1. A computerized method for determining one or more predictors of one or more characteristics of an individual of a particular type based on digital images representing a plurality of individuals, comprising: for each of the plurality 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, using the digital computer, a plurality of metrics using measurements derived from the plurality of reference points; and determining, using the digital computer, one or more predictors for the one or more characteristic of the individual based on the one or more metrics, comprising: for each of the plurality of metrics, determining one or more relationships based on the particular metric computed for the plurality of individuals and the data sets about the plurality of individuals; and for each of the one or more predictors of the one or more characteristic of an individual of the type, selecting a combination of at least two of the plurality of metrics based on the determined relationships.