Guiding information-based superposing devices for course videos

The ability of distance-education students to follow lectures largely depends the time it takes for them to respond to the visual information on the screen. By increasing the intensity of visual stimulation of the guiding information, the response time can be effectively shortened. IR Cameras fitted with special colored filters can be used as the optical-to-electrical (O/E) converter. By detecting the resolution of VGA signals, the electronic images of the guiding light spot can be interpolated to synchronize with the resolution of the information on the screen. The signals of the two electronic images - the guiding light spot and the information on the screen - can undergo keying with the digital key control technology to produce electronic images with the guiding information superposed on the information on the screen. At this moment, no guiding information-based superposing device for course videos is commercially available. Thus, it may be advisable for manufacturers in the related industry to develop a course recording device that serves this purpose.