1. A system comprising a processor and logic in and/or executable by the processor to cause the processor to: initiate a capture operation using an image capture component of a mobile device, the capture operation comprising; capturing video data; and estimating a plurality of motion vectors corresponding to motion of the image capture component during the capture operation; detect a document depicted in the video data; track a position of the detected document throughout the video data; select a plurality of images using the image capture component of the mobile device, wherein the selection is based at least in part on: the tracked position of the detected document; and the estimated motion vectors; and generate a composite image based on at least some of the selected plurality of images; wherein the document is a long document; and wherein the composite image is characterized by a resolution sufficient for downstream processing.