ImageEnVect.Proc.FeatherAlphaEdges(5);
ImageEnVect.Update;

ImageEnVect.Select(0, 0, 50, 150);
ImageEnVect.Proc.CropSel();
ImageEnVect.Proc.FeatherAlphaEdges(5);
ImageEnVect.Update;

ImageEnVect.Proc.FeatherAlphaEdges(5);

// Feather edges of an image
ImageEnView1.IEBitmap.AlphaChannel; // Ensure image has alpha channel
ImageEnView1.IEBitmap.Resize(1, 1, 1, 1, clWhite, 0); // Add a alpha border
ImageEnView1.Proc.FeatherAlphaEdges(10);