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