G
gamma
The values produced by a monitor from black to white are nonlinear. If you graph the values, they form a curve, not a straight line. Gamma defines the slope of that curve at halfway between black and white. Gamma adjustment compensates for the nonlinear tonal reproduction of output devices such as monitor tubes. Gray Gamma 1.8 matches the default grayscale display of Mac OS computers. Gray Gamma 2.2 matches the default grayscale display of Windows computers. See also, Adobe Gamma.
gamut
The total range of colors produced by a device. A color is said to be "out of gamut" when its position in one device's color space cannot be directly translated into another device's color space. For example, the total range of colors that can be reproduced with ink on coated paper is greater than that for uncoated newsprint, so the total gamut for uncoated newsprint is said to be smaller than the gamut for coated stock. A typical CMYK gamut is generally smaller than a typical RGB gamut.
GCR
Abbreviation for gray component replacement; the separation technique where black ink is used to replace either a portion of the unwanted component in a saturated color, or a combination of cyan, magenta, and yellow equivalent to the unwanted component. Typically specified to improve color control on older presses. Contrast UCR.
GIF
Acronym for Graphics Interchange Format; a commonly used graphic file format (e.g., for Web pages) developed by Compuserve, Inc. that can be either 1-bit or 8-bit, rendering from 2 to 256 colors or shades of gray.
gray balance
The reduction of magenta and yellow in relationship to cyan required to render a neutral on a CMYK device. Gray balance is required because of ink hue errors. An example of dot percentages that will yield a neutral on a U.S. printing press are 5% cyan, 3% magenta, and 3% yellow for the highlight neutral.
grayscale
(1) The series of tones stepped from white to black and containing no color. (2) The Photoshop image mode used to represent a range of neutral tones, such as those from black-and-white photographic originals.
The values produced by a monitor from black to white are nonlinear. If you graph the values, they form a curve, not a straight line. Gamma defines the slope of that curve at halfway between black and white. Gamma adjustment compensates for the nonlinear tonal reproduction of output devices such as monitor tubes. Gray Gamma 1.8 matches the default grayscale display of Mac OS computers. Gray Gamma 2.2 matches the default grayscale display of Windows computers. See also, Adobe Gamma.
gamut
The total range of colors produced by a device. A color is said to be "out of gamut" when its position in one device's color space cannot be directly translated into another device's color space. For example, the total range of colors that can be reproduced with ink on coated paper is greater than that for uncoated newsprint, so the total gamut for uncoated newsprint is said to be smaller than the gamut for coated stock. A typical CMYK gamut is generally smaller than a typical RGB gamut.
GCR
Abbreviation for gray component replacement; the separation technique where black ink is used to replace either a portion of the unwanted component in a saturated color, or a combination of cyan, magenta, and yellow equivalent to the unwanted component. Typically specified to improve color control on older presses. Contrast UCR.
GIF
Acronym for Graphics Interchange Format; a commonly used graphic file format (e.g., for Web pages) developed by Compuserve, Inc. that can be either 1-bit or 8-bit, rendering from 2 to 256 colors or shades of gray.
gray balance
The reduction of magenta and yellow in relationship to cyan required to render a neutral on a CMYK device. Gray balance is required because of ink hue errors. An example of dot percentages that will yield a neutral on a U.S. printing press are 5% cyan, 3% magenta, and 3% yellow for the highlight neutral.
grayscale
(1) The series of tones stepped from white to black and containing no color. (2) The Photoshop image mode used to represent a range of neutral tones, such as those from black-and-white photographic originals.
DIC-F166 フランスの伝統色 JAUNE MIMOSA 含羞草黄
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