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.
(..) Eunuch. My name is Will Turner. My father was Bootstrap Bill Turner. His blood runs in my veins. He's the spitting image of old Bootstrap Bill come back to haunt us. On my word, do as I say, or I'll pull this trigger and be lost (..)2003 Pirates of the Caribbean: The Curse of the Black Pearl