Revisualization and de-visualization of data: transformation of visual data into information for visually impaired users

PhDr. Jiří Stodola, PhD.

Masaryk university

Support Centre for Students with Special Needs

Division of Informatinon Studies and librarianship

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

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).

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).

Transformation of visual data turning visual data into

modified visual information = revisualisation non-visual information = de-visualization

visual data textual image

Transformation of visual data

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

environment

Haptization of visual textual and image data Braille (Braille display) tactile graphic

vacuum forming thermal fuser

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

Textualization of visual image data

Documents for visually impaired1. 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)

Hybrid book

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

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