1. A method for document image acquisition and retrieval comprising: automatically acquiring image logs comprising image data and associated records for documents being processed by a plurality of image output devices within an organization; archiving the image logs for the processed documents in a computer-readable storage medium; when a request for document production is received by the organization for discovery of responsive documents in litigation, with a computer processor, automatically filtering the image logs, through a first classifier trained to return documents that are responsive to the document production request and a second classifier trained to return those of the responsive documents that are privileged, the privileged documents comprising attorney-client exchanges, the first and second classifiers having been trained through a machine learning method with training examples of the documents labeled with respective classes; and outputting responsive documents.