I read this article and thought it was an interesting concept for writers.
Filmmakers use a term called “image systems,” and novelists can benefit greatly by creating a similar kind of image system for their novel.
Just What is an Image System?
Think of the overall message coming through your novel. What themes are you honing in on? What controversial issues or moral dilemmas are you presenting? What is the “take-home” feeling you want to leave with your reader after she finishes reading the last page. Asking these questions can help you step back and look at the tone, mood, and intent of your story. See more.