Re: The color of QuickTime 5 (Gary Adcock's response to Don's
Re: The color of QuickTime 5 (Gary Adcock's response to Don's
- Subject: Re: The color of QuickTime 5 (Gary Adcock's response to Don's
- From: Dan Reid <email@hidden>
- Date: Mon, 08 Oct 2001 10:20:54 -0600
On Fri, 05 Oct 2001 15:23:39 -0400, Don Hutcheson <email@hidden>
wrote:
>
snip>
>
>
What I'd like to know is this. What real-world video problems would dynamic
>
3-D ICC-based color management solve that couldn't be 90% fixed on a monitor
>
with NTSC-ish RGB coordinates by simple display adjustments like white
>
point, gamma and gray tracking?
Unfortunately, there isn't a TV around that conforms to a NTSC color gamut.
NTSC was developed way back in the dark ages of 50's. The Society of Motion
Picture/Television Experts (SMPTE) recommended video manufacturers adopt a
more realistic SMPTE-C phosphor standards since much of the huge excursion
in the green region was unrealized in average viewing conditions. Most
people prefer a brighter screen over saturated (darker) colors.
So while there isn't a method I know to calibrate a TV with a color
measurement device you can use waveform/vectorscopes to analyze a video
signal and adjust to meet standard SMPTE color bars. If you don't have
scopes than grab a pair of blue sun glasses and view SMPTE color bars.
Professional monitor allow blue-gun only visual calibration of
brightness/contrast, tint, and color if you know how the target works. Blue
sun glasses also do the trick for non-professional video sets.
Interesting note folks, are ye'ol favorite sRGB, uses the same phosphor
coordinates, gamma, and white point as HDTV. Hmmm
--
Dan B. Reid
RENAISSANCE PHOTOGRAPHIC IMAGING
Color Imaging Solutions Provider
http://www.rpimaging.com | email@hidden
Toll Free: (866) RGB-CMYK [ 866-742-2695 ]
Local: (505) 471-4126