1. A mobile device that captures images, the device comprising: a camera for capturing at least three images at different image exposure durations; and an image processing module for compositing the three captured images to generate a first composite image and modifying the first composite image to produce a second composite image, wherein modifying the first composite image to produce the second composite image comprises increasing a range of pixel values in a first set of regions of the first composite image and decreasing a range of pixel values in a second set of regions of the first composite image.