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Thread: Policy Assistance
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From: Moore, Michael
Date: Wed, Jul 05 2006 9:30AM
Subject: Policy Assistance
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Good morning folks,
We are working on accessibility policy for our agency and have a
question about how to best convey the idea that things must be
accessible when using screen magnifiers as well as screen readers. We
have found through testing that when images are used to convey
information and the image does not scale well access is difficult or
impossible when using screen magnification alone.
Any suggestions would be greatly appreciated.
Mike Moore
From: Emma Duke-Williams
Date: Wed, Jul 05 2006 12:00PM
Subject: Re: Policy Assistance
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Hi Michael
I suspect you'll have to have some sort of technical guidelines in
place; from what I can see you've got a couple of alternatives.
1: Put the large version of the image in the page, but reduce it via
height/width settings to the size you want it;
advantage: When someone zooms, you won't get the scaling issues
disadvantage: Will take ages to download.
2: Have the image the size that you want & have a link to a larger
version - rather like using a thumbnail, so that people will have
access to the much larger one, so less need to enlarge & less
pixelation if they go bigger.
3: Combine the two in the way that they've done on the site that I
pointed out the other day:
http://persistent.info/files/20040508.magnifier/
The drawback is that you still have the download time issue, but it
looks neat & you've got a magnifier - however, rather than magnifying
the underlying image, it's showing you the same bit of the zoomed
version (which you can also see separately).
How you'd write a policy is another matter - if the policy is online
could you have some samples & get them to have a play & see what the
problem is so that they could select the best solution (also showing
them the issues that arise when you use the zoom in Opera?)??
Emma
On 7/5/06, Moore, Michael < = EMAIL ADDRESS REMOVED = > wrote:
> Good morning folks,
>
> We are working on accessibility policy for our agency and have a
> question about how to best convey the idea that things must be
> accessible when using screen magnifiers as well as screen readers. We
> have found through testing that when images are used to convey
> information and the image does not scale well access is difficult or
> impossible when using screen magnification alone.
>
> Any suggestions would be greatly appreciated.
>
> Mike Moore
>
>
>
>
--
Blog: http://www.tech.port.ac.uk/staffweb/duke-wie/blog/