34. The system of claim 33 , wherein the processing system is further adapted to create an input vector from the extracted physical attributes and to provide the input vector to a neural network to train the neural network to classify the document from one or more features of the input vector.
34. The system of claim 33 , wherein the processing system is further adapted to create an input vector from the extracted physical attributes and to provide the input vector to a neural network to train the neural network to classify the document from one or more features of the input vector. 48. The system of claim 34 , wherein the processing system further extracts lexical features from the scanned document, combines the extracted lexical features and extracted physical attributes into a unified set of features, and provides the unified set of features to the neural network to classify the scanned document.