gdanmitchell Offline Dedicated FM Upload & Sell: Off
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Regarding the 'not as a whole' approach, a few more details in case you are not familiar. Using CS4, let's imagine that you want a bit more detail in the forest at upper left but you want the dark tones to remain dark:
1. Open in CS4.
2. Select the lasso tool.
3. Draw a boundary around the area you want to work on - in this case the upper left trees. I'd err on the side of selecting slightly inside this boundary.
4. With this tool still selected fine the "Refine edge..." button, most likely on a tool bar near the top of your screen unless you've customized.
5. Click the red button (other options are possible) on the window that pops up so that you can your selection. Adjust the "feather" setting for a smooth transition between selected and non-selected areas. (The setting depends on man factors I won't go into.)
6. If the selection spills over into the surrounding area either reduce the feature, use contract/expand, or select again and start over.
7. Click OK.
8. Go to Layer --> New Adjustment Layer --> Curves and click OK in the dialog that pops up.
9. Adjust the curve to bring up the lighter areas of the forest a bit and perhaps also darken the darkest tones just a touch. (There is much more to the methods of making this adjustment than I'll describe here.)
10. Note that the new layer in your Layers window for this adjustment has a mask now. You can fine tune the edges of the mask (or even add this effect to other parts of the frame) by selecting this mask and then "painting" on your image with a white paintbrush, gradually adding (or subtracting) this effect.
A couple final points.
1. This technique is fundamental to effective post-processing. In most cases, the use of masks to make localized adjustments like this is the primary technique for doing work in post. While some images may have only one or a few masked layers, others can have many, many of them.
2. The local masking technique can be used to adjust other things besides curves. (And curves can be used to adjust things other than "contrast.") Candidates include color balance, BW conversion, and much more.
3. There are a number of ideas regarding how to make and adjust the dimensions and borders of the selection that I won't go into here.
Dan
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