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The Photoshop® CS Book for Digital Photographers by Scott Kelby

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Dealing with Digital Noise

If you shoot in low-light situations, you’re bound to encounter digital noise. Is there anything worse than these large red, green, and blue dots that appear all over your photo? Okay, besides that “crazy music” those teenagers play, like Limp Bizkit or...well...Limp Bizkit, is there anything worse? This digital noise (often called “blue channel noise,” “high ISO noise,” “color aliasing,” or just “those annoying red, green, and blue dots”) can be reduced. Here’s how.

Step One.
Open a photo that contains visible digital noise (in this case, it’s a shot taken in low light, and those “red, green, and blue” dots appear ...

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