This book constitutes the refereed proceedings of the 6th International Conference on Document Analysis Systems, DAS 2004, held in Florence, Italy, in September 2004. The 31 revised full papers and 22 poster papers presented were carefully reviewed and selected from 79 submissions. The papers are organized in topical sections on digital libraries, historical documents, layout analysis, color documents, handwritten documents, graphics recognition, Internet documents, document analysis systems, and applications.