[accessibleimage] Re: Maps PC

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
>
>

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