Tài liệu Chiếu sáng trong truyền hình - Television Lighting Television is a means of changing pptx

Chiếu sáng trong truyền hình

(English)

Television Lighting

Television is a means of changing patterns of light into electrical

signals for storage or transmission and then recreating those patterns on a

screen. In order to do this well, the television camera must be presented with

properly illuminated scenes. The three important considerations are overall

level, contrast range, and color temperature.

Level

Lighting levels for television are generally set by adjusting the

incident light, or the light striking the subject. The unit of measure for

incident light is the foot candle, which is the amount of light produced by a

standard candle at a distance of one foot. Lighting measurements are made

using an incident light meter, which has a white plastic cover over the

sensing element and a logarithmic scale calibrated in foot candles. To