[accessibleimage] Re: Maps PC

I'd like to point out that using colors that translate to good gray scale 
contrast will also make these maps most accessible to totally blind people 
using the new ViewPlus IVEO technology.  A blind person can read this map 
with the IVEO Viewer, which starts by embossing the graphic on a ViewPlus 
embosser.  These embossers also use an algorithm to convert colors into 
gray scale, with very dark being embossed as big dots and very light being 
embossed as very light dots.

John


At 08:54 AM 1/11/2005, you wrote:
>Hi Lisa,
>
>My first question - how visually impaired are the persons for whom you
>are designing these maps?
>
>I've taken a quick look at Vischeck's web site and it looks intriguing.
>   The algorithm they described is certainly useful to change digital
>images (e.g. television screens) where you have no control over the
>colours coming in.
>
>As a cartographer, I would always adjust the colour of any map I made -
>whether a hard copy map or a digital map - to take into account the
>difficulties of those with colour blindness.  It can be a simple as
>using different colours and/or changing the value of those colours.
>
>If you are in control of the image - that is, if you are designing it
>yourself - the Vischeck software which simulates how your image would
>appear to a colour blind person can be very useful so that you know
>which colours to change.
>
>Then, if you don't have the knowledge or don't wish to correct the
>colours yourself, I can see that the Daltonize software (which corrects
>the image) would be a great help.
>
>Note, I'm not making any statement as to how well the algorithms work.
>I'd like to see some studies on their effectiveness.
>
>Hope that helps.  You can email me off-list if you have any more
>questions or want some other help in this area.
>
>Monika
>
>------------------------------------------------------------------
>Monika K. Rieger, Ph.D.
>Adjunct Professor
>Department of Geography
>The University of Calgary
>Calgary AB Canada  T2N 1N4
>
>e-mail: mkrieger@xxxxxxxxxxxxxxx
>Tel: 403-278-5069
>
>On Jan 11, 2005, at 6:21 AM, Lisa Yayla wrote:
>
> > Hi,
> > I'm making some maps for visually impaired persons to be displayed on a
> > PC. I was wondering if there is anyone with experience in this area.
> > Right
> > now am trying to get the colors right. Have come over a aid called
> > vischeck at http://www.vischeck.com/
> > It's a plug in to Photoshop and will take a image and simulate how it
> > is
> > seen by a person with different types of color blindness.
> > The maps are SVGs so that they can be enlarged, reduced, moved around
> > on
> > the screen and etc.
> > Appreciate any feed back.
> > Regards,
> > Lisa
> >
> >
> > Lisa Yayla
> > Huseby Kompetansesenter
> > Oslo Norway
> > lisa.yayla@xxxxxxxxxx
> >
> >

John A. Gardner
Professor and Director, Science Access Project
Department of Physics
Oregon State University
Corvallis, OR 97331
tel: (541) 737 3278
FAX: (541) 737 1683
        SAP URL: http://dots.physics.orst.edu/

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