1. An image registration method, comprising: obtaining positional information from one or more positional sensors of a device; obtaining first and second images from the device; aligning a plurality of regions in the first image with a corresponding plurality of regions in the second image to identify a plurality of corresponding regions; determining a search vector for each of the plurality of corresponding regions, wherein the act of determining a search vector comprises determining a direction that a feature in the first image would need to move to align with a corresponding feature in the second image; selecting only those corresponding regions from the plurality of corresponding regions having a search vector consistent with the positional information to identify a plurality of consistent regions, wherein the act of identifying a plurality of consistent regions comprises discarding regions having a search vector opposed to or substantially opposed to a direction of movement indicated by the positional information; and registering the first and second images using the plurality of consistent regions.