If, in the second image, {HEAD ~ the user} selects {TAIL ~ only a section} around the position of a cell in the first image, then the computing power or time required for segmentation can be additionally reduced 
selects
If , in the second image , { HEAD ~ the user } selects { TAIL ~ only a section } around the position of a cell in the first image , then the computing power or time required for segmentation can be additionally reduced
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH