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Translating Visual
Information into Tactile
Information
Nicole Johnson
Vernée Hemphill
Wendy Holden
Central Access
• Central Washington
University
• Produces Alternative Media
• Edited Word Documents
• HTML
• Audio Files
• Braille
• Tactile Graphics
• Student Based Workforce
Quick Notes
•We require a simplified process due to
• Volume of material being produced at a time
• Student technicians
•Evolution to improve product
• Student employee as a consultant
• Feedback from users
What are tactile graphics?
•Starting with an image, translating the information to be
felt not seen
When are they helpful?
• When image descriptions become convoluted
When are they not helpful?
• When images can be described with text alone
Methods of Production
• Vacuum-form copy from
collage/tooling or
embossed plus collage
• Embossed
• Microcapsule
Source: https://www.teiresias.muni.cz/en/library-and-publishing/services/tactile-graphics/embossed-graphics
Microcapsule:
Reactive paper that causes ink to swell under heat
Basics
•Awareness of level/type of content
•Identify relevant information
•Strip down visual elements
What should
be included,
and what
should be
omitted?
Technical Details
A “language” of common elements
for graphics
Textures
• Comparable to
“colors”
• Used to
differentiate objects
• Just because the
graphic uses different
colors doesn’t mean
that textures are
needed
Textures are helpful to distinguish
different parts of a graphic
Standardized Tools
• Template
• Common braille
letters/numbers
• Dots
• Label line
Standardized Tools
• 2-4 line point
• Commonly used
dashed lines
• Specific arrows
White Backing Lines!
Hugely important
so swelled ink will
not bleed together
Combining
descriptions
with tactiles
Transcribers notes
are useful in
graphics to explain
orientation
Using Keys
• Braille takes up a lot of
space, it’s often
necessary to include a
text key with the graphic
• We are still in the
process of adapting the
BANA standard for key
and graphic orientation
Source: http://www.brailleauthority.org/tg/web-manual/index.html, unit 5
In-Graphic Keys
•Always located at
the top of the
graphic, under the
title
•Labeled “Key:”
Representing
information
as a table
• These graph values
can be transcribed
into tables, and
included on a key
Splitting graphics into multiple parts
Tactile senses are different than sight, an eighth
of an inch is as small as fingers can distinguish.
Sometimes you can’t fit all the necessary
information onto one swell sheet.
Where do you
even start?
It’s helpful have
the first graphic
of a series outline
the overall layout
of the graphic,
and include
corresponding
page number
references
Alternative option for low vision
• Variety of font
options
• Does not need to
know braille
Methods for handling and organizing
hundreds of graphics at a time
Summary
• Tactile graphics are a method for translating visual information into
tactile information.
• Start by identifying relevant information and simplifying visual
elements.
• Convey information using consistent elements such as textures and
specific line weights and dashes.
• Consider using keys or multiple parts if there is too much information
to fit on one swell sheet.
• Large print is an option for low vision.
Limitations of 2.5d tactiles when dealing with 3d images
• New 3d printing technology is an exciting option
Sample tactile graphics are
available in the back with our
contact information
CentralAccess@CWU.edu

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Translating visual information into tactile information

Editor's Notes

  1. Add images of stages of tactile graphics, PDF, Illustrator and Swelled
  2. Image of Vacuum form copy (map)?
  3. Before and after images