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.
(..) - Yes! I said that you had a nice butt, it's just not a great butt. Oh, you wouldn't know a great butt if it came up and bit ya. There's an image. Would anybody like more coffee? Did you make it, or are you just serving it? - I'm just serving it. - Yeah. Yeah, I'll have a cup of coffee. (..)1994 TvShow: Friends Title: The One Where Monica Gets a Roommate Season: 1 Episode 1