It is a difficult task, and the degree of success is highly dependent on the type of source material. (The demo’s on their site show “best case” results).
Robert J. H. posted an experimental tool that may be of interest. Refer to the notes in this topic for downloading and how to use. I know no more about it than is written there, but if you have questions about the tool then Robert may be able to help (he still visits the forum fairly regularly).