W3C home > Mailing lists > Public > w3c-wai-gl@w3.org > July to September 2002

RE: Checkpoint 2.3 Avoid causing the screen to flicker - Test?

From: Wendy A Chisholm <wendy@w3.org>
Date: Wed, 10 Jul 2002 17:39:07 -0400
Message-Id: <5.1.0.14.2.20020710173644.04695530@localhost>
To: GV@TRACE.WISC.EDU, gian@stanleymilford.com.au, graham_oliver@yahoo.com, w3c-wai-gl@w3.org

I don't know about strobes, but as I reported in June [1] there is a tool 
available. I still have not played with it. But info is available at [2].

Could someone find out how much it costs and what exactly it does?

--wendy

[1] http://lists.w3.org/Archives/Public/w3c-wai-gl/2002AprJun/0395.html
[2] http://www.hardingfpa.co.uk/

At 10:36 PM 7/7/02, Gregg Vanderheiden wrote:

>I'm not sure I follow.  Strobes are great for freezing (visually) and
>measuring the period of something which is moving repetitively, but I
>don't know how you use a strobe to measure a strobe.  I can sort of see
>how you might, but don't see how it could be more effective or easier
>than just using a light probe and looking at the events on an
>oscilloscope (storage).   (or, for that matter, just capturing the
>information using a computer as a storage oscilloscope.)
>
>I don't recall anyone talking to me about using a strobe to measure
>flash frequency.  But Trace is looking into the idea of a measurement
>tool to address photosensitive epilepsy.   Have made progress and
>contacts but don't yet have any determination of do-ability,
>effectiveness, or timeline.
>
>More when I know more.
>
>Gregg
>
>------------------------------------
>Gregg Vanderheiden Ph.D.
>Ind Engr - Biomed - Trace,  Univ of Wis
>gv@trace.wisc.edu
>
>
>
>
> > -----Original Message-----
> > From: w3c-wai-gl-request@w3.org [mailto:w3c-wai-gl-request@w3.org] On
>Behalf
> > Of gian@stanleymilford.com.au
> > Sent: Sunday, July 07, 2002 6:41 PM
> > To: graham_oliver@yahoo.com; w3c-wai-gl@w3.org
> > Subject: RE: Checkpoint 2.3 Avoid causing the screen to flicker -
>Test?
> >
> > Graham,
> >
> > We have discussed this briefly, and one of the problems is strobing
>due
> > to faulty/older monitors. You would need to decide on one
>version/brand
> > computer to use in the test. Unfortunately you can't test for
> > everything!
> >
> > Having said that, I still think it is a good idea, and I seem to
>recall
> > Geoff trying to get TRACE in on this.
> >
> > Cheers,
> > Gian
> >
> > > -----Original Message-----
> > > From: graham.oliver [mailto:graham_oliver@yahoo.com]
> > > Sent: Thursday, 27 June 2002 9:12 PM
> > > To: w3c-wai-gl
> > > Subject: Checkpoint 2.3 Avoid causing the screen to flicker - Test?
> > >
> > >
> > >
> > > Er this could be daft (and may reflect the fact that I
> > > have been out of the loop for a while) but couldn't
> > > you use a stroboscope, to test the frequency of
> > > flicker or flash?
> > >
> > > Cheers
> > > Graham
> > >
> > >
> > >
> > > =====
> > > 'Making on-line information accessible'
> > > Phone : +64 9 360 1265 - New Zealand
> > >
> > > __________________________________________________
> > > Do You Yahoo!?
> > > Everything you'll ever need on one web page
> > > from News and Sport to Email and Music Charts
> > > http://uk.my.yahoo.com
> > >
> > >
> > >

-- 
wendy a chisholm
world wide web consortium
web accessibility initiative
seattle, wa usa
/--
Received on Wednesday, 10 July 2002 17:29:27 GMT

This archive was generated by hypermail 2.2.0+W3C-0.50 : Monday, 7 December 2009 10:47:19 GMT