1. A method for selecting fields of an electronic form for automatic: population with candidate text segments that are obtained by capturing an image of a document, applying optical character recognition to the captured image to identify textual content, and tagging candidate text segments in the textual content for fields of the form, the method comprising: for each of a plurality of fields of an electronic form, computing a field exclusion function based on at least one parameter selected from: a text length parameter, an optical character recognition error rate, a tagging error rate, and a field relevance parameter; and determining whether to select the field for automatic population based on the computed field exclusion function.