Re: The color of QuickTime 5 ( don's comments)
Re: The color of QuickTime 5 ( don's comments)
- Subject: Re: The color of QuickTime 5 ( don's comments)
- From: gary adcock <email@hidden>
- Date: Fri, 5 Oct 2001 10:50:34 -0500
At playtime, QT would extract the gamma and white point from a profile
(attached to the clip or specified independently as a QT default) and use
those data to build the LUTs. Any 3-D LUT and/or matrix in the profile would
probably have to be skipped due to the huge processing burden, meaning
color-dependent functions like saturation and hue correction would not be
applied. But gamma and white point are usually the most significant part of
any profile and for video I'd say honoring the intended Gamma would be a
great first step towards QT color management.
Ok Don
as a newbie on this list, but "nominally" versed in color --under the
video standard this is a great idea on a computer but how is this
going to be implemented on NTSC displays or worse yet on standard
tv's ?
While the ref monitors used in TV studios may be able to
handle the modified color/gamma data via play back via an RT video
card with component out (digital voodoo/media100/ cinewave )
How is it going to work from an avid (as proprietary as avid
is but still regarded as the defining video standard just as
photoshop is for print ) wintel systems or on the millions of HD sets
yet to be delivered and the myriad of types connectors that will be
used.
How is is this info transferred via a composite video (single
cable ie. rca or bnc) signal instead a of component ( YUV )or optical
connector being used between other motion video devices.
How is the gamma and white point going to be handled on sets
with dynamic contrast (gamma) adjustment based on ambient room light
as this is standard on all high end NTSC sets shipping today, and I
have not even added PAL with it's larger base color space and wider
dynamic range that's used in the rest of the world.
ga
--
gary adcock
studio37
chicago,il 60612
312-243-3244
email@hidden