1. A computerized method for transforming digital images representing a plurality of individuals into one or more predictors of characteristics of a pair of individuals, comprising: for each individual of a plurality of pairs of individuals, storing one or more digital images representing the individual in a memory operably connected to a digital computer; annotating the one or more digital images with a plurality of reference points; associating a data set about the individual with the one or more digital images representing the individual; computing, with the digital computer, one or more metrics using measurements derived from the plurality of reference points; for each of the plurality of pairs of individuals, associating a pairwise data set about the pair with the one or more digital images representing the individuals comprising the pair; and determining one or more indicators usable for predicting characteristics of another pair of individuals, wherein the one or more indicators comprise one or more suitability indicators, and wherein determining one or more indicators further comprises: selecting at least one item from the group comprising the combination functions, the one or more principal indicators, and the one or more metrics; determining one or more suitability functions; and determining the one or more suitability indicators by combining the selected items according to the one of the determined suitability functions.