FAQ

April 5, 2022

Basic RGB Display Gamut Test

This Workflow calculates the display gamut volume and makes it easy to compare with any RGB or CMYK ICC reference profile. It is an excellent tool to compare multiple displays or the display to any reference profile i.e. AdobeRGB.

This workflow reports important information about your current displays gamut defined by the generated ICC Profile and current calibration. It is important to review display basic knowledge in order to understand results

Important Notes

  • Your monitor is always using an ICC profile even if you never made one or configured one.
  • An ICC Profile is a critical component of monitor calibration. ICC Profiling and calibration are confusing terms and they are important to understand. Learn more about it here!
  • If you change monitor brightness or contrast your ICC profile will no longer be valid.
  • If you are using any solution that adopts your screen brightness automatically - it invalidates any ICC profile 
  • There is no good factory generic profile - if you need to trust viewable colors, you have to create a custom ICC profile periodically over time
  • Due to observer metamerism, a high quality ICC profile needs to be adjustable by the user; two different users may require two different adjustments for the same ICC display profile for the same display!
  • CC Display meets the needs of high demanding users, how ever some knowledge is required - ChromaChecker is providing enhanced information for the professional users.

 Gamut Test

Select and execute Gamut Test workflow

At this point, you see a summary of your profile - and some statistics when compared to any Reference profile (the user may select any RGB or CMYK Profile to compare to) a 3D plot provides a detailed comparison. 

 

After the measurement, do not click "Done" - instead click on the first dot below the 3D graph to enter Chromaticity Diagram.

When measurements are completed click on the first dot 

How to interpret the Chromaticity diagram?

  • Red (sRGB), Green (Adobe RGB), and Blue (P3 DCI) are common RGB spaces plot to easily compare how your display compares to common standards. 
  • Gray curve in the middle of CIE diagram- Planck (Blackbody) Curve - this is where the different color temperatures of the White Point can be found



  • Black Circle shows the White Point of the active ICC Profile that the System Color Management Engine currently is using to render color on display
  • Black Triangle - shows the ICC Profile installed in the System Color Management
  • Black Dots - represents all measured color samples used for Gamut Evaluation

 

Potential problems - how to detect and fix them

If outer dots (measurements) are not exactly on the black triangle, that means your system profile doesn't correspond to real gamut - this is usually due to at least one monitor parameter (calibration) has been changed since profile was created or the selected profile was not created on this particular display. A new ICC profile has to be created if color accuracy is desired.

If you expect i.e. D50 but the description next to the internal circle is reporting a different value - your ICC Profile is created for a different viewing purpose. If you are wanting to match graphic arts standards and an ISO 3664 D50 illuminant, you have to recreate the ICC profile.

 

Above is an example of an ICC Profile delivered with the display by the manufacturer (generic model profile)  Review the green area or the above graphic, the dots are not on the lines representing the ICC Profile and the White Point is 6516°K. This profile doesn't represent a this display's gamut. It will not be accurate in any soft proofing scenario.

 

Conclusion

The Basic Gamut Evaluation Test is a free tool that helps users understand the importance of properly maintaining displays and how CC Display can easily maintain the displays and deliver precise and accurate color that you can trust.

ChromaChecker provides some basic tools for free to help users demanding accurate color to understand the importance and benefits related to controlling their display. ChromaChecker Cloud-based system prevents users from setting improper, and inconsistent settings which ensure color teams are viewing the same color no matter where each team member is located.

 

Configuration of Workflow within ChromaChecker Display Inspector? 

 

Important note: 

The gamut option is selected it can't be joined with Profile Creation! 
For regular use (not demonstration purposes only) it is good to add Calibration as a part of the workflow. In this way, the gamut can be calculated for specific display's pre-settings.

 

 

 

Contact ChromaChecker Support

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