wherein {HEAD ~ a voltage} corresponding to {TAIL ~ a difference} between the mean capacitance value for each pixel group at the second step and the capacitance calculated at the third step is detected, such that distortion of a fingerprint image formed by a dry or moist state of a finger brought into contact with the insulating layer surrounding the sensing electrodes can be corrected 
corresponding to
wherein { HEAD ~ a voltage } corresponding to { TAIL ~ a difference } between the mean capacitance value for each pixel group at the second step and the capacitance calculated at the third step is detected , such that distortion of a fingerprint image formed by a dry or moist state of a finger brought into contact with the insulating layer surrounding the sensing electrodes can be corrected
OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH