PDF accessibility : tools and challenges

This paper presents a comparison of different post-processing software tools to make PDF documents accessible. The comparison is based on different qualitative and verifiable criteria. In addition, this paper gives an overview of different standards of PDF accessibility for people with visual impairments using screen-reader software. PDF formats, potential barriers for visually impaired users, PDF accessibility standards, and available software solutions are described in more detail. A discussion including challenges for further work is presented at the end of the paper