1. An apparatus, comprising: at least one processor; and an imaging subsystem configured to accept a sample that includes a plurality of discrete components, and capture images of the plurality of discrete components, wherein the plurality of discrete components have fluorescence material associated therewith; wherein the at least one processor is configured to: determine locations of selected ones of the plurality of discrete components within a first image of the captured images; calculate a transform that includes a radial component and a constant component, the radial component being proportional to a distance between the locations of the selected ones within the first image and a center of the first image; and determine estimated locations of the selected ones within a second image of the captured images by applying the transform to the locations of the selected ones within the first image.