Talk given at the BOBCATSSS 2015 conference - http://www.bobcatsss2015.com/. This contribution will define users with visual impairments and divide them into categories according to functional criteria. We will focus on methods of haptization and audialization of information for visually impaired users and define and classify documents that are created by the haptization and audialization of information.

1. Revisualization and de-visualization of data:
transformation of visual data into information for
visually impaired users
PhDr. Jiří Stodola, PhD.

2. Masaryk university
Support Centre for Students
with Special Needs
Division of Informatinon Studies
and librarianship

3. Introduction
 90 % of information through the eyesight
 data are transformed into structured information
through visualization
 visually impaired – transformation of visual data
into forms that are accessible for perception
through senses other than the eyesight
 different types of documents intended for users
with visual impairments

4. Levels of visual impairment
 mild to no visual impairment,
 moderate visual impairment,
 severe visual impairment,
 blindness 1 (practical blindness),
 blindness 2 (legal blindness),
 blindness 3 (total blindness).

5. Visually impaired user
 user who works with information in a modified
visual form or in a form other than visual
 works with modified visual information (category 0.-3.
according to WHO),
 works exclusively with non-visual information
(category 4.-5. according to WHO).

6. Transformation of visual data
 turning visual data into
 modified visual information = revisualisation
 non-visual information = de-visualization
 visual data
 textual
 image

7. Transformation of visual data

8. Revisualization of visual textual data
and image data
 enlarged printing
 camera magnifying glass
 applications to enlarge the operating system
environment

9. Haptization of visual textual and image
data
 Braille (Braille display)
 tactile graphic
 vacuum forming
 thermal fuser

10. Audialization of visual textual data
 non-musical sound document
 screenreader and voice syntetizer
 hybrid book

11. Textualization of visual image data

12. Documents for visually impaired
1. Visual textual (enlarged letters) and image
documents (enlarged graphics, enlarged
cartographic documents)
2. Spoken audio documents (audio book) and
music documents
3. Tactile textual (Braille publications) and image
documents (tactile maps, tyflographics)
4. Combined documents (they allow output for
sight, hearing and touch – electronic resources)

13. Hybrid book

14. According AACR2
 Books printed with enlarged letters
 Tactile books
 Electronic books
 Enlarged cartographic documents
 Tactile cartographic documents
 Electronic cartographic documents
 Music documents printed with enlarged letters
 Tactile music documents
 Electronic music documents
 Non-musical audio documents (audio books, audio documents continued)
 Electronic non-musical audio documents (electronic audio books, electronic audio continued
documents),
 Enlarged graphic documents
 Tactile graphic documents
 Electronic graphic documents
 Electronic resources
 Three-dimensional documents (tactile models)
 Continuing sources printed in enlarged text
 Tactile continuing resources
 Electronic continuing resources

15. Conclusion
 the more amount of visual (especially)
information we produce, the greater information
deficit of visually impaired people will be.
 revisualization and de-visualization is time-
consuming and costly
 in all cases where there is data visualization, it is
really necessary to express them in this way
 do we not simplify dangerously intricately
structured reality by that that we reduce it to
spatial relationships