O'Reilly logo

Welcome to Oz: A Cinematic Approach to Digital Still Photography with Photoshop by Vincent Versace

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

Advanced B/W Conversion No. 2

The Fourth Channel Mixer Layer: Expanding the Dynamic Range of a Continuous-Tone Black-and-White RGB File

At this point you should be fairly clear on the concept that red, green, and blue, the primary colors of light, all have relationships with each other. It’s that interrelationship in the visible spectrum that our eye perceives as “color.” What is unique about black-and-white film is its ability to record the spectral relationships among the primaries of light; it can also record the changes in those spectral relationships and do so in a grayscale.

When you convert RGB to a “gray scale” the way you did in the previous two exercises, you basically created a “digital positive negative.” Negative in the sense that, ...

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