ResetChromaKeyImage();

  // Resize background to match foreground layer if it smaller
  w := imax(ImageEnView1.Layers[ 0 ].Bitmap.Width,  ImageEnView1.Layers[ 1 ].Bitmap.Width );
  h := imax(ImageEnView1.Layers[ 0 ].Bitmap.Height, ImageEnView1.Layers[ 1 ].Bitmap.Height );
  ImageEnView1.Layers[ 0 ].Bitmap.Resample( w, h );

  ImageEnView1.LayersCurrent := 1;
  ImageEnView1.Proc.RemoveChromaKey( KeyColor,
                                     trkTolerance.Position / 1000,
                                     trkSaturation.Position,
                                     updEdgeFeather.Position,
                                     cmbHueReduction.ItemIndex,
                                     chkRemoveNoise.Checked );

  ImageEnView1.Update();

  ProgressBar1.Visible := False;