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The Official ChromaPure thread - Page 148

post #4411 of 5355
Is there a bug with color checker I missed? I went to use it today for the first time and it would crash chromapure every time I clicked on any square to take a measurement. I was using my Oppo and GCD as the generator.
post #4412 of 5355
Quote:
Originally Posted by gadgtfreek View Post

Is there a bug with color checker I missed? I went to use it today for the first time and it would crash chromapure every time I clicked on any square to take a measurement. I was using my Oppo and GCD as the generator.
This is a bug I have just logged and will be fixed shortly. If signal generator support is not selected--as would be the case when an external disc was being used for test patterns--then CP throws an exception.

Temporary workaround: enable signal generator support for the internal test patterns, but continue to use the disc.
post #4413 of 5355
Cool. I was feeling like a dumbarse.
post #4414 of 5355
I do Autocal with a Lumagen XS. I recently posted the best of several attempts here. That run was started when the Lumagen was selecting input 1 whose source was off and a output setting of CMS(0). Other inputs were assigned a mix of CMS(0) and CMS(1).

Subsequently, being curious I tried some alternative projector settings with the Lumagen selecting input 1 which was off but with a output setting of CMS(1). The last of these was excessive on red in the readings but not when I watched two TV programs on input 4, CMS(1).

I decided the posted run gave the best results and changed all inputs to CMS(0). I then watched three programs and found red to be excessive.

What did I do wrong? Does Chromapure always adjust CMS(0)? Am I hallucinating?
post #4415 of 5355
Chromapure adjusts whichever CMS is active at the time you perform the calibration -- if you want to adjust CMS1 (for example) then make sure it's selected before using Chromapure. If you're using multiple CMS's you can copy the data from one to another using the copy command in the Lumagen output menu.
post #4416 of 5355
If I want to use CIELUV for grayscale and then CIE94 for color...how do I do that? I see in the options that I can chose one or the other. Do I simply compete the grayscale section with CIELUV selected in the options, then change it to CIE94 in the options before doing color?
post #4417 of 5355
Quote:
Originally Posted by HD-Master View Post

If I want to use CIELUV for grayscale and then CIE94 for color...how do I do that? I see in the options that I can chose one or the other. Do I simply compete the grayscale section with CIELUV selected in the options, then change it to CIE94 in the options before doing color?
Currently, that's correct. The ability to use different dE formulas for grayscale and color--without switching in Options--is on our development roadmap.
post #4418 of 5355
Quote:
Originally Posted by TomHuffman View Post

Quote:
Originally Posted by HD-Master View Post

If I want to use CIELUV for grayscale and then CIE94 for color...how do I do that? I see in the options that I can chose one or the other. Do I simply compete the grayscale section with CIELUV selected in the options, then change it to CIE94 in the options before doing color?
Currently, that's correct. The ability to use different dE formulas for grayscale and color--without switching in Options--is on our development roadmap.

Thank you Tom.
Edited by HD-Master - 6/21/13 at 1:13pm
post #4419 of 5355
I am looking for a bit of guidance. I used Chromapure for the first time last night. It was a massive struggle. That was...until I figured out why. I was using 5% APL patterns from the Mascior disc for the first time and once I would get my grayscale somewhat dialed in I would experience severe noise on dimmer material. I can't even describe just how bad it was. My CUTS and DRVS values were extreme. Anyway, things got much easier once I switched to small non-APL windows. The only issue I have now may seem silly.

When measuring my GT50 with a D3, the lowest Y value on a 0 IRE window that I have been able to achieve is 0.003. With my final calibration run last night I could not get it below 0.004. Lowering the brightness control had no effect and of course caused that setting to be inaccurate anyway. Should I be satisfied with 0.004 or is there something I should try that will allow me to move that number?

post #4420 of 5355
What mode and panel brightness ate you using? Color temp and gamma setting? I've been fighting my vt50 for a month trying to find the best method and I think I've won finally.
post #4421 of 5355
Quote:
Originally Posted by gadgtfreek View Post

What mode and panel brightness ate you using? Color temp and gamma setting? I've been fighting my vt50 for a month trying to find the best method and I think I've won finally.

I'm open to trying anything!

Custom picture mode
Warm 2
Gamma setting of 2.4
Panel brightness at Mid
post #4422 of 5355
Quote:
Originally Posted by HD-Master View Post


I'm open to trying anything!

Custom picture mode
Warm 2
Gamma setting of 2.4
Panel brightness at Mid

Hi HD-Master,

 

One thing that you have to put into consideration is the D3's amount of decimal data output. In your case you have seen your GT50 reach an mll of .003 with your D3...but a Klein K-10 may read .0039. After your last calibration of reaching an mll of .004 may actually be .0040 and be really close to your last lowest mll reading achieved.smile.gif FWIW...I bounce between my 4% standard/4%APL patterns from my disc and achieve phenomenal results on my VT50!

