HCFR - Open source projector and display calibration software - Page 411 - AVS Forum | Home Theater Discussions And Reviews
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post #12301 of 12314 Old 02-05-2020, 09:13 AM
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Hello

2019 Samsung QN65Q70AFXZC (Backlighting is Direct Full Array 4x) - HCFR display type?

Does anyone know the correct / closest match display type to use when calibrating a Samsung QN65Q70AFXZC using HCFR software and X-Rite i1 Display Pro.


Would one of this correction file work ?

https://colorimetercorrections.displ...%20Pro%29.ccmx

or

https://colorimetercorrections.displ...0Q9%2075_.ccmx

Thanks
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post #12302 of 12314 Old 02-10-2020, 08:20 AM
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Quote:
Originally Posted by hannes69 View Post
Many thanks for the link and your explanations, that helped me a lot!
I would never have thought that an average movie delivers only 10% brightness...
When I find the time, I will do 2 calibration runs, one with full fields and one with 10% window.
Then I will see how different the two results will be. In terms of numbers and visually.
Also see this post:
https://www.avsforum.com/forum/139-d...-patterns.html
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post #12303 of 12314 Old 02-14-2020, 04:37 AM
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Hy!
I calibrated my Benq W2000 projector. After the calibration based on the grayscale measurement, everything is fine and deltaE is below under 3 for all IRE.
But if I check the White clipping video from the AVSHD709 disc, I see a blue tint in the flashing white bars and I see the flashing white bars until the 241 bar.
Before the calibration process I have setting up the contrast where the 235 bar is not visible but the 234 does without any colorization or tint.
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post #12304 of 12314 Old 02-14-2020, 06:12 AM
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Quote:
Originally Posted by Tokodboy View Post
Hy!
I calibrated my Benq W2000 projector. After the calibration based on the grayscale measurement, everything is fine and deltaE is below under 3 for all IRE.
But if I check the White clipping video from the AVSHD709 disc, I see a blue tint in the flashing white bars and I see the flashing white bars until the 241 bar.
Before the calibration process I have setting up the contrast where the 235 bar is not visible but the 234 does without any colorization or tint.
To help diagnose please post your HCFR Before and After measurement files (chc), as well as the adjustments you made, in particular the Contrast and RGB Gain.
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post #12305 of 12314 Old 02-14-2020, 07:35 AM
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Originally Posted by Dominic Chan View Post
To help diagnose please post your HCFR Before and After measurement files (chc), as well as the adjustments you made, in particular the Contrast and RGB Gain.
Unfortunately, I did not save the file. I only can attach report files which is made with calman and the contrast and gain settings.
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post #12306 of 12314 Old 02-14-2020, 08:42 AM
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I changged
Brightness from 50 to 51
Contrast from 50 to 48

R-Gain: from 100 to 91
G-Gain: from 100 to 94
B-Gain: 100 untouched

R-Offset: from 256 to 253
G-Offset: from 256 to 251
B-Gain: 256 untouched

I can attach file until i have 5 comments
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post #12307 of 12314 Old 02-14-2020, 09:05 AM
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Quote:
Originally Posted by Tokodboy View Post
I changged
Brightness from 50 to 51
Contrast from 50 to 48

R-Gain: from 100 to 91
G-Gain: from 100 to 94
B-Gain: 100 untouched

R-Offset: from 256 to 253
G-Offset: from 256 to 251
B-Gain: 256 untouched

I can attach file until i have 5 comments
The RGB balance needs to be smooth even when things are not perfect. You have huge bumps at 70% and 90% which can cause problems with near white - unless you didn't re-measure those points after the adjustments.
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post #12308 of 12314 Old 02-14-2020, 10:23 AM
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Quote:
Originally Posted by Dominic Chan View Post
The RGB balance needs to be smooth even when things are not perfect. You have huge bumps at 70% and 90% which can cause problems with near white - unless you didn't re-measure those points after the adjustments.
The projector only has 2 point grayscale menu.
I used 30 IRE and 80 IRE patterns, as You can see at 80 IRE the values are good, so I dont know how can I smooth these bumps if i have only 2 point system.

I tried the other method when the green channels left untouched and I adjusted the red and blue channels to match the green but I got worse result.
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post #12309 of 12314 Old 02-14-2020, 10:36 AM
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Quote:
Originally Posted by Tokodboy View Post
The projector only has 2 point grayscale menu.

I used 30 IRE and 80 IRE patterns, as You can see at 80 IRE the values are good, so I dont know how can I smooth these bumps if i have only 2 point system.



I tried the other method when the green channels left untouched and I adjusted the red and blue channels to match the green but I got worse result.
I wouldn't worry about it with 2pt controls. The errors are within imperceivable values.
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post #12310 of 12314 Old 02-14-2020, 02:39 PM
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Quote:
Originally Posted by skschatzman View Post
I wouldn't worry about it with 2pt controls. The errors are within imperceivable values.
The OP is seeing blue tint in the flashing white bars
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post #12311 of 12314 Old 02-14-2020, 02:51 PM
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Quote:
Originally Posted by Dominic Chan View Post
The OP is seeing blue tint in the flashing white bars
Yes, and I do not understand why I see blueish color in the test pattern while the grayscale measurement gives me a good result. Maybe the test pattern is wrong?
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post #12312 of 12314 Old 02-14-2020, 03:33 PM
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Quote:
Originally Posted by Tokodboy View Post
Yes, and I do not understand why I see blueish color in the test pattern while the grayscale measurement gives me a good result. Maybe the test pattern is wrong?
Are you seeing blue only in the flashing white bars, or in the solid test patterns as well? If the latter then it depends on whether you trust your eyes more than the meter.
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post #12313 of 12314 Old Yesterday, 12:50 AM
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Quote:
Originally Posted by Dominic Chan View Post
Are you seeing blue only in the flashing white bars, or in the solid test patterns as well? If the latter then it depends on whether you trust your eyes more than the meter.
Only the flashing bars The solid bakcground is white.
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post #12314 of 12314 Old Yesterday, 09:08 AM
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Quote:
Originally Posted by Tokodboy View Post
Only the flashing bars The solid bakcground is white.
The blue tint resulted from you decreasing the R and G gains, which is equivalent to increasing B in a relative sense. This can be verified rerunning the grey-scale sweep and the near white sweep.

To do that you can use the HCFR internal patterns. Save the measurement file.
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