/// <summary>
/// The distortion.
/// </summary>
/// <param name="chain">
/// The chain.
/// </param>
/// <param name="alphabet">
/// The alphabet.
/// </param>
/// <returns>
/// The <see cref="double"/>.
/// </returns>
public override double Distortion(ComplexChain chain, FrequencyDictionary alphabet)
{
return depth.Calculate(chain.Original(), chain.Anchor); // - gamutDeep.Calculate(chain);
}