YUV ( What is this? )

SDL Development
#1

Could anyone please explain me, in a few words, what is YUV?

#2

Miguel Pragier wrote:

Could anyone please explain me, in a few words, what is YUV?

YUV is a colour space format. A colour space has a number of planes that
define the colours. The most obvious colour space is RGB, whereby the
luminance (brightness) of the red, green and blue colour components are
stored separately in each plane.

YUV is different in that there is only one luminance plane (Y) and two
chrominance planes (U, V) that indicate the colour. Additionally, the
chrominance planes are normally subsampled relative to the Y plane, as
the human vision system is not as sensitive to chrominance differences
as it is with luminance. This subsample is normally a quarter of the
luminance plane, i.e. 1 “sample” on the chrominance plane represents 4
pixels of colour info in the final image. Relative to an RGB image
therefore, a YUV image usually uses half the storage requirements.

#3

Tim Angus <tim ngus.net> writes:

Miguel Pragier wrote:

Could anyone please explain me, in a few words, what is YUV?

YUV is a colour space format. A colour space has a number of planes that
define the colours. The most obvious colour space is RGB, whereby the
luminance (brightness) of the red, green and blue colour components are
stored separately in each plane.

Thank you.

And what’s the main reason to choose YUV in place of RGB?
Is it common in game develloping?

#4

Miguel Pragier wrote:

And what’s the main reason to choose YUV in place of RGB?
Is it common in game develloping?

It’s mainly uses for video encoding. Compression codecs often operate in
the YUV colour space rather than RGB.