Frequently asked questions about colour

This FAQ is intended to clarify aspects of colour that are important to computer graphics, image processing, video, and the transfer of digital images to print. I assume that you are familiar with intensity, luminance (CIE Y), lightness (CIE L*), and the nonlinear relationship between CRT voltage and intensity (gamma). To learn more about these topics, please read the companion Frequently Asked Questions about Gamma before starting this. This document is available on the Internet from Toronto at: <ftp://ftp.inforamp.net/pub/users/poynton/doc/colour/> It is mirrored to space provided by Fraunhofer Computer Graphics in Rhode Island, U.S.A. at <ftp://elaine.crcg.edu/pub/doc/colour/>, and in Darmstadt, Germany at <ftp://ftp.igd.fhg.de/pub/doc/colour/>. I retain copyright to this note. You have permission to use it, but you may not publish it.