{TAIL ~ A subject} is imaged at a predetermined time interval by a plurality of imaging units which obtains {HEAD ~ a plurality} of images having a parallax of a subject viewed from different viewpoints by imaging the subject from different viewpoints 
{ TAIL ~ A subject } is imaged at a predetermined time interval by a plurality of imaging units which obtains { HEAD ~ a plurality } of images having a parallax of a subject viewed from different viewpoints by imaging the subject from different viewpoints
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH