1. A system implemented at least partially in hardware and operative in a digital medium environment to organize photographs into person-based groups using facial recognition technology and redundant analysis to reduce duplicative groupings, the system comprising: a face detection module implemented at least partially in hardware of a computing device to detect faces in multiple photographs; a face characterization module implemented at least partially in hardware of the computing device to calculate facial representations of the faces detected in the multiple photographs; a face grouping module implemented at least partially in hardware of the computing device to perform at least one grouping operation including: comparing a detected face to a first group and a second group of the person-based groups, the comparing including: calculating a first similarity score of the first group, the first similarity score based on a comparison of the detected face with the first group; and calculating a second similarity score of the second group, the second similarity score based on a comparison of the detected face with the second group; comparing the first similarity score with the second similarity score; and assigning the detected face to the first group based on the comparing and establish a group relationship indicator based on the at least one grouping operation, the group relationship indicator linking the first group to the second group based on a comparison of the second similarity score with a grouping threshold; and a group merging module implemented at least partially in hardware of the computing device to perform at least one merging operation to conditionally merge the first group with the second group based on the group relationship indicator.