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Digital Video and HD
book

Digital Video and HD

by Charles Poynton
January 2003
Intermediate to advanced content levelIntermediate to advanced
736 pages
30h 54m
English
Morgan Kaufmann
Content preview from Digital Video and HD
Luminance and lightness 20
In
Color science for video,
on
page 233, I will describe how
spectral power distributions
(SPDs) in the range 400 nm to
700 nm are related to colors.
The term
luminance
is often care-
lessly and incorrectly used to refer
to
luma. See Relative luminance,
on page 206, and Appendix A,
YUV and luminance considered
harmful,
on page 595.
Nonlinear coding of luminance is essential to maximize
the perceptual performance of an image coding system.
This chapter introduces luminance and lightness, or
what is loosely called
brightness.
Luminance,
denoted Y, is what I call a
linear-light
quan-
tity; ...
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Publisher Resources

ISBN: 9781558607927