No-shielding processing method of teaching blackboard writing words

Abstract

The invention discloses a no-shielding processing method of teaching blackboard writing words. The method comprises the steps of firstly, acquiring original recorded video information which is the video information in recording a blackboard; secondly, extracting a blackboard area in the recorded video information and extracting an effective edge; thirdly, performing perspective transformation on the blackboard area and solving a transformation matrix; fourthly, converting original picture information according to the transformation matrix for obtaining blackboard area picture information; andfinally, performing no-shielding processing on the blackboard area picture information. Through extracting the effective edge in the method, after perspective transformation and no-shielding processing, clearing processing can be performed on the recorded video information so that the recorded video can be transformed to a whole and clear blackboard screen. Furthermore a hand and other blocking members in the blackboard screen video information can be eliminated, thereby facilitating clear studying of the students. A good studying experience environment is created for the students without influence to studying.

Description

technical field [0001] The invention belongs to the field of information processing, and relates to recording video information, in particular to a non-blocking processing method for teaching blackboard writing. Background technique [0002] In the traditional teaching process, the general teacher conducts blackboard teaching on the blackboard. This traditional method cannot store and share blackboard information; and the existing multimedia classrooms are equipped with a set of projectors to project and display courseware for teaching. Projectors are currently widely used in homes, offices, schools and entertainment venues, depending on the working method. , There are different types such as CRT, LCD, DLP, etc.; and currently, projectors are often used in the teaching process; and with the development of Internet information, teaching videos are often recorded and uploaded to the Internet for sharing, so as to share with learners Review. [0003] After the existing teachi...

AI Technical Summary

Problems solved by technology

This traditional method cannot store and share blackboard information; and the existing multimedia classrooms are equipped with a set of projectors to project and display courseware for teaching. Projectors are currently widely used in homes, offices, schools and entertainment venues, depending on the working method. , There are different types such as CRT, LCD, DLP, etc.; and currently, projectors are often used in the teaching process; and with the development of Internet information, teaching videos are often recorded and uploaded to the Internet for sharing, so as to share with learners review

[0003] After the existing teaching video is recorded, the recorded video is usually blocked by the shooting angle or the teacher's arm when it is uploaded through the network, resulting in partial occlusion of the video, which affects the experience of the learners. and have a certain impact on learning;

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