In some cases, images of the eyes produced by a camera used for eye tracking can be some distance from the eyes of a user. As a result, the images of the eyes produced by the camera can poor resolution. With the techniques disclosed herein, eye image processing can be used to substantially identify a pointing direction of the eye and additionally or alternatively enhance the resolution of eye image for iris code generation. Systems and methods for eye image set selection, eye image collection, and eye image combination are described. Embodiments of the systems and methods for eye image collection can include displaying a graphic along a path connecting a plurality of eye pose regions. Eye images at a plurality of locations along the path can be obtained, and an iris code can be generated based at least partly on at least some of the obtained eye images.
