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Re: accessible images (diagrams)

From: David Woolley <forums@david-woolley.me.uk>
Date: Wed, 31 Mar 2010 15:46:16 +0100
Message-ID: <4BB36038.1030606@david-woolley.me.uk>
To: w3c-wai-ig@w3.org
Régis Diniz wrote:

> The idea is that diagrams like this: 
> http://upload.wikimedia.org/wikipedia/commons/7/72/ER_Diagram_MMORPG.png 
> must be accessible to them.

Starting from a decorated bitmap makes things difficult, especially 
where there are subtle colour distinctions, without corresponding shape 

You really need to start from a vector form of the image, e.g. SVG.

For an entity relationship diagram, like this, the really best approach 
is probably one of the standard textual formats for database schemas.
> We've been searching over the internet for solutions like a software 
> that would convert the image into tactile graphics or something like 

No.  The important thing for this is the topology, not the individual 
shapes, and, as noted, you are trying to process an image which is not 
in its original form, or shouldn't be in its original form.  Unless this 
is actually an on the fly conversion from SVG, etc. Wikipedia shouldn't 
really have accepted this image, as the standard position for open 
source files is that you should use the natural format for editing, and 
I hope they didn't create this graphic directly with a bitmap editor.

> this but it seems like there's not much information available. A sound 
> version of the graphic would solve the problem, but it's far nonpratical.
> Could anyone help us with some advices?
> Thanks in advance,
> Régis

David Woolley
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Received on Wednesday, 31 March 2010 14:46:50 UTC

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