Originally Posted by ebr9999
My conclusion: honestly I was expecting more from this 1DLUT Autocal. What concerns me the most is the color shift at high IRE. I have done some tests with Calman, based on 04.10.55 and I have got results in line with my manual calibration. It looks like the way my pannel reacts is not expected by LS software, and augmented data don't fix it. I am not a fan of Autocal, for its absenze of back-up, but combining its 1DLUTgeneration with LS 3DLUT generation looks, at least on my pannel, the most effective approach.
My next step will be 3DLUT generation, based on my manual calibration
The issue you see, its not related with LightSpace.
There issues LG's have internally with 1D LUT processing, we had seen the same when the LG 2018 Template was ready, about May 2018, but the reason we (we = the calibration enthusiasts I mean) LG 2018 Template released at March 2019 it was because we were seeing a lot of more CalMAN's LUT issues by using LG's (exclusive from CalMAN only) LUT capabilities to be reported here in AVSForum.
Below you can find several posted CalMAN LUT engine problems using LG 2018 OLED TV's, a lot of these issues explained using LightSpace tools at many AVForum.com posts:
- 37 38
The analysis of the issues from me or other LightSpace users for these CalMAN problems, helped CalMAN to resolve partially some issues, which was generally good for all CalMAN customers (those from Hollywood also where they never seen anything). Tyler (wifi-spy) has Thanked me and LightSpace users for that help.
No of the data above came from my personal measurements, all these are users data.
Since we saw that people have spend already a lot of their personal free time (which is limited for all), we released the LG Template to public for free, for LG TV users to be able to have other calibration options, to resolve their issues and be able to spend more of their free time on watching films than spending time with measurements.
There several posted reports @ AVSForum.com from users who used LG 2018 OLED TV's LUT capabilities with LightSpace, you can see below:
The same happened for LG 2019 Template also, its was ready from May 2019 but we released it last week.
To give you an example, the before some days to the Warner Bros Shoutout, the LG C9 there had been calibrated using LG 2019 Template and LightSpace.
Another example is that available LG 2019 Template for PQ Curve Tool Upload, just we haven't released it yet, because I'm not ready to support the questions or haven't written the instructions, but it will be free for all users, since that tool is not affecting calibration, the user can use whatever software he is happy to use for his setup HDR10 calibration, since the PQ curve upload is just a parametric control of tone mapping of a menu which is not available to normal TV menu or service menu.
Light Illussion has contact LG many times to ask for integration with LG, but LG has never send any single reply, while the most important document related for AutoCAL and LG capabilities which I posted (world's first) here...
talking about contacting with LG asking for API, so because we see that LG is not interesting, 'we' (the enthusiasts) released the LG Template to public. (since even CalMAN 3rd party file upload capability was broken for at least months).
I'm giving these details above to showcase the the group of enthousiast/friends we have, they have tested virtually everything, aiming to have the best possible picture, at this point we (the enthusiast team I mean) don't care what calibration solution we will use, the main priority is to have the best possible picture, all team members have both CalMAN and LightSpace software, but for the LG we use only LightSpace with DeviceControl, since that way provides the best end results with measurements and visually looking also.
The real problem for the issue you see now, is related with internal LG 1D LUT problem, its happening to most of the models from various different countries. The problem is that seems there many variations of electronics around the world or TV versions per region or manufactured dates.
The main problems are 3, and all related with internal 1D LUT.
1) When you will Enable calibration, using CalMAN or LG Template for DeviceControl for that, the TV acts differently. A CalMAN user has upload a video about this problem from a 2019 LCD model
, but his finding have been totally ignored.
I have a question about...
Below there 2 APNG files (Animated PNG), 2 pictures will swap with 1 sec interval to show the difference with Enabled and Disabled Calibration:
You can say....OK, since there available that difference, if we take measurements with Disabled the calibration it will be OK, Yes, but there also the 2 following problems.....
2) There difference with the 1D LUT table you upload internally to the TV from the one that is actually generated, due to some LG processing they are not matching....
To realize that, instead of loading the 1D LUT internally to the LG, load it as LightSpace's Active LUT and perform a Grayscale Large measurement run.
So LightSpace, will load the correction 1D LUT as an offset to your pattern generator output. This is the exact procedure used for years in professional market to locate similar issues.
Once you will have generated the 1D LUT correction table (...and you have that table opened) without applying any videoscale filter, go to LightSpace -> Calibration Interface -> Quick Profile, and select that LUT file as 'Active LUT':
... and LightSpace will load your LUT values and modify the patch generator colors based to your LUT from LightSpace generated values, this is a procedure they performing a lot in post-production to verify that kind of issues stuff....so you can load any external 1D/3D LUT file you want... which is ideal for LUT checking before uploading into a display or external 3D LUT box, to easier locate where is any issue... to the setup/hardware or level mismatch issue or internal processing etc.
With that way, you can verify (without having bought any external 3D LUT Box, without uploading anything internally to a LUT capable LG, or to test other TV/Projector you are thinking to buy a LUT Box how it will improve your color accuracy....before buying it.
This is not a new feature of LightSpace, its added before about 10 years.
Measuring the Grayscale as Active LUT and then mearing the same grayscale with the 1D LUT table loaded internally to the TV, you will find differencies.
These differences, we have found when initially tested internal LUT capabilities, this was one reason the 'Aug' feature added.
The issue its been explained there also:
...and Steve Shaw has mentioned that problem again here:
3) When you reset the 1D LUT of TV from DeviceControl or CalMAN, there is a visible banding to the screen, at least to 4x 2018 OLED we have tested, to one was not visible.
To do that test, just display a grayscale ramp pattern before you will click to reset 1D LUT, when you will reset, you will see banding to the grayscale ramp, since with UNITY values it has banding, its impossible to use the internal 1D LUT table for calibration, at least for now.
So its better to not reset the 1D LUT table, do manual cal of 100% White using RGB-High and set Brightness to a value that is correct for the TV near black performance and then perform a 3D LUT, where inside to the 3D LUT it will contain 33-Point Grayscale also. Also when you take any measurement leave disabled the calibration from DeviceControl.