Re: Color correction in video, check

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/