1. A computer-implemented method comprising: extracting facial features of a collection of digital photos; clustering the collection of digital photos into a plurality of face groups, at least first and second face groups of the plurality of face groups each including multiple digital photos, each photo having a facial feature satisfying a programmed facial similarity requirement; associating an annotation with the at least first face group; adding the second face group to the first face group; and responsive to the adding, automatically associating the second face group with an annotation of the first face group.
1. A computer-implemented method comprising: extracting facial features of a collection of digital photos; clustering the collection of digital photos into a plurality of face groups, at least first and second face groups of the plurality of face groups each including multiple digital photos, each photo having a facial feature satisfying a programmed facial similarity requirement; associating an annotation with the at least first face group; adding the second face group to the first face group; and responsive to the adding, automatically associating the second face group with an annotation of the first face group. 12. The method as recited in claim 1 , further comprising clustering the collection of digital photos into a plurality of event/location group; and associating an event/location annotation with the at least one event/location group.