Basically I want to clarify exactly what it is stating to do..
STEP 5: Sharpening
This step can make or break your image. Too little sharpening will cause an image to look soft, too much sharpening causes jagged lines, grain and a white lining around all edges with high contrast. It’s crucial to find a right balance between the two.
Sharpening is only useful for areas with high detail. Large areas without detail, like the sky, should not be sharpened. If this is done this will only lead to unnecessary forming of grain. The trick is to deselect the sky when sharpening.
First, duplicate the background layer for a later purpose. Right-click on the background layer and choose “Duplicate Layer”.
Use the “magic wand”-tool (see red circle below). This selects everything with the same intensity. You can set the tolerance in the Options toolbar (other red circle, set at 5 in this example). Press anywhere in the sky and it will select a big area. Press “shift” and click on an area in the sky that has not been selected yet. It will be added to your selection. Do this until you have selected the whole sky.
selecting the background
The amount of times you need to repeat this depends in the tolerance you have set.
Next, invert the selection: menu “Select -> Inverse”. Now you’ve selected everything but the sky. As sometimes the ‘marching ants’ that indicate the selection border now cover the airplane, expand the selection with 1 pixel, to make sure all edges of the aircraft are in the selected area: Menu “Select -> Modify -> Expand”.
Now you can sharpen. There are many roads that lead to Rome and this is just one of them. Apply USM (menu “Filter -> Sharpen -> Unsharp Mask…”) with the following parameters: 200, 0.2, 0.
To prevent a hard transition from sharpened to unsharpened areas; expand the selection with 1 pixel before applying another pass of USM. Repeat this until you find a desired level of sharpness. (Smooth transition from selected to unselected areas can also be done using the “feather” feature).
If in this process jagged lines appear, they can be smoothened again by using the Eraser-tool (with a small brush size). Sharpening was only applied to the Background Copy layer, so the background layer is still unsharpened. If you erase on the sharpened layer, the unsharpened layer underneath will appear (without jagged lines). Also, if grain has come out during sharpening, erasing in the sharpened layer can also reduce this.
When all is as desired: flatten the image (combining all layers).
Menu: “Layer -> Flatten Image”
(You can also create a new layer every time you do one pass of USM. Duplicate layer, USM, erase jaggies, flatten the layers and repeat the process again, duplicate, USM, erase jaggies, flatten. Etc.)
The part where i'm confused is if I want to sharpen another round, do I need to once again deselect everything and use the "magic wand" re-do all steps ....duplicating the layer and follow the same steps?
Or because the aircraft is already selected just follow the "SELECT>>MODIFY>>INCREASE 1 pixel>>UNSHARP MASK and repeat?
All help is appreciated.