@BOOK{4068700r,
   AUTHOR =      {Rafael Gonzalez and Richard Woods},
   authorfa =    {r and r },
   TITLE =       {Digital Image Processing},
   PUBLISHER =   {Prentice-Hall, Inc.},
   YEAR =        {2006},
   ISBN =         {013168728X},
   EDITION =     {3rd},
   ADDRESS =     {Upper Saddle River, NJ, USA}
  }