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Photo too grainy?

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Old 08-29-2010, 09:55 PM
tom60634 tom60634 is offline
Join Date: Sep 2008
Posts: 54
Re: Photo too grainy?

I did a quick levels adjustment.

Used Neat Image's jpg noise reduction setting.
Then some photoshop adjustments.

I tried to keep the adjustments as natural as possible.
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Old 09-05-2010, 05:00 PM
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mikedimples mikedimples is offline
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Join Date: Dec 2008
Location: Hollywood, California
Posts: 238
Re: Photo too grainy?

One big trick to noise reduction is to bring back the lighter luminosity values with the blend if sliders (aka. luminosity blenders found under layer styles) or luminance masking. Usually noise is concentrated in the darker tones due to the way camera sensors work. Focusing the noise removal on these areas while protecting the cleaner light areas give more natural noise reduction.

-duplicate the layer
-run noise reduction of choice
-open layer styles, then at the bottom of the panel find the "blend if" section
-alt+click (this splits the slider) and drag the top right white triangle tab to the left and you'll see the original light luminance levels pulled through. If you want to preserve more, then pull the remaining half of the white triangle slider to the left as well until you like what you see.

I also think frequency separation works well here. After separating the noise on the HF layer, we can sharpen the LF layer to bring back some more detail.

Finally, downsizing help hide the noise.
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Last edited by mikedimples; 09-05-2010 at 05:15 PM.
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Old 09-05-2010, 09:45 PM
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chillin chillin is offline
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Join Date: Sep 2006
Location: The Golden State
Posts: 1,324
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Re: Photo too grainy?

I increased the size to 400%, added different noise level to each channel,
applied different levels of a "noise-ware" to each channel separately,
change back to the original size (25%), applied again a "noise-ware" selectively to some stubborn parts.
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