"Virtual And Reality Combination" Graphic Studio System Design And Implementation

Graphic titles and graphics technology occupies an important place in the broadcast television industry development. Television production and broadcast graphics systems based on computer technology at home and abroad have been 15-20 years, which generally experience a simple 2D titles,2D graphics with a sense of movement and touching, high quality 2D and 3D graphics complete integration, and several stages. The applications of graphics titles system cover all aspects of the television programs, including live news programs, studio interview programs, performances, sports programs, financial information programs, meteorological geographic programs as well as films and television shows production and broadcast applications as well as the live broadcast,post-production occasion, editor application domain, studio and broadcast television production line, which have played a tremendous role in TV programs effect.Currently, the TV graphics devices at home and abroad for the broadcasting TV industry users (mainly television network also including other industry engaged in video program production users) mainly can be divided into graphics titles systems and virtual studio systems two different application modes. The graphics title systems generally appear on the front of the TV screen to increase the amount of information, and the virtual studio systems are through professional graphics processing technology, simulating actual TV show scene, precise sensing of camera motion parameter, enable the perspective relationship between actual TV studio visual space and virtual space exactly the same. In the virtual studio systems the host must be in a blue space, and be dug out by chroma-synthesizer into the virtual environment or the 3D graphic, achieving TV programs production.In recent years, with the continuous development of computer graphics, image, video technology, at the same time the domestic more emphasis on packaging effect of TV programs, TV production and broadcasting requirements on graphics titles are higher and new. Mainly reflected in as follows:Requirements are greatly enhanced and rich and real 3D graphics broadcast effect; Demand for specialized programs requirements to provide professional graphic packaging products; 3D graphics with the camera tracking can be in the real environment.The most important technology trends of TV graphic products are the engines based on the 2D planar technology and real-time 3D space computer graphics rendering technology,which have started to become the basis of various graphics applications, such as the under-layer platforms for title technology and virtual studio technology are gradually integrated, upper-layer application in progressive integration. Rendering mechanism of 3D graphics system uses either OpenGL or Direct3D rendering technology, and the sensor tracking technology is based on mechanical sense encoder or pattern recognition, these techniques and computer technology especially 3D graphics accelerator card technology are complement each other, which are in the rapid development. Fully utilizing computer real-time 3D graphics rendering technology, with camera sensor tracking technology, creating rich realistic dynamic tracking 3D effects have become the new generation of core technologies and highlights of TV graphics systems, and in the real environment 3D graphics with camera tracking have become possible. Implanting the virtual 3D objects and the 3D graphic titles in the real-life scenery photography, virtual and reality combination program production systems are increasingly recognized by the vast television workers, especially in some major sports events and live broadcast, under the control of the camera lens, the computer 3D graphics systems produce the virtual and reality combination 3D program effects, which combine the host and the real scenes with the virtual scenes, implanting the true 3D graphics information into the tournament scene, performance show, live news, weather broadcast, financial news, sports broadcast applications, etc. to increase the program visual effects.