21. The computer readable medium of claim 19 , wherein the instructions are further to cause the one or more processors to: analyze features of a second subset of text fragments from the plurality of text fragments, different from the first subset of text fragments; determine a second value, different from the first value, of the document characteristic based on the analysis of the features of the second subset of text fragments; and reanalyze the features of the first subset of text fragments using the second value of the document characteristic.
19. The computer readable medium of claim 17 , wherein the instructions are further to cause the one or more processors to: analyze features of the first subset of text fragments; and determine a first value of a document characteristic of the document image based on the analysis of the features of the first subset of text fragments, wherein the determination of the language hypothesis of each text fragment is based on the first value of the document characteristic.