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Re: Color correction in video, check

From: David Singer <singer@apple.com>
Date: Wed, 4 Nov 2009 10:56:41 -0800
Cc: HTML WG <public-html@w3.org>, Daniel Glazman <daniel.glazman@disruptive-innovations.com>
Message-Id: <F186E9B1-332F-496B-BF36-B002124E0B54@apple.com>
To: Henri Sivonen <hsivonen@iki.fi>
It is precisely this mis-match (well, and the incorrect appearance of  
uncorrected material) we hope to avoid.

plugins are an issue, agreed.

On Nov 4, 2009, at 0:11 , Henri Sivonen wrote:

> On Nov 3, 2009, at 22:08, Dave Singer wrote:
>
>> In a CSS working group discussion today, we discussed color  
>> correction as it applies to colors in CSS and untagged images.  The  
>> question came up as to how untagged video should be treated.  We'd  
>> like to say that it is treated as being sRGB (consistently), as  
>> this generally matches 709 colors.  The question is, is this OK?
>
> As an author, I'd expect unlabeled images, unlabeled videos and  
> unlabeled NPAPI-plug-in graphics surfaces to be in the same color  
> space as unlabeled CSS colors.
>
> That is, if unlabeled CSS colors are implemented as sRGB, unlabeled  
> video should be sRGB, too, but if unlabeled CSS colors are  
> implemented as platform colors, it's not OK to go ahead and put only  
> videos in sRGB.
>
> Previously, implementing color "correction" for bitmaps and CSS out  
> of sync has lead to a lot of grief for authors. Remember pre-Tiger  
> Safari:
> http://hsivonen.iki.fi/png-gamma/
>
> -- 
> Henri Sivonen
> hsivonen@iki.fi
> http://hsivonen.iki.fi/
>
>

David Singer
Multimedia and Software Standard, Apple Inc.
Received on Wednesday, 4 November 2009 18:57:23 UTC

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