Nikon user manual Appendix E, 149, Glossary, See Color management system

Glossary

Appendix E

Glossary

This glossary provides definitions of some of the terms used in this manual.

Bit depth

The number of bits used to express color, also referred to as color depth. The bit depth deter- mines the amount of color information in an image. The greater the bit depth, the larger the number of colors, and the finer the gradations, that can be expressed. Bit depth can be used to refer both to the number of bits per channel and to the combined bit depth for all channels; thus, for example, an image with a bit depth of eight bits per channel can be said to have a bit depth of twenty-four bits. An image with a bit depth of one bit has only two colors, typically black and white, with no gradation between the two. See also Channel.

Black Point

The input value below which all input tones are mapped to the minimum output value (by default no color, or black). Any details darker than the black point will be lost. See also Tone, Tone curve.

Channel

The component colors in a given color space. The RGB color space is made up of red, green, and blue channels and a master channel that combines the three. See also Color space.

Clip

The percentage of pixels at both ends of the curve that are excluded in an auto contrast op- eration. See also Tone curve.

CMS

See Color management system.

CMYK

A reflective (subtractive) color model commonly used in printing, which models color using combinations of the three secondary colors used in printer’s ink, Cyan, Magenta and Yellow. Because no combination of these three inks will create a true black, blacK ink is also used.

Color management system

A method of ensuring consistency of color reproduction between devices such as scanners, monitors, and printers, and between different computer platforms. In the color management system used in Nikon Capture 4, accurate color reproduction is ensured through the use of profiles that provide information about the characteristics of the monitor or printer and the color space used for editing. See also ColorSync, ICC, Profile.

Color space

A general term encompassing both the model used to define color (for example, CMYK or RGB) and the range, or gamut, of colors that can be expressed in a given color model. See also CMYK, Gamut, RGB.

ColorSync

A color management system for Mac OS developed by Apple. See also Color management system, ICC.

149