Did grayscale with 94, worth 2nd pass with uv? - AVS Forum | Home Theater Discussions And Reviews
Baselworld is only a few weeks away. Getting the latest news is easy, Click Here for info on how to join the Watchuseek.com newsletter list. Follow our team for updates featuring event coverage, new product unveilings, watch industry news & more!


Forum Jump: 
 
Thread Tools
post #1 of 6 Old 06-09-2012, 07:51 AM - Thread Starter
Member
 
duke32's Avatar
 
Join Date: Oct 2006
Posts: 82
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 13
Got my D3 PRO the other day (thanks Tom!) and redid my grayscale from my old D2. It's amazing how far off the D2 was. I used CIE94 and was able to get <1 dE from 20-100. Would I benefit anything with a 2nd pass using uv, or should I just stop?
duke32 is offline  
Sponsored Links
Advertisement
 
post #2 of 6 Old 06-09-2012, 09:05 AM
AVS Special Member
 
sotti's Avatar
 
Join Date: Aug 2004
Location: Seattle, WA
Posts: 6,755
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 123 Post(s)
Liked: 214
Quote:
Originally Posted by duke32 View Post

Got my D3 PRO the other day (thanks Tom!) and redid my grayscale from my old D2. It's amazing how far off the D2 was. I used CIE94 and was able to get <1 dE from 20-100. Would I benefit anything with a 2nd pass using uv, or should I just stop?

That should be plenty close.

Joel Barsotti
SpectraCal
CalMAN Lead Developer
sotti is offline  
post #3 of 6 Old 06-09-2012, 01:00 PM
AVS Special Member
 
PlasmaPZ80U's Avatar
 
Join Date: Feb 2009
Posts: 8,042
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 481 Post(s)
Liked: 263
Quote:
Originally Posted by duke32 View Post

Got my D3 PRO the other day (thanks Tom!) and redid my grayscale from my old D2. It's amazing how far off the D2 was. I used CIE94 and was able to get <1 dE from 20-100. Would I benefit anything with a 2nd pass using uv, or should I just stop?

do you mean LUV or UV? I think ChromaPure only does LUV.

UN46EH6030 Calibration/Settings
Display: Samsung UN46EH6030 LED-LCD TV; Audio: Yamaha HTR-3066 AVR/AMP, Sony Core Bookshelves (Sony SS-CS5) and Center (Sony SS-CS8) as fronts, Cambridge Audio S20 Bookshelves (CA S20-N) as surrounds, Dayton Audio SUB-1200 as subwoofer; Sources: PS4 (doubles as primary BD player), Xbox One, PS3, Xbox 360, Motorola RNG150N (Cable Box)
PlasmaPZ80U is offline  
post #4 of 6 Old 06-09-2012, 08:06 PM - Thread Starter
Member
 
duke32's Avatar
 
Join Date: Oct 2006
Posts: 82
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 13
Quote:
Originally Posted by PlasmaPZ80U View Post

do you mean LUV or UV? I think ChromaPure only does LUV.

Right, LUV. I just figured out that Chromapure lets you can change your dE method on the fly, so I reloaded my session from last night and changed the dE to LUV and it converted everything from 94 to LUV.....sweet!
duke32 is offline  
post #5 of 6 Old 06-12-2012, 12:26 AM
AVS Special Member
 
TomHuffman's Avatar
 
Join Date: Jan 2003
Location: Springfield, MO
Posts: 6,811
Mentioned: 11 Post(s)
Tagged: 0 Thread(s)
Quoted: 303 Post(s)
Liked: 392
Quote:
Originally Posted by PlasmaPZ80U View Post

do you mean LUV or UV? I think ChromaPure only does LUV.
This is just a matter of terminology. We allow selection of any one of 4 dE methods: CIELAB, CIELUV, CIE94, or CIEDE2000. CIE94 is the default. However, we don't consider luminance is grayscale measurements. We handle this with gamma. This issue has been discussed on this forum previously. We use the luminance element in dE calculations only for color. So, technically speaking we use uv for grayscale and Luv for color.

Tom Huffman
ChromaPure Software/AccuPel Video Signal Generators
ISF/THX Calibrations
Springfield, MO

TomHuffman is offline  
post #6 of 6 Old 06-12-2012, 12:29 AM
AVS Special Member
 
TomHuffman's Avatar
 
Join Date: Jan 2003
Location: Springfield, MO
Posts: 6,811
Mentioned: 11 Post(s)
Tagged: 0 Thread(s)
Quoted: 303 Post(s)
Liked: 392
Quote:
Originally Posted by duke32 View Post

Got my D3 PRO the other day (thanks Tom!) and redid my grayscale from my old D2. It's amazing how far off the D2 was. I used CIE94 and was able to get <1 dE from 20-100. Would I benefit anything with a 2nd pass using uv, or should I just stop?
Anything under 2 is pretty much perfect. THX sets 3 or below as a threshold and SMPTE specifies 4 or below. You are good to go.

Tom Huffman
ChromaPure Software/AccuPel Video Signal Generators
ISF/THX Calibrations
Springfield, MO

TomHuffman is offline  
Sponsored Links
Advertisement
 
Reply Display Calibration

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page


Forum Jump: 

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off