public readonly GrayAlpha16 ToGrayAlpha16() => PixelHelper.ToGrayAlpha16(this);
public readonly GrayF ToGrayF() => PixelHelper.ToGrayF(this);
public readonly Gray16 ToGray16() => PixelHelper.ToGray16(R, G, B);
public readonly Gray8 ToGray8() => PixelHelper.ToGray8(this);
public readonly Gray8 ToGray8() => PixelHelper.ToGray8(R, G, B);