Graphics Programs Reference
In-Depth Information
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EXPERT
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The dominant color cast in
an image changes when it
is shot under different
light sources.
(1) Fluorescent.
(2) Household bulb.
(3) Candlelight.
(4) Daylight.
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This situation occurs because camera sensors are generally designed to record images
without casts in daylight. As the color balance of the light for our three examples is different
from daylight - that is, some parts of the spectrum are stronger and more dominant than
others - the pictures record with a cast. Camera manufacturers are addressing the problem
by including Auto White Balance functions in their designs. These features attempt to ad-
just the captured image to suit the lighting conditions it was photographed under, but even
so some digital pictures will arrive at your desktop with strange color casts.
Some cameras include an Auto White Balance feature designed
to compensate for different light sources.
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