Technology empowers image dissemination to enrich audience's audio-visual experience
2024-10-10
With the support of various media technologies, the presentation of television program content has been renovated, bringing viewers a richer audio-visual experience. Not long ago, the 2024 CCTV Mid Autumn Festival Gala used cutting-edge technologies such as artificial intelligence and 5G to present a cultural feast for audiences at home and abroad. The evening program "Chiling" used artificial intelligence, virtual reality and other technologies to "awaken" cultural relics in the collection of Liaoning Provincial Museum, such as the "Rui He Tu" scroll, the "Ten Scenic Spots of West Lake" scroll, and the blue and white pine, bamboo and plum patterned octagonal jar, making the patterns on the cultural relics "come alive"; The program 'When You're Old' utilizes generative artificial intelligence technology to assist in creation, interspersing a video clip that spans time and space in the song. In the video clip, the protagonist in the photo engages in dialogue and embrace with their young or old self... Virtual studio technology connects the virtual and real worlds from the live action studio to the background studio and then to the virtual studio. As an important scene in television program production, the studio has undergone multiple iterations. Virtual studio technology is a television program production method that integrates advanced technologies such as computer graphics, real-time rendering, image synthesis, and tracking technology Introduction by Zhou Wen, Director and Professor of Digital Media System at the School of Arts and Media, Beijing Normal University. Camera tracking technology is a core technology among many virtual studio technologies. It can achieve precise synchronization between the camera's captured images and virtual scenes, making the movement of characters in the scene smoother and the spatial position more accurate. The color key technology, known as "green screen cutout" technology, is an important component of virtual studio technology. Fan Shucheng, director of the Experimental Teaching Center at the School of Language and Communication, Beijing Jiaotong University, explained that chroma key technology uses a chroma key signal generator to "remove" high saturation color backgrounds such as green or blue from the camera's captured image, and then replace them with the required images or virtual scenes for the program. However, in a green screen environment, the hosts or actors in the program lack a realistic visual experience and can only rely on imagination to interact with the environment Zhou Wen added. In recent years, Extended Reality (XR) virtual studio technology has gradually matured. Fan Shucheng introduced that this technology can integrate virtual content with real scenes. It can replace the green screen in color key technology with a 3D background composed of LED, which can achieve pre production work, allowing the host or actor to be "immersed" in the shooting and better achieve precise coordination between the characters and the background. Zhou Wen gave an example, in the old drama program "Spring in the Pear Garden" on Henan TV, the actors reinterpreted the red historical story "Flying to Conquer Luding Bridge". The program producers used XR virtual studio technology to recreate the scene of the Red Army's capture of Luding Bridge in the past. CG special effects technology: Enhance visual effects CG, also known as computer graphics. Zhou Wen introduced that CG special effects technology generally refers to the method of using computer graphics technology for visual art creation. This technology is widely used in film, television, and game production, mainly for creating images, animations, and more. The operational steps of CG special effects technology include using professional software for modeling, texture design, rendering, and synthesis. Dynamic image processing technology is one of the core technologies of CG special effects technology. Production personnel can use dynamic image processing technology to edit, modify, and enhance images, making them better integrated with the scene and improving the visual presentation effect. Another key technology of CG special effects is 3D modeling and animation technology. By using professional 3D modeling software, production personnel can freely create models of different shapes and structures, and import them into dynamic image processing software for synthesis processing; Then, using computer technology, set the motion trajectory of the model to achieve a more realistic visual effect. Of course, after the special effects are produced, further adjustments and optimizations are needed in post production to achieve the best presentation of the image. Fan Shucheng introduced that CG special effects technology has appeared multiple times at the Spring Festival Gala of China Central Radio and Television Station. For example, to showcase the ancient Shu culture of Sanxingdui, the creative dance program "Golden Face" was created for the 2022 CCTV Spring Festival Gala. The program uses CG special effects technology and optical motion capture technology to make the bronze standing figure "move". Unreal Engine Technology: Creating Realistic Scenes is not unfamiliar to many gamers. Nowadays, this technology that can create realistic scenes is applied in television program production. Fan Shucheng introduced that using Unreal Engine technology, production personnel can create very realistic buildings, characters, light and shadow, particles, etc. Unreal Engine technology has significant advantages in real-time rendering, no longer relying on post production. Production personnel can use Unreal Engine technology to see the final presentation effect at the filming location of the program. Unreal Engine technology can also be combined with virtual studio technology to present more realistic visual effects to television viewers. Physical simulation technology is the key to building realistic virtual environments using Unreal Engine technology. Physical simulation technology utilizes mathematical models and computational methods to simulate the process of object motion and interaction in the real world, making the scenes in virtual environments more realistic and trustworthy. In September of this year, Typhoon Capricorn made landfall in China, and CCTV released a very novel weather forecast. In this video, the host "walked into" the street in the storm, and the umbrella in his hand was "blown away" instantly by the storm, and was almost "hit" by fallen trees. Many netizens exclaimed, 'Has weather forecasting developed to this extent?!' This realistic scene was built using Unreal Engine technology. Nowadays, more TV programs have begun to try using Unreal Engine technology for production. This technology can bring viewers a more immersive viewing experience and also enable TV program creators to turn more imaginative ideas into reality. (New Society)
Edit：Shen Wei Responsible editor：Zhu Jiaqi
Source：Science and Technology Daily
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