Noise Removal

Open photo

               Select channels option in Layers Palette

               Magnify image up to 100% to view noise

                         Select          >        Red Channel

You will now have a black and white image displayed. You will get varying levels of noise in each of the 3 colours, Red, Green and Blue. To remove the noise -

Filter                  >                Blur               >              Surface Blur

Radius               10

Threshold           15               Adjust to blur the noise to suit your requirements

Repeat above for the remaining channels

                                                   Green

                                                   Blue

Go back to RGB and view the image you will see that by reducing in each channel you have far better control over the result than if you use Gaussian Blur or the built in noise filters.

Surface Blur only blurs large areas of colour whilst leaving detailed edges alone

   Before noise removal

   After noise removal

The settings you will choose will depend on the look and feel of the image you are manipulating. I used the same for each channel (RGB) Radius 10  -  Threshold 5. Each image is different you may only need to remove the noise in one channel, then that is all you do.  This above image is only an enlarged section of the corrected image to show the effect.

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