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