RE: Gaussian blur as testing tool

Hi Jon,

Sure, I realise there are other factors, but it might be a useful method/tool for Silver. E.g. assessing whether a font is too thin might be easier from this type of evaluation compared to analysing factors in a typeface.

Cheers,

-Alastair


From: Jonathan Avila <jon.avila@levelaccess.com>
Sent: 25 November 2020 19:04
To: Alastair Campbell <acampbell@nomensa.com>; public-low-vision-a11y-tf <public-low-vision-a11y-tf@w3.org>
Subject: RE: Gaussian blur as testing tool

I'd just add that there are many other factors other than acuity that play a part including field of vision, blind spots, cataracts, contrast sensitivity, color perception, glare sensitivity, etc.  These are covered in the low vision user requirements documents.

Thanks for sharing the resource.

Jonathan

From: Alastair Campbell <acampbell@nomensa.com<mailto:acampbell@nomensa.com>>
Sent: Wednesday, November 25, 2020 1:51 PM
To: public-low-vision-a11y-tf <public-low-vision-a11y-tf@w3.org<mailto:public-low-vision-a11y-tf@w3.org>>
Subject: Gaussian blur as testing tool

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Hi folks,

I don't know if anyone else was attending Techshare this year, but  I saw Dr Sam Waller's presentation which was about using Gaussian blur to test text & icon visibility. (He's at the Cambridge (UK) University Engineering Design Centre http://www.cedc.tools/)

I'm not going to do it justice here, but the thing that stood out to me was that:
If you know the testers visual acuity (established by which line of text they could read on a chart), you can then apply a gaussian blur to an interface to reduce that acuity by a standardised amount. Then review the text and other items that need differentiation for use with low-vision.

I got in touch to see if there was interest in using that as a tool in Silver and we're looking to set up a meeting soon.

Please let me know if you'd like to be involved, it will probably be as part of a Silver sub-group.

Kind regards,

-Alastair

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