/// <inheritdoc/> public Bitmap ApplyUnary(Bitmap bmp, StructElem kernel, (int width, int height) dim, MorphOperator filter)
/// <summary>
/// A factory method
/// where the <see cref="StructElem"/> represents an
/// enumeration for the types implementing the <see cref="IStructuringElementFactory"/>.
/// </summary>
public IStructuringElement Get(StructElem element)
=> element
switch
{
