It’s challenging to reduce the luminance (light and dark) component of noise without compromising image sharpness; often it requires a careful application of specialized software.

However, you can easily reduce the color component of noise using Photoshop.

Here’s how.

1    Duplicate the Background layer and turn the duplicate layer’s blend mode to Color.
2    Blur the layer (Filter: Blur: Gaussian Blur).



Be careful not to use the blur filter too aggressively. If contours exhibit reduced saturation, use a lower filtration

Using this technique, only the color of an image will be blurred, not its luminance; image sharpness will not be compromised. Luminance noise will persist; other methods are required to remove it.

This industrial strength technique is most useful when dealing with serious color noise when a Raw converter’s features can’t go far enough, such as the larger areas of color noise found in some images from Bayer pattern demosaicing.

Find more online here.

Learn more in my digital printing workshops.


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