GIMP is a free image editing application that enables you to add effects to photos or create cool graphic designs. GIMP users can apply blur effects to their photos while retaining the sharpness of ...
In the Gimp, you should be able to simply use the elliptical selection tool (E) to select the area you want, and then either copy and paste into another image, or Select->Invert (Ctrl+I) and then Edit ...
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