Close
Thanks a lot petopeto, been using your action and it works very well.

petopeto said:
This does a pretty good job, but there's still noise clearly visible in the darker areas. I tried something different here: select just the darker areas (Select -> Color range -> Shadows) and run greyc again.
Actually, there's a way to get a more refined selection.

1) Duplicate the layer, double click on it to bring up blending options. It will bring up a dialog box.

2) Look for the "Blend if: Gray" and the "This layer:" slider and grab the white triangle handle and adjust it downwards towards black(alt click and drag the triangle to split it in half). Drag the split triangle to adjust blending. I found that settings of 0(black triangle), 100(left-half of white tri) and 180(right-half of white tri) work well.

3) Run Greycstoration on the layer.

4) Flatten image.

This method gives you a very smooth result and more control over the darks that receive the noise reduction.