First, the concept of video landscape
The video landscape refers to a display device with cultural communication content that is built for public viewing with cultural creativity as the core. Several elements here are public places, public viewing, cultural communication, and display devices. In line with these four elements, it is called a video landscape . For example, Beijing's World Trade Day-order large screen meets these four elements. After completion, it forms a typical video landscape and becomes an attraction in Beijing. The large screen used for advertising, although it is a display device for public places and public viewing, cannot be a video landscape because it does not have the connotation of cultural communication.
In China, video landscape has its inevitability. After the economic boom, it is bound to be a cultural boom. Tourism has become a way of life for most people. Watching the “pleasing and pleasing†landscapes is an indispensable part of tourism. The video landscape is particularly stimulating and attracting the attention of the audience because of its dynamic display characteristics. Since it displays content that can be artificially creative and constantly changes, it can provide viewers with various themes with thoughts and content to achieve the transmission culture. The purpose of cultivating interest. The content can be abstract or figurative, so he can adapt to a wide variety of audiences.
The development of video display technology provides a solid technical foundation for the birth of video landscape .
The video landscape can be varied and can be built in various squares of the city, or in theme parks, various parks and tourist attractions.
Water curtain landscape
Sky screen
Architectural projection
Stage projection
Second, the elements of the video landscape
The video landscape consists of three parts: multimedia video display system, construction environment and audience.
Planning and building a video landscape project should be considered from the perspective of a large system, including the audience situation, the construction environment and the multimedia video display system. The analysis and positioning of the audience situation, the choice of the construction environment and planning contribute to the overall success of the landscape project. The construction environment includes the local economic level, climate, lighting environment, etc.; the cultural background of the audience, the number of viewers, and the way of viewing. Cultural background, number of viewers, viewing methods, etc.; and multimedia video display systems include: playback content, players, signal transmission and processing, display device devices, and control and interaction systems.
If any factors are not considered or considered badly, it may lead to the failure of the project. For example, in the cold winter, the projected landscape for the night will not have too many audiences.
The relationship between various elements is shown in the following figure. Only when the relationship between the various parts is deeply understood and the various elements are systematically balanced, can the landscape project be perfectly realized.
Third, the classification of video landscape
According to the construction characteristics of different video landscapes , the video landscape can be divided into outdoor video landscape , indoor video landscape , stage video landscape , and theme park landscape.
Outdoor stage landscape
Indoor skylight landscape
Indoor technology landscape
Outdoor architecture
Fourth, the display technology in the video landscape
Currently, the main display technologies are flat panel display technology, LED display technology and projection display technology, while other display technologies such as OLED, laser scanning display, and holographic display have not yet reached the scale of large-scale commercial applications. In the video landscape project, various forms of display technology and equipment can be used, and in some projects, it may be an integration of various technologies.
Due to the different types of technologies, the three mainstream display technologies also have their own characteristics. LED large screen is very suitable for all-weather outdoor display with its brightness, but due to its large screen, it will also cause damage and image to some existing environments; flat display is very suitable for regular and irregular creative display, with a large number of The group display shows a kind of visual shock. The disadvantage is that the size of the single unit is still relatively small, and there are also problems of coordination and influence with the current environment;
Projection display flat panel display LED display
Projection display is the leading technology in the current video landscape . Its features mainly include no impact on the displayed environment, can be imaged on any reflective medium, can easily realize the display of any shape, and can realize huge single unit. The display can also realize the combined display of multiple monomers, including the traditional viewing habits.
The projection display is mainly composed of a projector and a projection medium, wherein the projector is divided into
Large high-end engineering projector
Engineering projector
Miniaturized projector
Ultra-compact projector
There are many types and specifications of projectors, but they all have some common features. Compared with other display technologies, he does not affect the original state of the projection surface. The shape of the projected image is easy to process and control. Through deformation and fusion techniques, almost any geometric shape can be projected, such as a ball, an ellipsoid, and a ball. , cylindrical and so on. However, the projection is not suitable for outdoor use during outdoor daytime or in a strong aura environment.
Deformation and fusion
Fifth, the projection system design in the video landscape
Pixel design:
According to the size of the venue, the layout of the seat, combined with the human (eye) machine engineering to determine the pixel size, to ensure that the viewing effect does not waste pixel resources.
Brightness design:
According to the illuminance of the scene, the brightness of the screen and the contrast of the image are determined according to the content of the scene.
Optical path simulation:
The projected optical path and the parameters and number of the projector are determined according to the size, shape, brightness, contrast, pixel (resolution) requirements of the screen, and the projector mounting position.
Deformation fusion:
In the simulation of the optical path, one pass is considered. The accuracy of the deformation and the level of the fusion band can be appropriately determined in conjunction with the content of the playback, which can greatly save equipment costs.
Synchronous playback:
According to the number of channels of the projector, the source is divided and played on the corresponding playback device. The playback device needs to be synchronized. For higher requirements, the projector also needs to be synchronized.
Signal transmission:
A good transmission signal from the playback device to the projection device does not cause signal attenuation. It is necessary to combine the routing, transmission distance, and signal format to select the appropriate method and device.
Structure installation:
To ensure that the projection system is placed on a platform without vibration, and the mutual vibration between the projectors does not affect the normal operation of other projectors. It is necessary to ensure the environment of heat dissipation according to the requirements of the projector, so as to ensure normal playback. In the room, it is also necessary to design the noise reduction in combination with the actual configuration.
Pixel design
Brightness design
Optical path simulation
Fusion deformation
Synchronous playback and signal transmission
Structural installation
Conclusion
The video landscape will inevitably achieve great development in the future and make creative contributions to the active cultural life of the people. Accurately grasp the relationship between the elements and the balance of the video landscape, landscape project is the construction of a video guarantee of success. We are willing to work together with organizations and individuals who are interested in this field to promote the development of video landscape in China.
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