Following known limitation of colorimeters profiling with RGBW display (WOLED), a new method has been proposed. The document is entitled “Calibration of Colorimeters for RGBW Displays”, authors Ben Bodner and Neil Robinson of LG Electronics USA, Santa Clara - CA. The paper can be found and bought here
The main idea is based upon dividing the Colour Gamut into three sub-colour and, therefore, to create a specific correction matrix for each of those.
Thrilled about that news, we (@Anger.miki
) have implemented the new method into an Excel file and made some comparison between the old FCCM and the new TMC (Three-Matrix Calibration) results. There we go:
As you can see, all TMC corrected values are under NIST tolerance, while we can’t say the same for FCCM’s. Quite promising! Isn’t it?
We’d like to share our experience in this particular path with all of you who are interested. So feel free to ask!
We are very curious and exited to know if TMC works well also with large profile (17p/21p cube)!
It is worth to know that:
- The above data are based on measurements taken with a Jeti 1501 (reference) and a i1D3 retail (target) on a 2018 LG OLED. Corrections are implemented using Microsoft Excel.
- About our curiosity on the application of TMC on 3DLUT, the idea is to start from an already generated 3DLUT, take out the FCCM corrections and applying the TMC corrections. Then verifying both and compare. That’s our next-future plan, but obviously we are open to ideas for a better validation/comparison of TMC vs FCCM.
- We can’t go deeper in describing the TMC method as far as the paper authors will not authorize us to do so @nezil 😊
- We are open to try your own data and measurements (we need spectro and colorimeter profiling data, your point measurements on both devices - please contact us privately). We will share outcomes!
- We used Light Illusion LightSpace because it is the only calibration software “on sale” that allowed us to implement TMC right into its profiles. Its measurement files are in an open format (xml) and, with a small amount of work, it allowed us to export, correct and then import back. That’s very useful for enthusiasts and professionals. It’s like LS already supported TMC even before it was designed!
Originally Posted by ConnecTEDDD
Three-Matrix Calibration Method for RGBW
For people who want to find more info related with that new method proposed, LG Electronics initially talked about that new proposed 3-matrix method for WRGB OLED's inside to:
78-1: Correcting Metameric Failure of Wide Color Gamut Displays article available @ SID Symposium Digest of Technical Papers Issue 49 (May 2018)
Last month, its been released a new article from LG Electronics, talking with more detail about that proposed 3-matrix method inside to:
83‐3: Calibration of Colorimeters for RGBW Displays @ SID Symposium Digest of Technical Papers Issue 50 (June 2019)
Documents are available for sale or free for SID members.
That method is not an industry standard, its an experiment, it will require some more testing to see if it will really works.
We would like to thank @ConnecTEDDD
as without him we would never have known about this new method.