December 2006
Beginner
224 pages
7h 33m
English
book
Welcome to Oz: A Cinematic Approach to Digital Still Photography with Photoshop
by Vincent Versace
Content preview from Welcome to Oz: A Cinematic Approach to Digital Still Photography with Photoshop
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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, ...
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