Once {HEAD ~ the CAD scheme} is optimized, to process {TAIL ~ a digital image}, an image characteristics based classification criteria is established for that image, and then global image features of the digitized image are determined 
is optimized to process
Once { HEAD ~ the CAD scheme } is optimized , to process { TAIL ~ a digital image } , an image characteristics based classification criteria is established for that image , and then global image features of the digitized image are determined
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH REL 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