1. A method, comprising: receiving, by a first mobile computing device, a plurality of local descriptors for a first plurality of keypoint features from a first image captured by a camera of a second mobile computing device; capturing, by a camera of the first mobile computing device, a second image, wherein the first image and the second image comprise a substantially common scene having an area of overlap; computing, by the first mobile computing device, a plurality of local descriptors for a second plurality of keypoint features from the second image; comparing each respective local descriptor from the plurality of local descriptors for the first plurality of keypoint features to each respective local descriptor from the plurality of local descriptors for the second plurality of keypoint features; determining, by the first mobile computing device, based at least in part on the plurality of local descriptors for the first plurality of keypoint features and the plurality of local descriptors for the second plurality of keypoint features, a relative pose of the first mobile computing device and the second mobile computing device; and communicating, by the first mobile computing device, to the second mobile computing device, an indication of the relative pose.