 

Ryan

post #4423 of 5355
All that looks good. I've tried masciors 6.5 and gcd 10% windows. Normal color temp works better for me, warm 2 always leave me with a reddish tone especially low.

I ended up using Apl for the first time with the spears and Munsil equal energy windows. I calibrated in normal color temp with high 2pt adjusting 80 stimuli and used 2pt low to adjust to 10% instead of 20 or 30. This seemed to work out a green spine I had low in normal color temp, warm 2 had the red issue and I was not successful working it out to my liking.

I then did 10pt gray scale and gamma with the equal energy patterns and gamut with their 75% intensity patterns. I got 34.5 fl with a contrast of 85.

I've watched about 10 hours on it now and I think its the best the vt50 has looked for me (only been using for a couple of months).

I'm using a D3 pro from tom and the OPPO.

I find my mll to be 0.0023 all the time unless I switch to low panel brightness then it increases to 0.006fl. My contrast usually starts between 80 and 85, brightness will initially set around 58, but one I tinker with 10pt it'll end up around 56 or 57. On mine Normal color temp also requires a different brightness setting be Warm2, and I personally prefer the results when starting in Normal mode.
post #4424 of 5355
A better way to get an exact mll number is to set ChromaPure to cdm2 in stead of fL and then use an online calculator. For example I get 0.002fL with it normally, but if I read cdm2 and convert I get 0.0023.
post #4425 of 5355
Quote:
Originally Posted by gadgtfreek View Post

A better way to get an exact mll number is to set ChromaPure to cdm2 in stead of fL and then use an online calculator. For example I get 0.002fL with it normally, but if I read cdm2 and convert I get 0.0023.

Quote:
Originally Posted by mascior View Post

Quote:
Originally Posted by HD-Master View Post

I'm open to trying anything!


Custom picture mode

Warm 2

Gamma setting of 2.4

Panel brightness at Mid
Hi HD-Master,

One thing that you have to put into consideration is the D3's amount of decimal data output. In your case you have seen your GT50 reach an mll of .003 with your D3...but a Klein K-10 may read .0039. After your last calibration of reaching an mll of .004 may actually be .0040 and be really close to your last lowest mll reading achieved.smile.gif
 FWIW...I bounce between my 4% standard/4%APL patterns from my disc and achieve phenomenal results on my VT50!

Ryan

Quote:
Originally Posted by gadgtfreek View Post

All that looks good. I've tried masciors 6.5 and gcd 10% windows. Normal color temp works better for me, warm 2 always leave me with a reddish tone especially low.

I ended up using Apl for the first time with the spears and Munsil equal energy windows. I calibrated in normal color temp with high 2pt adjusting 80 stimuli and used 2pt low to adjust to 10% instead of 20 or 30. This seemed to work out a green spine I had low in normal color temp, warm 2 had the red issue and I was not successful working it out to my liking.

I then did 10pt gray scale and gamma with the equal energy patterns and gamut with their 75% intensity patterns. I got 34.5 fl with a contrast of 85.

I've watched about 10 hours on it now and I think its the best the vt50 has looked for me (only been using for a couple of months).

I'm using a D3 pro from tom and the OPPO.

I find my mll to be 0.0023 all the time unless I switch to low panel brightness then it increases to 0.006fl. My contrast usually starts between 80 and 85, brightness will initially set around 58, but one I tinker with 10pt it'll end up around 56 or 57. On mine Normal color temp also requires a different brightness setting be Warm2, and I personally prefer the results when starting in Normal mode.

Thank you very much folks. All very good info.
post #4426 of 5355
Quote:
Originally Posted by HD-Master View Post

When measuring my GT50 with a D3, the lowest Y value on a 0 IRE window that I have been able to achieve is 0.003. With my final calibration run last night I could not get it below 0.004. Lowering the brightness control had no effect and of course caused that setting to be inaccurate anyway. Should I be satisfied with 0.004 or is there something I should try that will allow me to move that number?

You may find (especially towards the end of a long calibration session) that you are measuring IR. Move the meter off center and measure an area of the display that hasn't been displaying the windows to confirm.
post #4427 of 5355
Ive not had that issue on the VT50, but it was a problem on the GT30. What I found to work on the GT was starting with a full field, about 40%, leaving it up for a few minutes, going to 30, and so on down until it hit 0%, and then take the reading. This would give me the lowest reading I could find anywhere else on the screen. On the VT50 I can take a shot after calibration and its the same with no pattern IR.
post #4428 of 5355
When using the Lumagen Radiance as a signal generator and during Auto Calibration, is the correct RS-232 setup setting in the Lumagen Echo "On" or "Off"? Thanks!
post #4429 of 5355
Quote:
Originally Posted by tripletlex View Post

When using the Lumagen Radiance as a signal generator and during Auto Calibration, is the correct RS-232 setup setting in the Lumagen Echo "On" or "Off"? Thanks!
It doesn't matter. CP sets it correctly at the beginning of the auto-cal process.
post #4430 of 5355
When creating a meter correction, should one use 75% color windows or 100% windows (from the ChromaPure section of the AVS HD 709 disc)? Does it matter?
post #4431 of 5355
Quote:
Originally Posted by HD-Master View Post

