11. A system comprising: a memory to store a document image; and one or more processors, operatively coupled to the memory, configured to: determine a language hypothesis for each text fragment in a plurality of text fragments identified from connected components in the document image; select a first subset of text fragments from the plurality of text fragments based on ratings for the language hypothesis of each text fragment in the plurality of text fragments; verify the language hypothesis of one or more text fragments in the first subset of text fragments based on optical character recognition of the one or more text fragments; and determine that Chinese, Japanese, or Korean (CJK) characters are present in the document image based on the verification of the language hypothesis of the one or more text fragments.
11. A system comprising: a memory to store a document image; and one or more processors, operatively coupled to the memory, configured to: determine a language hypothesis for each text fragment in a plurality of text fragments identified from connected components in the document image; select a first subset of text fragments from the plurality of text fragments based on ratings for the language hypothesis of each text fragment in the plurality of text fragments; verify the language hypothesis of one or more text fragments in the first subset of text fragments based on optical character recognition of the one or more text fragments; and determine that Chinese, Japanese, or Korean (CJK) characters are present in the document image based on the verification of the language hypothesis of the one or more text fragments. 13. The system of claim 11 , wherein the one or more processors are further configured 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.