42. An apparatus for highlighting and categorizing images from a document using a sequence of word tokens, the word tokens comprising character shape code classes, each word of the document being represented by only one word token, the apparatus comprising: means for eliminating predetermined character shape code classes from said sequence of word tokens; means for removing predetermined common function word tokens from said sequence of word tokens to form a reduced sequence of word tokens using a pattern matching technique and a stop token list; means for determining word token frequency appearance rates for the word tokens of the reduced sequence; means for ranking said frequency of appearance rates; means for determining the nth or more most frequently appearing word tokens based on the ranked frequency of appearance rates; and means for categorizing the document into one of a plurality of pre-existing categories.
42. An apparatus for highlighting and categorizing images from a document using a sequence of word tokens, the word tokens comprising character shape code classes, each word of the document being represented by only one word token, the apparatus comprising: means for eliminating predetermined character shape code classes from said sequence of word tokens; means for removing predetermined common function word tokens from said sequence of word tokens to form a reduced sequence of word tokens using a pattern matching technique and a stop token list; means for determining word token frequency appearance rates for the word tokens of the reduced sequence; means for ranking said frequency of appearance rates; means for determining the nth or more most frequently appearing word tokens based on the ranked frequency of appearance rates; and means for categorizing the document into one of a plurality of pre-existing categories. 44. The apparatus according to claim 42, further comprising means for highlighting words of the document corresponding to the nth or more most frequently appearing word tokens.