more complicated to operate, and on the other hand, it also depends on the accuracy of the stereogram reconstruction program. It will inevitably lead to a decrease in the accuracy of subsequent information comparisons. In addition, this method is only applicable to the electronic version of the engineering drawing operation, and cannot adapt to the paper engineering drawing operation. Users cannot intuitively know where there are problems in the operation

Images