87
Color Space According to the COLOR SPACE Settings
App
end
ix
Color Space According to
the COLOR SPACE
Settings
Colorimetry
1. Virtual chromaticity points at S-Gamut/
S-Gamut3
The virtual color space at S-GAMUT is shown in the above
chart. The virtual chromaticity points are as follows:
When converting the color space of a video source shot
with this camera in S-Gamut/S-Gamut3 mode, use these
virtual chromaticity points.
These chromaticity points are “virtual” because they do
not represent the actual, accurate color space but are the
calculated values for calculation of color space conversion.
These virtual chromaticity points have been introduced
because the actual color space cannot be represented as a
triangle in this colorimetry.
The following equation provides a simple conversion from
the color space for S-Gamut/S-Gamut3 to that for
conventional cameras (HDC-F950, HDW-F900R, etc.):
(Rw, Gw, Bw): RGB values for the original color space for S-Gamut/
S-Gamut3
(R, G, B): Values after being converted to the color space for
conventional cameras
Use the following equations to convert from S-Gamut/
S-Gamut3 to another color gamut.
Converting to ITU-R.BT709/sRGB
(Rw, Gw, Bw): RGB values for the original color space for S-Gamut/
S-Gamut3
(R, G, B): RGB values after conversion
Converting to ACES-GAMUT (Academy Color
Encoding Specification)
(when converting from S-Gamut to ACES-
GAMUT)
• Daylight: 5500K
• Tungsten: 3200K or 4300K
(Rw, Gw, Bw): RGB values for the original color space for S-Gamut
(R, G, B): RGB values after conversion
(when converting from S-Gamut3 to ACES-
GAMUT
1)
)
1) The light source coefficient does not need to be changed.
(Rw, Gw, Bw): RGB values for the original color space for S-Gamut3
(R, G, B): RGB values after conversion
x
y
R
0.73
0.28
G
0.14
0.855
B
0.1
–0.05
y
x
0.8
1
0.6
0.4
0.2
- 0.2
0.2
0.4
0.6
0.8
1
- 0.2
S-Gamut/S-Gamut3
Film
DCDM REF PJ
CRT
