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