Inside Photoshop CS: Shadow/Highlight
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Detail versus noise
Now obviously when you're pulling out detail from the dark areas of an image, some of that detail is bound to be in the form of noise or artifacts. For example, in the image below, when I crank up the Shadow value to 100 percent, I see strong horizontal noise emerging from the image.[an error occurred while processing this directive]
So how can this be alleviated? How can you get the detail without so much noise? Here's how.
1. Convert your background to a layer by double-clicking it in the Layers palette. Then duplicate that layer.
2. Working on the top layer, apply your Shadow/Highlight adjustment.
3. In the Layers palette, move the original bottom layer up to the top of the stacking order.
4. With the top (darker) layer selected, switch its blending mode from Normal to either Soft Light or Pin Light. And voila!
All of the detail and little of the noise.
So there's you're first mini-tutorial on Photoshop CS. Over the coming weeks and months, we'll be exploring more of Photoshop CS' new features, along with those of InDesign CS, Illustrator CS and ImageReady CS. So stay tuned. And, as always, if you have any specific questions or requests, be sure to e-mail me at the address below or visit me in the Adobe Photoshop forum here.
Contact the author: Dave Nagel is the producer of Creative Mac and Digital Media Designer; host of several World Wide User Groups, including Synthetik Studio Artist, Adobe Photoshop, Mac OS, Adobe InDesign, Adobe LiveMotion, Creative Mac and Digital Media Designer; and executive producer of the Digital Media Net family of publications. You can reach him at dnagel@digitalmedianet.com.
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