HDR Photography: Sharpen Images in Photoshop Elements
Remember, you want to preserve the Background layer of your HDR image in Photoshop Elements so you have the original tone mapped image within this file. Layers are important when it comes to editing a tone mapped HDR image.
Create a duplicate of the Background layer, or create a merged copy if you already have several layers. Make sure you rename the layer in the Layers palette with a descriptive word.
If necessary, sharpen the image (make sure your new duplicate layer is selected first) by choosing Enhance→Adjust Sharpness or Enhance→Unsharp Mask. The Adjust Sharpness dialog box appears, as shown, where the user is sharpening the building. The sign is a good guide to see the effects. If necessary, use blending techniques to isolate what you want sharpened and blend that in with the rest of the image.
The point about duplicating layers is you want to keep renaming as you go along. If you have semi-transparent blended layers, duplicating isn’t enough. You have to select the entire canvas, perform a merged copy, and then paste that as a new layer.