When creating a meter correction, should one use 75% color windows or 100% windows (from the ChromaPure section of the AVS HD 709 disc)? Does it matter?
Someone correct me if I'm wrong, but as long as you use the same windows for both meters, it shouldn't matter
post #4432 of 5355
Quote:
Originally Posted by adrian s View Post

Quote:
Originally Posted by HD-Master View Post

When creating a meter correction, should one use 75% color windows or 100% windows (from the ChromaPure section of the AVS HD 709 disc)? Does it matter?
Someone correct me if I'm wrong, but as long as you use the same windows for both meters, it shouldn't matter

Thanks. I wonder what Tom uses for the D3 Pro's.
post #4433 of 5355
Quote:
Originally Posted by adrian s View Post

Quote:
Originally Posted by HD-Master View Post

When creating a meter correction, should one use 75% color windows or 100% windows (from the ChromaPure section of the AVS HD 709 disc)? Does it matter?
Someone correct me if I'm wrong, but as long as you use the same windows for both meters, it shouldn't matter

It doesn't matter if you have a JETI / Photo Reaseach / Minolta.

If you have i1PRO 1/2 these meters are returning chromaticity but they are not so accurate reading low luminance levels,
for example Blue Pattern during the profiling @ Luminance Levels Below ~8 cd/m2.

Examples:

If you have a Display with White @ 120cd/m2 with Gamma 2.2:

If you perform profiling with 100% Amplitude Patterns then you will have:

100% White @ 120 cd/m2
100% Blue @ 8,6 cd/m2

If you perform profiling with 75% Amplitude Patterns then you will have:

75% White @ 63,5 cd/m2
75% Blue @ 4,5 cd/m2

If you have a Projector with White @ 14fl = 48cd/m2 with Gamma 2.2:

If you perform profiling with 100% Amplitude Patterns then you will have:

100% White @ 48 cd/m2
100% Blue @ 3,4 cd/m2
100% Red @ 10,2 cd/m2

If you perform profiling with 75% Amplitude Patterns then you will have:

75% White @ 25,4 cd/m2
75% Blue @ 1,8 cd/m2
75% Red @ 5,4 cd/m2
post #4434 of 5355
Well, here is what I ended up with last night. I ran out of time to work with it more. It needs some work. I'd like to balance out the gamma, but I haven't sorted out how to accomplish that just yet.

post #4435 of 5355
Quote:
Originally Posted by HD-Master View Post

Well, here is what I ended up with last night. I ran out of time to work with it more. It needs some work. I'd like to balance out the gamma, but I haven't sorted out how to accomplish that just yet.

With 2p GS only are you targeting 2.2 gamma? Try doing the cuts at 20% in the gamma module.
post #4436 of 5355
Quote:
Originally Posted by HD-Master View Post

Thanks. I wonder what Tom uses for the D3 Pro's.
JETI 1201
post #4437 of 5355
Quote:
Originally Posted by buzzard767 View Post

Quote:
Originally Posted by HD-Master View Post

Well, here is what I ended up with last night. I ran out of time to work with it more. It needs some work. I'd like to balance out the gamma, but I haven't sorted out how to accomplish that just yet.

With 2p GS only are you targeting 2.2 gamma? Try doing the cuts at 20% in the gamma module.

Yes, well 2.4 in the GT50 menu. Thanks for the tip.
post #4438 of 5355
Quote:
Originally Posted by HD-Master View Post

Well, here is what I ended up with last night. I ran out of time to work with it more. It needs some work. I'd like to balance out the gamma, but I haven't sorted out how to accomplish that just yet.


I don't recall if the GT50 has 10pt grayscale but, if not, you might want to try one of two things to balance out your low end and get rid of that red bias. Try starting with "Normal" color temp instead. Or use 10% as your low end adjustment. If you have to compromise, I personally much prefer a blue bias on the low end and will do whatever I can to swing it that way.
post #4439 of 5355
On my vt50 I ended up using normal, calibrating to 80% and 10% in 2pt, then adjusted the rest with 10pt. I'd much take blue over red as well.
post #4440 of 5355
Quote:
Originally Posted by stash64 View Post

Quote:
Originally Posted by HD-Master View Post

Well, here is what I ended up with last night. I ran out of time to work with it more. It needs some work. I'd like to balance out the gamma, but I haven't sorted out how to accomplish that just yet.


I don't recall if the GT50 has 10pt grayscale but, if not, you might want to try one of two things to balance out your low end and get rid of that red bias. Try starting with "Normal" color temp instead. Or use 10% as your low end adjustment. If you have to compromise, I personally much prefer a blue bias on the low end and will do whatever I can to swing it that way.

Thanks. I plan on trying "normal" tonight.
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