public float[] getNormalizedComponents (Object pixel, float[] normComponents, int normOffset)
public float[] getNormalizedComponents(int[] components, int offset, float[] normComponents, int normOffset)
  public float[] getNormalizedComponents (Object pixel,                                          float[] normComponents,                                          int normOffset)  {    // subclasses has to implement this method.    throw new UnsupportedOperationException();  }