a shake level determination step of determining {HEAD ~ a shake level} of an image capturing apparatus based on {TAIL ~ an output} of said shake detection step 
based on
a shake level determination step of determining { HEAD ~ a shake level } of an image capturing apparatus based on { TAIL ~ an output } of said shake detection step
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH