// ImageMagick command line tools
// https://imagemagick.org/script/command-line-options.php

convert <image16bit> -depth 8 -auto-level <image8bit>
convert <image16bit> -depth 8 -normalize <image8bit>
convert <image16bit> -level 20%,100% -normalize -trim <image8bit>

// MagickImage interface methods
// https://github.com/dlemstra/Magick.NET/blob/main/src/Magick.NET.Core/IMagickImage.cs

image.Alpha(AlphaOption.Opaque);
image.AutoLevel();
image.BitDepth(8);
image.Format = MagickFormat.Bmp;
image.Grayscale(PixelIntensityMethod.Average);
image.Level(new Percentage(20), new Percentage(100));
image.Negate();
image.Normalize();
image.ReduceNoise();