Method for overlaying Graphic of ELectronic Board and System therefor

摘要

The present invention relates to a graphic overlay method and a system of an electronic board, and more particularly, it is possible to change to VGA mode or NTSC mode, so that letters, figures, and graphics written on the touch screen are inputted and outputted not only on the VGA but also on the NTSC composite. The present invention relates to a graphic overlay method and a system for copying an electronic blackboard to be displayed on a touch screen. The touch screen 10, a PC 20 for displaying graphics drawn on the touch screen 10 on a VGA, and a PC 20. In the graphic overlay system of the copyboard consisting of a projector (30) to display a graphic appearing on the VGA on the touch screen (10); The PC 20 includes a smart board kernel 22 for converting the screen coordinates of the graphic drawn on the touch screen 10 into window coordinates, a mouse event handler 24 for image processing the graphic of the changed window coordinates, and And an OSD kernel 26 for converting the window coordinates of the imaged graphics into NTSC coordinates, and an OSD PIP board 28 for displaying the graphics of the NTSC coordinates on the NTSC composite, as well as lectures through the PC. The present invention relates to a graphic overlay method and a system of an electronic blackboard capable of recording lectures and recordings linked to multimedia equipment such as a VTR, a TV, and a real-time imager.