O'Reilly logo

Fundamentals of Computer Graphics, 4th Edition by Peter Shirley, Steve Marschner

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Chapter 18

Light

In this chapter, we discuss the practical issues of measuring light, usually called radiometry. The terms that arise in radiometry may at first seem strange and have terminology and notation that may be hard to keep straight. However, because radiometry is so fundamental to computer graphics, it is worth studying radiometry until it sinks in. This chapter also covers photometry, which takes radiometric quantities and scales them to estimate how much “useful” light is present. For example, a green light may seem twice as bright as a blue light of the same power because the eye is more sensitive to green light. Photometry attempts to quantify such distinctions.

18.1 Radiometry

Although we can define radiometric units in many systems, ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required