1. A computer-implemented method for identifying a field in each of a plurality of form images, the method comprising: receiving, at one or more processors, the plurality of form images, each form image including a plurality of strokes; generating, with the one or more processors, a stroke bounding box for each set of strokes identified in the plurality of form images based on a distance between strokes being within a threshold, each stroke bounding box encompassing a corresponding set of strokes and having associated size and position information; generating, with the one or more processors, an overlay of the plurality of form images; identifying, with the one or more processors, a group of overlapping strokes from the overlay of the plurality of form images by identifying sets of strokes that overlap each other in the overlay based on stroke bounding box size and position information; generating a field bounding box based on an average size and position of stroke bounding boxes associated with the group of overlapping strokes, the field bounding box representing the field in each of the plurality of form images; and generating a plurality of field images from the plurality of form images based on the field bounding box.