Vignette Examples
 
Fig. 1.  Before
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Fig. 2.  After
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Make an Oval Selection

Fig. 3  Oval selection using the Marquee tool
  1. Optionally, you can save this selection by Select > Save Selection, then give it a name.  You can Load that selection later if you want to.
  2. Select > Inverse  inverts the selection so that everything except what is inside the oval is now selected.  The "inverse" is the "complement" of the previously selected set.
  3. Select > Feather  and then input a fairly large number.  I used 80 on this 2MP image.  If this were a 5PM image I would have used a number in the 100 to 200 range for this effect.
  4. Change the "Background Color" to a color of your choice.  Skip this step if you already have the proper color.
  5. If you now click on the Backspace or Delete key on your keyboard, you will now replace the selected area with the background.  Since we set the Feather to a large number, there is a good sided transition before the white.
If you want a larger or smaller transition to the background color, click the StepBackwards button one time in order to get to the point right before the previous step 5.  Change the Feather size to a smaller or larger number, then repeat the final step of Deleting the selected area to reveal the background.

If you choose a different background color in step 4, for example gray, you will get a result like that shown below in Fig. 4.
 

Fig. 4  Vignette with gray background
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Fig. 5. Vignette with Gaussian Blur
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In order to get the blurred vignette shown in Fig. 5, you do all of the steps listed above up to and including step 3. (You do not use a background color and delete the selection.)  After step 3 above, you then do the following:



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