Projection screen annotation method and system

Abstract

The invention discloses a projection screen annotation method and system. The method comprises the following steps of: dividing a first terminal into a plurality of canvas layers which comprise a first canvas layer and a second canvas layer; obtaining coordinate information in real time, drawing a first annotation handwriting on the first canvas layer according to the coordinate information, directly displaying the first annotation handwriting, and simultaneously transmitting the coordinate information to a second terminal through a network; converting the coordinate information to obtain coordinate conversion information, and drawing a second annotation handwriting in the second terminal according to the coordinate conversion information; obtaining and storing a screenshot image of the current screen on the second terminal, transmitting the screenshot image to the first terminal by the network, and displaying the screenshot image on the second canvas layer; and erasing the first annotation handwriting drawn on the first canvas layer, and displaying the screenshot image of the first terminal. According to the method and system disclosed by the invention, the problem of inconvenient operation caused by annotation handwriting display lag due to the influences of wireless environment and hardware resource is solved, so that the users cannot feel the bluntness of the writing and then the user experience is enhanced.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a screen projection method and system for commenting. Background technique [0002] In the modern classroom, multimedia interactive teaching is an important part of the modern classroom. Multimedia interactive teaching mainly forms a teaching resource stream by compressing the video and audio streams of the teacher's teaching site and synchronously browsing courseware commands, and transmits them to remote students' computers in real time through the network. Students can raise their hands in time to ask questions, share teacher-side programs, Text communication and other means to achieve interactive teaching. Such as the following scenarios: students use e-books, laptops, tablets, mobile terminals, etc. to obtain teaching courseware and classroom assignments, and submit assignments on the spot, and even submit their own learning progress for teachers to arrange; studen...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a screen-casting annotation method and system, which solves the problem of inconvenient operation due to the lag of display annotation notes caused by the influence of wireless environment and hardware resources, so that users can not feel the slowness of writing, and improve user experience sense

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