win_fourtr

 win_fourtr(hdi,hdo,s,sc,SigmaX,SigmaY)
      struct header *hdi, *hdo;
      Coord *s;
      int sc;
      double SigmaX, SigmaY;

• Input image.
• Output image.
• List of window centre corrdinates.
• Index in list of window centre corrdinates.
• Sigma X: parameter to the Gaussian window.
• Sigma Y.