{HEAD ~ The method} 7, wherein the step of extracting {TAIL ~ the horizontal line information} comprises: 
{ HEAD ~ The method } 7 , wherein the step of extracting { TAIL ~ the horizontal line information } comprises :
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH