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The Official ChromaPure thread - Page 163

post #4861 of 5348
Thanks Tom; I don't think it's a bug in the software, just the meter struggling to measure black level.

I haven't played with using a field meter for a while, but just wondered which option I need to select when I set up the meter as I currently use the 'projector from screen' option. Will it even allow me to chose a different setting for the field meter, if not I suppose it doesn't really matter if I'm creating an offset from the screen reading anyway?
post #4862 of 5348
Quote:
Originally Posted by Kelvin1965S View Post

Thanks Tom; I don't think it's a bug in the software, just the meter struggling to measure black level.

I haven't played with using a field meter for a while, but just wondered which option I need to select when I set up the meter as I currently use the 'projector from screen' option. Will it even allow me to chose a different setting for the field meter, if not I suppose it doesn't really matter if I'm creating an offset from the screen reading anyway?
Hello,Kelvin
How far you will set the X-rite from the projector lens when you take the reading from your JVC lens?
Did you performed all the calibration session like this?reading from the lens?
My screen is Da-lite JKP Affinity 1.1,i think on of the best screen available right now - very neutral....do you think is better to read from my JVC lens for better (easier) readings from my X-Rite Display 3 Pro?

Also Tom advise, if is possible?

Thanks
Edited by maximus74 - 12/8/13 at 2:34pm
post #4863 of 5348
The other night I just turned the sensor round, so those measurement were done with it near to the screen (approx 18' from the projector). This seemed to work well and give a decent light level into the sensor compared to reading off the screen. In the past I've had the sensor much closer to the projector, perhaps only 7' away, but it was just a quick experiment to check the on/off contrast reading initially.

I just went on to check how close the white balance reading was at 100% to compare the two options (without creating an offset at this time). It turned out to be very close, hence why I went on to make small adjustments at the 5,10 & 15% levels as I wasn't entirely happy with them previously. The difference at 100% was only about 1dE, but at 5% the difference was 5-6dE and tinted red (confirmed by the off projector measurement which measured red as being high). I adjusted the 5% to <1dE measured from the projector and it lost the red tint it had previously when it was adjusted by measuring off the screen.

I haven't done the whole calibration like this, but plan to try, which is why I was asking about how best to set up the field/reference meter settings.

My feeling is that it's better to read from the projector (at least for the very low readings) due to the very low light levels involved. However it is important to ensure that you create an offset from the screen measurement to allow for any effect the screen has.

Hopefully Tom will answer more definitively.
Edited by Kelvin1965S - 12/9/13 at 12:47am
post #4864 of 5348
If you want to take the screen effect into account, then take reference readings at sufficient light levels off the screen with the meter initialized in the off the screen mode.

Disconnect the meter and then reconnect using the from lens mode. Take your field readings. Apply the correction, and then leave in lens mode for the remainder of the calibration.

I think that calibrating from the lens using the D3+diffuser is a perfectly viable approach. If you have a color neutral screen, you don't even have to correct the meter.
post #4865 of 5348
Quote:
Originally Posted by TomHuffman View Post

If you want to take the screen effect into account, then take reference readings at sufficient light levels off the screen with the meter initialized in the off the screen mode.

Disconnect the meter and then reconnect using the from lens mode. Take your field readings. Apply the correction, and then leave in lens mode for the remainder of the calibration.

I think that calibrating from the lens using the D3+diffuser is a perfectly viable approach. If you have a color neutral screen, you don't even have to correct the meter.

Tom

Can you explain in more step by step detail how to do this? What initial reference readings am I taking, and where do I apply the corrections?

Or is there a doc on this?

Thanks
post #4866 of 5348
I have a question about the 5 point calibration method. If I calibrate 10 point greyscale with my lumagen mini, but using a disc for the patterns and using apl patterns, and after I am done doing that I select ONLY the auto 125 color calibration using the medium windows of the lumagen itself, will that work? Or will it give off results? Will the luminance of the colours be in reference to the greyscale I did manually, or will the greyscale be altered and the colours be wrong after the auto cal?
post #4867 of 5348
Quote:
Originally Posted by thrang View Post

Tom

Can you explain in more step by step detail how to do this? What initial reference readings am I taking, and where do I apply the corrections?

Or is there a doc on this?

Thanks
Use the Meter Correction module for this. It is explained in the Help file and manual. It is very simple. You take readings from a reference meter that correct readings from the field meter. In this case, the meters are the same, just initialized in different modes.
post #4868 of 5348
Quote:
Originally Posted by Wouter73 View Post

I have a question about the 5 point calibration method. If I calibrate 10 point greyscale with my lumagen mini, but using a disc for the patterns and using apl patterns, and after I am done doing that I select ONLY the auto 125 color calibration using the medium windows of the lumagen itself, will that work? Or will it give off results? Will the luminance of the colours be in reference to the greyscale I did manually, or will the greyscale be altered and the colours be wrong after the auto cal?
Yes, that is fine.
post #4869 of 5348
Quote:
Originally Posted by TomHuffman View Post

Use the Meter Correction module for this. It is explained in the Help file and manual. It is very simple. You take readings from a reference meter that correct readings from the field meter. In this case, the meters are the same, just initialized in different modes.

Thanks tom

This is used for profiling your screen characteristics and then measuring off the lens for the full cal? That's what I would like to try, rather than a full cal off the screen due to the retro reflective nature of the HP 2.4

Thanks
post #4870 of 5348
Hey Guys, I just got Chromapure and trying to get my readings with the AVSHD 703 DVD. Under the Chromapure chapter, I am unable to start any of the 10% measurements at zero%. I am using an oppo 103. Am I missing something
post #4871 of 5348
hi nexusdoan
what is your meter ? Between lines I am reading you are trying to measure 10% window pattern at 0% black. Is this true ? If so, note, measuring at low level takes much more time, It depends on your meter.
Also check from left menu : Options->Meter->Measurement Smoothing. Set Number Of Measurements to "1".
post #4872 of 5348
Hi prsut,

I am using the x-rite i1Display Pro

The DVD gives me the option the HCFR chapter but not in the Chromapure one, even though 0% is cleared listed as the first option but is jumps directly to 10% and you can get
to it.

I am trying to get a Grayscale reading from 0 - 100.
post #4873 of 5348
Lumagen Radiance XE/XE+/XE3D/XE/XE+/XE3D/Mini-3D/XD/XD3D New 120313 Firmware Update

Release Notes

Fix for some older HDMI/DVI displays (particular case was a DPI Titan 250) not showing video with last two firmware revisions (112513-120213).

Download Link
post #4874 of 5348
ChromaPure 2.4.5 is now available for download.

Release Notes

New Features

•The 75% of Rec. 709 gamut is now available throughtout the software, including for reporting.

•We added support for 5% and APL test pattern windows to the Lumagen video processors.

•We have added support for the Video Forge signal generator. To use this you must run the free Proxy software Fiddler (http://fiddler2.com/) in the background.
Enhancements

•We have improved the methods used for Lumagen auto-cal that will especially enhance performance for displays with initial large measured errors.

•We added support for Measurement Smoothing in the Meter Correction module.

Bug Fixes

•We have fixed the Measure All macro in the Advanced Color Management module.

•We have improved the stability of the Gamma module when using Continuous mode.
post #4875 of 5348
Would love to see display control added so that we wouldn't have to run Chromapure and ControlCal. Any future plans?
post #4876 of 5348
You mean integrate controlcal in chromapure?
post #4877 of 5348
Tom,

Let me be the 1st to thank u for supporting the VF! I will definitely try this the next time I can.
post #4878 of 5348
Quote:
Originally Posted by H Stevens View Post

Would love to see display control added so that we wouldn't have to run Chromapure and ControlCal. Any future plans?
It's on our roadmap.
post #4879 of 5348
Lumagen Radiance 20XX Series (2021, 2022, 2041, 2042) New 120313 Firmware Update

Release Notes

Small fix for some older HDMI/DVI displays not showing video. (If you see video then you can skip this update) (Update time ~3 minutes @57k)

Download Link
post #4880 of 5348
Guys, I have been using Chromapure with Lumgen but recently I bought Sony X905 4K and I was wondering if I can use the Chromapure without the Lumagen? Any advice will be appreciated.
post #4881 of 5348
Quote:
Originally Posted by kamenoff View Post

Guys, I have been using Chromapure with Lumgen but recently I bought Sony X905 4K and I was wondering if I can use the Chromapure without the Lumagen? Any advice will be appreciated.



Sony's Internal Calibrations controls features 2-pt RGB Balance (Grayscale) + some gamma settings (+-3), doing manual calibration with Chromapure you will have see some improvement (after spending some time) but since you have Lumagen the control points are much more to provide you using ChromaPure's AutoCal more accurate picture for sure.

post #4882 of 5348
Just want to say a huge thank you to Tom H. who has been super helpful in guiding me through using Chromapure as an absolute newbie. Just calibrated my first TV and love it. :-)
post #4883 of 5348
Did u callibrate the TV manually or used the Lumagen?
post #4884 of 5348
Lumagen Radiance 20XX Series (2021, 2022, 2041, 2042) New 120413 Firmware Update

Release Notes

Fix for an error in 112513-120313 updates which doesn't always get the input colorspace set up completely correct causing greens to be a little off and reporting incorrectly on the Info screen. (Update time ~3 minutes @57k)

Download Link
post #4885 of 5348
ChromaPure Calibration Disc

A calibration disc optimized for ChromaPure users is now available. This disc is free with Display 3 PRO bundles and available as a standalone for $25.

For more details click here.
post #4886 of 5348
Quote:
Originally Posted by ConnecTEDDD View Post

ChromaPure Calibration Disc

A calibration disc optimized for ChromaPure users is now available. This disc is free with Display 3 PRO bundles and available as a standalone for $25.

For more details click here.

6.5% windows only? What happened to the "10% to 12% windows are best for plasma" stance many "professionals" have opined?
post #4887 of 5348
Quote:
Originally Posted by ConnecTEDDD View Post

ChromaPure Calibration Disc

A calibration disc optimized for ChromaPure users is now available. This disc is free with Display 3 PRO bundles and available as a standalone for $25.

For more details click here.
$25 for the disc alone?!?! Yikes. That's surprising when there are comparable free options.
post #4888 of 5348
Just download the free AVSHD one. I did and it has a section for just Chromapure. Works like a charm.
post #4889 of 5348
Quote:
Originally Posted by HD-Master View Post

$25 for the disc alone?!?! Yikes. That's surprising when there are comparable free options.
I don't know what's so surprising. There are any number of commercial calibration discs available. Believe it or not, not everyone is comfortable with the task of downloading and burning their own disc and prefer a disc ready to use.
post #4890 of 5348
Quote:
Originally Posted by H Stevens View Post

6.5% windows only? What happened to the "10% to 12% windows are best for plasma" stance many "professionals" have opined?
This is a myth. There simply is no one size that is best for plasmas, and if there were it would be smaller than 10-12%. I wanted to keep it simple and 6.5% (which is the THX standard) seemed a good choice.
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