- From: Andrew Kirkpatrick <andrew_kirkpatrick@wgbh.org>
- Date: Thu, 26 Jul 2001 16:23:50 -0400
- To: Terrie King <tking@ucp.org>, <w3c-wai-ig@w3.org>
Curious to see what these would look like, I made a demo that uses these images. You can see flickering images (in macromedia Flash) at 4, 7, 20, and 59 Hz at http://ncam.wgbh.org/richmedia/flicker_demo_start.html. The effect of all four together is awful, so I put a link next to each to see it by itself. That only makes it worse. Having made these and looked at them quite a bit today, I wholeheartedly support the WCAG and 508 screen flicker guidelines. I assume that these qualify as a violation of the rules...or does the whole screen need to flicker? http://ncam.wgbh.org/richmedia/flicker_demo_start.html Andrew On 7/24/01 10:44 AM, Terrie King (tking@ucp.org) wrote: > Okay, experts! I have been asked to put another agency's animated gif on my > Web site. I am hesitant to use it because of guideline 7.1--"Until user > agents allow users to control flickering, avoid causing the screen to > flicker." Here's the link to the checklist item: > http://www.w3.org/TR/WCAG10/wai-pageauth.html#tech-avoid-flicker > > How can I determine if the gif in question is within the guidelines? (gif > attached) If it is not, I guess I can ask for a non-animated gif. > > Terrie > > --------------------------------------------- > Terrie L. King > Internet Marketing Manager > > UCP National > 1660 L Street, NW, Suite 700 > Washington, DC 20036 > Ph: 800-872-5827 > Fax: 202-776-0414 > Web site: http://www.ucp.org > -- Andrew Kirkpatrick, Technical Project Coordinator CPB/WGBH National Center for Accessible Media 125 Western Ave. Boston, MA 02134 E-mail: andrew_kirkpatrick@wgbh.org Web site: ncam.wgbh.org 617-300-4420 (direct voice/FAX) 617-300-3400 (main NCAM) 617-300-2489 (TTY) WGBH enriches people's lives through programs and services that educate, inspire, and entertain, fostering citizenship and culture, the joy of learning, and the power of diverse perspectives.
Received on Thursday, 26 July 2001 16:24:25 UTC