[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
RE: YUV/RGB Color Space Issues
- To: 'Stephane Blondin' <Stephane_Blondin at Discreet.COM>, multiple recipients of <telecine at alegria.com>
- Subject: RE: YUV/RGB Color Space Issues
- From: Pete Mountanos <petemo at microsoft.com>
- Date: Thu, 18 Dec 1997 15:40:58 -0800
- Resent-Date: Thu, 18 Dec 1997 15:42:03 -0800
- Resent-From: telecine at alegria.com
- Resent-Message-ID: <"Rznq_D.A.04.gSbm0" at sun>
- Resent-Sender: telecine-request at alegria.com
- Resent-To: multiple recipients of <telecine at alegria.com>
From: Stephane Blondin [SMTP:Stephane_Blondin at Discreet.COM]
Sent: Thursday, December 18, 1997 2:18 PM
To: multiple recipients of
Subject: RE: YUV/RGB Color Space Issues
You are right. The RGB color space has a larger gammut than the YUV
BUT, because the end-of -the-line display devices, CRTs are RGB
> yes but the CRT displays these colors nonlinearly and you process
them in RGB space linearly. I believe the SGI luma transfer functions are
different than normal video transfer functions.
this greatly influences how we define a signal as being legal or not
know it's not the only factor..). So it is safe to assume that an
where the RGB color space is fit within the YUV space is safe and
cover the vast majority of the colors which we can safely assume
display accurately on the end projection devices.
In this case is this space still shaped like a cube?
AS a side note, how will you handle the fact that the luma equations
as defined in Rec. 709 (HDTV) are different than those defined in 601 or
240M? I realize we probably can't see these differences, but which will you
Thanks for the education.
thanks to Neil Kempt for support of the TIG in 1998
TIG subscriber count is 910 on Thu Dec 18 15:41:15 PST 1997
complete information on the TIG website http://www.alegria.com/tig3/