Using Targets and Charts in Digital Photography by Douglas Rea
From the website: Before digital cameras, computers, and electronic printers, color management was tangible in most respects. Films were designed and manufactured with a specific color balance, letting us choose between daylight and tungsten-balanced products. Today, professional photography relies less and less on the traditional techniques like fast film processing services, contact sheets, proof sheets, and those formerly ubiquitous ink-jet prints to assess the color of their photographs. Instead, photographers view and soft-proof their images on computer monitors. One way to establish a color baseline is to use targets, charts, and color samples that let you calibrate your equipment to an established set of color values.
