1. A computer-implemented method comprising: determining, by a computing system, a first distance metric between a first multi-dimensional vector and a second multi-dimensional vector, wherein the first multi-dimensional vector is based on provision of a first image including a detected first set of poselets associated with a first user into a first instance of a neural network and the second multi-dimensional vector is based on provision of a second image including a detected second set of poselets associated with a second user into a second instance of the neural network; determining, by the computing system, a second distance metric between the first multi-dimensional vector and a third multi-dimensional vector, wherein the third multi-dimensional vector is based on provision of a third image including a detected third set of poselets associated with a third user into a third instance of the neural network; and modifying, by the computing system, the neural network to cause the first distance metric to be less than the second distance metric.