Computer screen remote control method for medical image teaching system

Abstract

The invention relates to a computer screen remote control method for a medical image teaching system. A screen broadcasting system consists of a transmitting end and a receiving end. The transmitting end first performs gridding region cutting to a screen image to be transmitted and then performs screen data acquisition. Grids with changed data contents are screened out through a verifying algorithm. Network broadcasting transmission is performed to screened-out data by adopting a multithreading technology and by using a user datagram protocol (UDP). The receiving end monitors a control instruction transmitted by the transmitting end through a designated port and controls a receiving end computer so as to ensure screen broadcasting data to be correctly and received and displayed before activated by the transmitting end. When screen broadcasting is finished, automatic unlocking is performed, and a previous state of the computer is recovered. The computer screen remote control method effectively solves the problem that a large amount of system resources and network bandwidth are occupied when large data volume network broadcast transmission is performed, enables all of operation of a teacher on a teacher computer to be displayed on screens of student computers in real time.

Description

Technical field: [0001] The invention relates to a method for remotely accessing and controlling a computer based on a Windows operating system, and belongs to the technical field of computers. Background technique: [0002] Screen broadcasting refers to the real-time transmission and display of the screen display content of a certain computer to the screens of other computers in the computer local area network environment, so that users of other computers can watch and understand its operation in time. The real-time effect of screen broadcast playback is mainly related to the frame rate. The higher the frame rate, the smoother it is. Usually when the frame rate is lower than 24 frames per second, the human eye will feel lagging. However, the higher the frame rate, the greater the consumption of system resources and network bandwidth. At present, there are mainly the following methods for implementing screen broadcasting: [0003] Single frame encoding method. The workin...

AI Technical Summary

Problems solved by technology

The disadvantage is that because the collected screen image data is often relatively large, the resolution supported by most displays is very high (the resolution used by users is mostly 1024×768), so this method is used to process compressed images The consumption of CPU and the occupation of network bandwidth are very large

However, the disadvantage of this technology applied to demonstration teaching or video conferencing is that every data it collects is associated with previous data, so users who enter the system after the broadcast starts cannot see the current broadcast screen.

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