Nikon 9235 Reference Manual - Page 113

The RGB Sheet, Gamut RGB, compensated Wide Gamut RGB, and Scanner RGB

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The RGB Sheet The RGB sheet is where you select the color-space profile used for the calibrated RGB color model. The profile used can be selected from the Color space menu. Each of the profiles listed may be classified according to its gamma value and gamut. Gamma is a fundamental characteristic of imaging systems which determines the intensity of the output signal relative to the input; in human terms, gamma controls the subjective brightness of images through alterations to the output level for mid-tones. Windows and Macintosh systems process video signals differently, and these differences are reflected in the difference in the standard gamma values for these platforms. The default system gamma for Macintosh computers is 1.8, the de facto standard for Windows systems, 2.2. Nikon CMS includes eight RGB profiles with a Windows gamma of 2.2 (sRGB, Bruce RGB, NTSC [1953],Adobe RGB [1988], CIE RGB,Wide Gamut RGB, compensated Wide Gamut RGB, and Scanner RGB), and three profiles with a gamma value of 1.8 (Apple RGB, ColorMatch RGB, and compensated Apple RGB), for use on the Macintosh. When scanning images, choose a profile with a gamma value suited to the system on which the image will be edited. Reference: Preferences 112

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112
Reference: Preferences
The RGB Sheet
The RGB sheet is where you select the color-space profile used
for the calibrated RGB color model.
The profile used can be
selected from the
Color space
menu.
Each of the profiles listed may be classified according to its gamma
value and gamut.
Gamma
is a fundamental characteristic of im-
aging systems which determines the intensity of the output sig-
nal relative to the input; in human terms, gamma controls the
subjective brightness of images through alterations to the out-
put level for mid-tones.
Windows and Macintosh systems pro-
cess video signals differently, and these differences are reflected
in the difference in the standard gamma values for these plat-
forms.
The default system gamma for Macintosh computers is
1.8, the
de facto
standard for Windows systems, 2.2.
Nikon CMS
includes eight RGB profiles with a Windows gamma of 2.2 (sRGB,
Bruce RGB, NTSC [1953], Adobe RGB [1988], CIE RGB, Wide
Gamut RGB, compensated Wide Gamut RGB, and Scanner RGB),
and three profiles with a gamma value of 1.8 (Apple RGB,
ColorMatch RGB, and compensated Apple RGB), for use on the
Macintosh.
When scanning images, choose a profile with a gamma
value suited to the system on which the image will be edited.