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Old 28-06-2008, 04:38 AM
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Tandum (Robin)
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Tandum is offline
Join Date: Apr 2008
Location: Carindale, Brisbane.
Posts: 4,129
Highlight Mask or Brighten DSO. This lets you brighten up a DSO without effecting the sky and stars.

Press Control-J. (Layer via Copy).

Select all of the original image and copy to clipboard.

Layer > Layer Mask > Reveal All. (Create a layer mask).

Alt Click on the new layer mask icon in the layers palette and paste, then invert that layer. Image Adjustments > Invert.

Increase the contrast of that mask with levels or curves. Move the black point to about 64 and the white point to about 220. Experiment with these points.

Apply a small gaussian blur to the mask.

Select the original image and drag the white point to the left in levels to brighten the DSO.

The opacity of the layer may also be adjusted.

Flatten the image when done.

Last edited by Tandum; 28-06-2008 at 05:50 AM.
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