April 2013
Beginner
224 pages
6h 1m
English
Content preview from Film Technology in Post Production, 2nd Edition
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How colours are reproduced in film and television.
Film Processing
Additive and Subtractive Colour
Colour vision: additive colour
The retina of the eye is covered with light-sensitive cells, known as rods and cones. Rods are the more sensitive, but do not distinguish colours: cones fall into three classes, sensitive respectively to red, green and blue light, although the response curves overlap considerably. The brain is able to recognize any combination of signals from the three types of cone as evidence of a specific colour. For example, yellow light of wavelength 580 nm produces equal responses in the red and green cones.
We can produce the effect of any colour by adding together the right proportions of the three additive primary colours ...
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