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Thread: Help with measuring colour contrast on video
Number of posts in this thread: 3 (In chronological order)
From: Claire Brotherton
Date: Tue, Jan 21 2020 9:40AM
Subject: Help with measuring colour contrast on video
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Has anyone got advice or experience of measuring the contrast between text
superimposed a video background?
I would imagine that you have to take stills of the video, sample pixels of
the text and background, and test the colour values. But there could be
thousands of frames in, say, a 1 minute video.
Has anyone got practical tips?
Kind regards
Claire
--
Claire Brotherton
A Bright Clear Web <https://www.abrightclearweb.com>
WordPress website design, development, maintenance and training
Web: https://www.abrightclearweb.com
Email: = EMAIL ADDRESS REMOVED =
Facebook: https://www.facebook.com/abrightclearweb
Twitter: @abrightclearweb <https://twitter.com/abrightclearweb>
LinkedIn: https://www.linkedin.com/in/clairebrotherton
Skype: abrightclearweb
From: Robert Hardy
Date: Tue, Jan 21 2020 11:23AM
Subject: Re: Help with measuring colour contrast on video
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I don't have any immediate recommendations for testing tools, but would
recommend using an outline around the text. A stroke that contrasts
sufficiently with the text itself should enhance contrast on a variety of
backgrounds. Alternatively, you could have a background behind the text, as
YouTube does.
Best,
Robert
On Tue, Jan 21, 2020 at 8:41 AM Claire Brotherton <
= EMAIL ADDRESS REMOVED = > wrote:
> Has anyone got advice or experience of measuring the contrast between text
> superimposed a video background?
>
> I would imagine that you have to take stills of the video, sample pixels of
> the text and background, and test the colour values. But there could be
> thousands of frames in, say, a 1 minute video.
>
> Has anyone got practical tips?
>
> Kind regards
>
> Claire
>
> --
> Claire Brotherton
> A Bright Clear Web <https://www.abrightclearweb.com>
>
> WordPress website design, development, maintenance and training
>
> Web: https://www.abrightclearweb.com
> Email: = EMAIL ADDRESS REMOVED =
> Facebook: https://www.facebook.com/abrightclearweb
> Twitter: @abrightclearweb <https://twitter.com/abrightclearweb>
> LinkedIn: https://www.linkedin.com/in/clairebrotherton
> Skype: abrightclearweb
> > > > >
--
*Robert Hardy*
*Website Accessibility Specialist*
*Olympia School District*
*(360) 596-6105*
From: Murphy, Sean
Date: Tue, Jan 21 2020 5:26PM
Subject: Re: Help with measuring colour contrast on video
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I thought video was exempted from 1.4.3 and 1.4.10 (High Contrast Non-text). Is this correct?
Sean
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Sent: Wednesday, 22 January 2020 5:24 AM
To: WebAIM Discussion List < = EMAIL ADDRESS REMOVED = >
Subject: Re: [WebAIM] Help with measuring colour contrast on video
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I don't have any immediate recommendations for testing tools, but would recommend using an outline around the text. A stroke that contrasts sufficiently with the text itself should enhance contrast on a variety of backgrounds. Alternatively, you could have a background behind the text, as YouTube does.
Best,
Robert
On Tue, Jan 21, 2020 at 8:41 AM Claire Brotherton < = EMAIL ADDRESS REMOVED = > wrote:
> Has anyone got advice or experience of measuring the contrast between
> text superimposed a video background?
>
> I would imagine that you have to take stills of the video, sample
> pixels of the text and background, and test the colour values. But
> there could be thousands of frames in, say, a 1 minute video.
>
> Has anyone got practical tips?
>
> Kind regards
>
> Claire
>
> --
> Claire Brotherton
> A Bright Clear Web <https://www.abrightclearweb.com>
>
> WordPress website design, development, maintenance and training
>
> Web: https://www.abrightclearweb.com
> Email: = EMAIL ADDRESS REMOVED =
> Facebook: https://www.facebook.com/abrightclearweb
> Twitter: @abrightclearweb <https://twitter.com/abrightclearweb>
> LinkedIn: https://www.linkedin.com/in/clairebrotherton
> Skype: abrightclearweb
> > > archives at http://webaim.org/discussion/archives
> >
--
*Robert Hardy*
*Website Accessibility Specialist*
*Olympia School District*
*(360) 596-6105*