What you could do is extend the image:
You can adjust background for the background color and gravity for the position.
A lot of documentation for ImageMagick can be found here: https://www.imagemagick.org/Usage/
MagickColor background = MagickColors.Fuchsia; Gravity gravity = Gravity.Center; loadedImage.Extent(zoneAreaWidth_Pixels, zoneAreaHeight_Pixels, gravity, background);
A lot of documentation for ImageMagick can be found here: https://www.imagemagick.org/Usage/