- From: Gregg C Vanderheiden <greggvan@umd.edu>
- Date: Wed, 8 Feb 2017 13:11:37 -0500
- To: Detlev Fischer <detlev.fischer@testkreis.de>
- Cc: GLWAI Guidelines WG org <w3c-wai-gl@w3.org>, Jonathan Avila <jon.avila@ssbbartgroup.com>
- Message-Id: <B582189B-0785-4971-B2AB-F140223EA9FB@umd.edu>
Just some thoughts. if they are open captions — then mandating contrast mandates that captions be of the kind that have a block of solid color behind the text, hiding the scene - since there is no way to really control the background otherwise. This is not the preferred captioning for most people because it blocks the scene. But most captions are closed captions — which means that they are generated by the player - outside of the control of the author (e.g. the presentation is a function of the user agent) - and users can choose to have captions be large or small, with background or without. What is not clear to me is what control the page author has of the viewer that will be used. how much control does the author have over which viewer is used — and the features of the viewer? types of caption features (background/transparent, size, color, position, etc) what about the content viewed on different platforms with different viewers? how much can we require authors to use particular viewers with particular capabilities Gregg C Vanderheiden greggvan@umd.edu > On Feb 8, 2017, at 3:51 AM, Detlev Fischer <detlev.fischer@testkreis.de> wrote: > > I can't see why poor contrast of captions should not fail SC 1.4.3. Why just advisory? Captions are clearly a form of text, and screenshots can provide clear evidence of failure. > In audits I frequently see white caption text on transparent grey background which means contrast is FAR below 4.5:1 whenever the video background happens to be bright. > Detlev > > -- > Detlev Fischer > testkreis c/o feld.wald.wiese > Thedestr. 2, 22767 Hamburg > > Mobil +49 (0)157 57 57 57 45 > Fax +49 (0)40 439 10 68-5 > > http://www.testkreis.de <http://www.testkreis.de/> > Beratung, Tests und Schulungen für barrierefreie Websites > > Jonathan Avila schrieb am 07.02.2017 18:14: > >> >> David, I have not failed videos with insufficient contrast. However, that situation and open captions with poor contrast are something I would point out as advisory or best practice. >> >> >> >> Jonathan >> >> >> >> From: David MacDonald [mailto:david100@sympatico.ca] >> Sent: Tuesday, February 07, 2017 6:50 AM >> To: Glenda Sims; Gregg C Vanderheiden; Jonathan Avila >> Cc: Aparna Pasi; WCAG >> Subject: Re: does anyone currently fail colour contrast for text in timed media >> >> >> >> >> Thanks Glenda >> >> >> >> >> >> Hey Gregg, I'll loop you in. >> >> >> >> >> >> Yes, I agree audio description (or transcript) should reflect important visual information including text, but I'm thinking about 1.4.3 Colour contrast of text in movies ... In this case it's yellow text on the whiteboard in an animated movie. >> >> >> >> >> >> Here's my take. >> >> >> >> >> >> 1.4.3 applies to "images of text" which have been "rendered in a non-text form *in order to achieve a particular effect* ..." >> >> >> >> >> >> So the glossary is assigning an intention to the creation of the text. The author put it in an image because she wanted it in a special font, or a special position in relation to a background which might have been hard to do with CSS etc... This is not the case for a movie. Authors rarely make movies with the intention of achieving a particular text effect. >> >> >> >> >> >> I haven't been watching movies looking for colour contrast failures of significant text. I was wondering if any others (Glenda, Jon, John, Gregg, etc.) would agree. >> >> >> Cheers, >> David MacDonald >> >> >> >> CanAdapt Solutions Inc. >> >> Tel: 613.235.4902 >> >> LinkedIn <http://www.linkedin.com/in/davidmacdonald100 <http://www.linkedin.com/in/davidmacdonald100>> >> >> >> twitter.com/davidmacd <http://twitter.com/davidmacd> <http://twitter.com/davidmacd <http://twitter.com/davidmacd>> >> >> GitHub <https://github.com/DavidMacDonald <https://github.com/DavidMacDonald>> >> >> www.Can-Adapt.com <http://www.can-adapt.com/> <http://www.can-adapt.com/ <http://www.can-adapt.com/>> >> >> >> >> Adapting the web to all users >> >> >> Including those with disabilities >> >> >> >> >> >> If you are not the intended recipient, please review our privacy policy <http://www.davidmacd.com/disclaimer.html <http://www.davidmacd.com/disclaimer.html>> >> >> >> >> >> >> On Mon, Feb 6, 2017 at 11:50 PM, Glenda Sims <glenda.sims@deque.com <mailto:glenda.sims@deque.com> <mailto:glenda.sims@deque.com <mailto:glenda.sims@deque.com>> > wrote: >> >> >> Hey David, >> >> >> >> >> >> Looking at the glossary term for "image of text" leads me to believe that I'd need to watch the video to know for sure. If the text on the blackboard is significant and there is not audio reference to it....then, I think I would fail it under 1.2.5 Audio Description (Prerecorded) >> >>> >>> image of text >>> >>> >>> text that has been rendered in a non-text form (e.g., an image) in order to achieve a particular visual effect >>> >>> >>> Note: This does not include text <http://www.w3.org/TR/2008/REC-WCAG20-20081211/#textdef <http://www.w3.org/TR/2008/REC-WCAG20-20081211/#textdef>> that is part of a picture that contains significant other visual content. >>> >>> >>> Example: A person's name on a nametag in a photograph. >>> >> >> Cheers, >> >> >> G >> >> >> glenda sims | team a11y lead | deque.com <http://deque.com/> <http://deque.com <http://deque.com/>> | 512.963.3773 <tel:(512)%20963-3773> >> >> web for everyone. web on everything. - w3 goals >> >> >> >> >> >> On Mon, Feb 6, 2017 at 10:24 PM, Aparna Pasi <aparna.pasi@deque.com <mailto:aparna.pasi@deque.com> <mailto:aparna.pasi@deque.com <mailto:aparna.pasi@deque.com>> > wrote: >> >> >> Hey David, >> >> >> To be honest, I haven't failed video animation or captions as I haven't seen such a scenario. >> >> >> I believe we should fail them as they are conveying information however, success criteria doesn't include anything about timed media. >> >> >> Thanks, >> >> >> Aparna >> >> >> >> >> >> On Tue, Feb 7, 2017 at 4:30 AM, David MacDonald <david100@sympatico.ca <mailto:david100@sympatico.ca> <mailto:david100@sympatico.ca <mailto:david100@sympatico.ca>> > wrote: >> >> >> For instance a video an animation of someone in front of a blackboard with text on it. >> >> >> >> >> >> The definition appears to limit the SC to static images... >> >> >> >> >> >> Thoughts? >> >> >> Cheers, >> David MacDonald >> >> >> >> CanAdapt Solutions Inc. >> >> Tel: 613.235.4902 <tel:(613)%20235-4902> >> >> LinkedIn <http://www.linkedin.com/in/davidmacdonald100 <http://www.linkedin.com/in/davidmacdonald100>> >> >> >> twitter.com/davidmacd <http://twitter.com/davidmacd> <http://twitter.com/davidmacd <http://twitter.com/davidmacd>> >> >> GitHub <https://github.com/DavidMacDonald <https://github.com/DavidMacDonald>> >> >> www.Can-Adapt.com <http://www.can-adapt.com/> <http://www.can-adapt.com/ <http://www.can-adapt.com/>> >> >> >> >> Adapting the web to all users >> >> >> Including those with disabilities >> >> >> >> >> >> If you are not the intended recipient, please review our privacy policy <http://www.davidmacd.com/disclaimer.html <http://www.davidmacd.com/disclaimer.html>> >> >> >> >> >> >> -- >> >> >> Satya Jaya Aparna Pasi >> >> >> CPACC Professional| Senior Accessibility Consultant >> >> >> Deque Software >> >> >> aparna.pasi@deque.com <mailto:aparna.pasi@deque.com> <mailto:aparna.pasi@deque.com <mailto:aparna.pasi@deque.com>> | +91-7093400949 <tel:+91%2070934%2000949 <tel:+91%2070934%2000949>>
Received on Wednesday, 8 February 2017 18:38:58 UTC