1. One or more computer-readable hardware media storing instructions that, when executed by a computing device, perform a method of generating a high dynamic range digital image, the method comprising: performing motion analysis relative to a reference image in a set of plural digital images depicting a scene, the motion analysis comprising determining image differences, relative to the reference image, for respective non-reference images in a plurality of non-reference images in the set; for the respective non-reference images: determining a plurality of corresponding locations between the reference image and the non-reference image based at least in part on the motion analysis; for each of the plurality of corresponding locations, comparing a sample value of the reference image and a sample value of the non-reference image; and based on the comparing of the sample values for each of the plurality of corresponding locations, deriving a single relative exposure level for the non-reference image as a whole relative to the reference image; and based at least in part on the relative exposure levels of the non-reference images, integrating the set of plural digital images to form a higher dynamic range digital image depicting the scene.