Campus television station lighting

Studio lighting and recording system is the core part of the entire digital campus television station, in order to achieve the desired effect requires rigorous design, studio design is as follows:

Requirements for lamps and lanterns: studio lighting system is built on the basis of a new type of three-color soft light, the light emitting uniformity, small shadows, less heat, constant color temperature and uniformity, the light cloth in the face of the host of natural and Realistic. This kind of light to meet the virtual studio on the basic requirements of the light.

Regional lighting: in the studio, in order to enhance the authenticity of the program, liveliness, the host will have a certain area of activity, therefore, the foreground (host) light can not be like the news class lighting - positioning of the point of light, but must be regional lighting.

Stereoscopic lighting: the traditional news studio generally use three-point lighting principle to meet the requirements of television lighting, and studio technology using the color keyer blue technology for keying blue processing, therefore, to eliminate the impact of blue on the foreground (moderator) must have a three-dimensional lighting concept.

First foreground light, after the blue box light: because the three-color soft light emitting area, the foreground (host) after a good light, will be in the blue box to produce a certain degree of illumination. Therefore, the foreground illumination meets the requirements, and then the blue box for appropriate fill light can meet the requirements of the computer key blue. The key to the perfect blend of foreground and electronic background in the foreground and blue box scientific and reasonable lighting.

Requirements for illumination: studio illumination is different from the traditional studio, it requires the foreground and blue box background illumination to match the pursuit of light consistency. In addition, the flexibility of the studio columns, electronic background of the diversity also requires illumination must meet the needs of different columns, different electronic background.

Lighting design features:

Surface light: the studio's surface light is generally low and flat, try to avoid the primary projection on the host. Because the blue box reflected light acts on the shadow, through computer processing, this shadow will be color keyer blue elimination circuit to eliminate, thus affecting the output of the foreground (host) image quality. It is not recommended to add the main light source in the studio, because if it is not used properly, there may be a logical error in the projection environment, and the inconsistency between the actual light source and the virtual light source may occur. In addition, the secondary projection created by the primary light source on the blue box can affect the computer's image processing.

Backlighting: the traditional principle of backlighting is stronger than the main light, thus highlighting the host's distinctive contours, enhance the sense of spatial dimension. Studio must pay attention to the reasonable use of backlighting. Too strong backlighting, so that the blue box ground is now bright white and destroy the consistency of the blue box color, affecting the computer key blue effect; foreground in the blue box on the ground secondary projection will also affect the computer image processing. And do not use backlighting or backlighting is too weak, the foreground (host) like sticking in the electronic background, very rigid. Therefore, the reasonable use of backlighting can be a good reflection of the relationship between people and the scene, thereby strengthening the sense of depth and enhance the three-dimensional effect.

Side light: the studio must add side light. Because the virtual system in the color keyer using blue elimination circuit, the blue box by the blue box reflected light on the edge of the host clothing on the blue tones will be removed by the blue elimination circuit, out of the edge of the host becomes black. Therefore, side light must be added to eliminate the blue component on the edge of the presenter's clothing.

Refractive light: try to avoid the host clothing reflected light, transparent props produced by the refracted light on the blue box, the blue box on the high brightness will cause the background part of the composite image of the foggy image.

White balance: pay attention to avoid the impact of the blue box reflected light on the white balance. Poorly adjusted white balance can result in low mask signal levels and distorted colors of foreground objects.