The left hand and the right hand are 'mirror images' (of each other). = The left hand is the/a 'mirror image' of the right hand.
He's the 'mirror image' [=(more commonly) 'spitting image'] of his father. [=he looks just like his father]
She is worried about what motherhood will do to her 'image' [='reputation'] as a rock star.
(..) As a matter of fact, they are. Bow, barbarians. As you wish, Your Highness. Who's that, Mr. Peabody? That, Sherman, is the living image of Amun... son of Akhenaten, lord of the th Dynasty of the New Kingdom... King Tutankhamun. Otherwise known as "King Tut." (..)2014 Mr. Peabody & Sherman