1. A method comprising: accessing multiple images each including multiple objects; making a determination, for each of multiple regions in the multiple images, of how good the region is perceived as being by a device; and generating a combined image from the multiple images based on the determinations of how good corresponding ones of the multiple regions in the multiple images are perceived as being, the generating including automatically selecting for inclusion in the combined image a region from one of the multiple images in which an object that is present in one or more corresponding regions of other images of the multiple images is absent, the generating further including automatically selecting the region in which the object is absent if the object that is present in the one or more corresponding regions of other images is not identified, based on information in an object database, as a known object.