Thread Subject: Re: Photo-Seizure Language

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From: Whitney Quesenbery
Date: Mon, Jul 02 2007 6:00 AM

I think they should be kept together, but reworded slightly. What we have
is an important general rule (no more than 3 times/second) with has some
exceptions.

Products must not flash more than 3 times in any one second period, unless:

* Flashing created by software is under the general flash and red flash
threshold.

* Flashing created by hardware is either:
** greater than YYY candelas; or
** greater than 20 candelas/sq meter and contiguously occupies more than a
total of .006 steradians (25% of any 10 degree visual field).

At 06:10 AM 7/2/2007, Andi Snow-Weaver wrote:

>Gregg
>
>Since the software and hardware requirements are not identical, then why
>don't we keep the software provision in the software section and the
>hardware provision in the hardware section?
>
>Andi
>
>
>
>
> Gregg
> Vanderheiden
> < = EMAIL ADDRESS REMOVED = To
> u> "'TEITAC General Interface
> Sent by: Accessibility Subcommittee'"
> teitac-general-bo < = EMAIL ADDRESS REMOVED = >
> = EMAIL ADDRESS REMOVED = cc
> .org
> Subject
> [teitac-general] Photo-Seizure
> 07/01/2007 11:26 Language
> PM
>
>
> Please respond to
> TEITAC General
> Interface
> Accessibility
> Subcommittee
> <teitac-general@l
> ist.teitac.org>
>
>
>
>
>
>
>We are supposed to come up with language for general coverage of seizure
>disorders..
>
>We have agreed to follow the Web language (except tweaked to fit 508 -
>e.g. imperative voice and use of â??mustâ??)
>
>For hardware we talked of restricting this to only severe problems so that
>LEDs etc are clearly NOT covered.
>
>The approach below eliminates all small flashing objects unless they are
>VERY bright (like a flash tube) ­ or veryy large ( so it would be comparable
>to the software provision).
>
>If this looks OK we can go with this as a placeholder for our next draft
>and work to figure out the proper YYY value and language.
>
>---------------
>
>Photo-Seizure
>Product software must not flash more than 3 times in any one second period
>unless the flash is under the general flash and red flash threshold.
>Product hardware must not flash more than 3 times in any one second period
>if the flash either:
> is greater than YYY candelas; or
> is greater than 20 candelas/sq meter and contiguously occupies more
> than a total of .006 steradians (25% of any 10 degree visual field).
>
>
>
>Gregg
>
>------------------------
>Gregg C Vanderheiden Ph.D.
>Professor - Depts of Ind. Engr. & BioMed Engr.
>Director - Trace R & D Center
>University of Wisconsin-Madison
><http://trace.wisc.edu/> FAX 608/262-8848
>DSS Player at http://tinyurl.com/dho6b
>If Attachement is a mail.dat try http://www.kopf.com.br/winmail/
>
>
>
>
>

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