if there is another part of the frame you'd like to accentuate, you can make a mask that brightens the part of the image you want to emphasize and diminishes the contrast of the part you don't. They did alot of this in The Brothers Grimm. I also saw a bunch of it in the BTS from the Panic Room uber special edition. Just a separate layer composited over the image with an opacity. Put a white shape on a black background with a fuzzy edge.