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Chapter 4: Color in Image and Video
Gamma Correction

Gamma defines the relationship between a pixel's numerical value and its actual luminance. Without gamma, shades captured by digital cameras wouldn't appear as they did to our eyes.

Specification of sRGB Standard Color Space

Hewlett-Packard and Microsoft propose the addition of support for a standard color space, sRGB, within the Microsoft operating systems, HP products, the Internet, and all other interested vendors.

The CSS Color Module Level 3

CSS (Cascading Style Sheets) is a language for describing the rendering of HTML and XML documents on screen, on paper, in speech, etc. It uses color-related properties and values to color the text, backgrounds, borders, and other parts of elements in a document.

Color FAQ - Frequently Asked Questions Color

This document clarifies aspects of colour specification and image coding that are important to computer graphics, image processing, video, and the transfer of digital images to print.

HMMD color space and method for quantizing color using HMMD space and color spreading

The new MPEG standard, MPEG-7 is discussed in Chapter 11. That standard somewhat sidesteps the thorny question of whose favorite color space to use in a standard definition by including six color spaces. One of them is a new variant on HSV space, called HMMD Color Space, that purports to allow a simple color quantization, from 24-bit down to 8-bit color, say, that is effectively equivalent to a complex vector color quantization (i.e., considering a more careful, but also more expensive mapping of the colors in an image into the color LUT).

A Matlab script to exercise (and expand upon) the color transform functions that are part of the Image Toolbox in Matlab: the standard 'Lena' image is transformed to YIQ and to YCbCr.



Fundamentals of Multimedia