A processing device includes a correction table memory which stores data regarding {HEAD ~ a relationship} between a predetermined number of discrete points and {TAIL ~ an equal number} of corrected points 
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A processing device includes a correction table memory which stores data regarding { HEAD ~ a relationship } between a predetermined number of discrete points and { TAIL ~ an equal number } of corrected points
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH