Gordons Astronomy

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Photoshop Flat Field

To begin Flattening an image, select DUPLICATE from the Image Directory. Now a second window of the picture pops up.


Now you want to select FILTER-NOISE-DUST & SCRATCHES from the pull down window. And then set it for 50 pixels. Click OK.


To remove the lighted areas, choose HEALING BRUSH tool... Find a bare spot and press Option Click to select a paint color and paint over the lighted areas. Your image should now look like this:


Next, click the original picture image and then Photoshops IMAGE-APPLY IMAGE and set the window setting to SUBTRACT and image.COPY as the source and set the Opacity to 100%, Scale to 1 and Offset to 50. Now click OK.

Now your image should appear Flat Fielded.


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