DynamicCrop works by interactively letting the user choose an area to crop. This area is displayed with reduced contrast. However, wouldn't it make more sense to reduce the contrast (and/or brightness!) of the area
outside the crop? Cropping is useful not only for easily getting rid of unwanted things near the borders, but it's also a composition tool. It's useful to be able to concentrate on the resulting image by having it displayed unmodified, while the uninteresting parts are obscured.
And, since it's a composition tool, it could very well display a couple of vertical and horizontal lines at 33/67% of width/height. Or maybe at Fibonacci's 38.2/61.8%. Those would also help when a diurnal landscape image is tilted and we want to rotate it to get a horizon that honours it's name
.
