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