Vignetting Reducer can help you reduce or remove the effects of vignetting from a photograph, often caused by the mechanical properties of the lens, wrongly aligned filters or hood attachment. The software uses a process that involves the taking of a second picture using a bright background with the same lens, filters and hood that caused the initial vignetting effect. You can then load the second image as a mask and further adjust the effect and brightness until the vignetting effect is reduced or removed. Can produce good results, but involves some effort.

The license of this software is Freeware, you can free download and free use this digital photo software.