Samsung thinks the strangers who take pictures of you could do a better job@ 2013/05/24
The patent application also talks of editing the overlay, such as adding a circle to show the photographer where you'd like your face to be in relation to the backdrop. If you want the passerby to know how well they're doing, the claims explain an on-screen "composition score" that would rate their lining-up skills. And, if you'd rather trust the final decision to the camera, a ball-in-the-hole scenario is described that'll automatically engage the shutter release when the live view matches your ideal layout. This is just words and a few diagrams at this stage, mind, but if the patent gets granted, we could eventually see such a feature added to Samsung's smartphones or Galaxy cameras. Until then, you'll just have to put your trust in strangers and hope they have at least a basic understanding of the rule of thirds.