/ Operator Details
10.4.61 - Vignette
This operator can create vignettes (a darkening of the image towards the extents of the presumed lens that was used to acquire the image) or it can remove them.
Creating a vignette is done by reducing the brightness, and optionally reducing the contrast.
Removing a vignette created by an actual lens is done by increasing the brightness and almost certainly the contrast. As every lens produces a different level of vignetting, experimentation will be required to determine the correct values for a specific lens.
Radius controls how deeply the vignette, or anti-vignette, intrudes on the image content.
The vignette operator
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This manual was generated with wtfm
wtfm uses aa_macro and SqLite
wtfm and aa_macro are coded in python 2.7