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