code: private static int computeE7(int d, int e, int f, int g, int h, int i)
      {
          if (d == h && e != i || h == f && e != g)
          {
              return h;
          }
          return e;
      }
docs: Compute E7 pixel.
  
  @param d The d value.
  @param e The e value.
  @param f The f value.
  @param g The g value.
  @param h The h value.
  @param i The i value.
  @return The computed value.