Dominique James, Photographer

It's all about the pictures …

How to minimize noise in digital photos

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Dave Johnson, TechHive:

In the days before digital photography, seemingly every corner store had rack upon rack of film on display. Each roll of film was marked with a speed—measured in ISO—such as 100, 200, or 400. Higher-speed film was handy for low-light photography, but it had a serious disadvantage: grain.

Film grain was every photographer’s nemesis. Instead of smooth, natural textures, grain put ugly blotches all over a photo. And though the days of grainy photos are far behind us, digital photos have a similar problem: digital noise.

You’ve undoubtedly seen noise in your own photos. On the plus side, noise tends to be very small; and when you view a many-megapixel photo on a computer screen, pixel-size noise is so small that it usually disappears into the background. You might look at a very noisy photo and not even know it. Noise becomes apparent, though, when you zoom in—if you crop it down to a small detail, for example, or if you attempt to make a large print. Let’s learn how to control noise.

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Written by dominiquejames

April 23, 2013 at 6:00 PM

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