Calibrate color matching

This panel is available when using an XR license

When adding a virtual set extension to an XR setup, matching the colors of the LED walls to the AR graphics manually is tedious. A variety of components in the video chain have an impact on the output colors

the XR render machine
the Display Processor for the LED wall
the LED wall itself
the on set lighting
the camera
the AR render machine

The color matching panel does the whole calibration for you. Just follow the steps listed below.

Calibration

Prepare for calibration

For the calibration to be as accurate as possible make the following preparations.

Lighting

Set up production ready stage lighting
Set up production ready ambient lighting

Camera settings

Disable automatic white balance
Do white and black balance
Disable dynamic aperture/exposure

Camera setup

Aim the camera at the center of the LED wall
Zoom in so the camera frames only the LED wall
Be out of focus (blurred image)
Lock off the camera head

Show settings

Compositing color space needs to be set to Linear space in SETUP > Show > Show settings.

Color grading

	3D Graphics	Video	Final output
XR machines	OK, if color grading is the same across machines.	Not applicable	Not recommended
AR machines	OK, if color grading is the same across machines.	Not recommended	OK

Specify your setup

Select the main AR machine
- This machine will be used in the calibration process filming the LED wall
Select your XR machines
- These machines will be used in the calibration process for displaying. To only use specific machines during the calibration process, enable the checkbox below and select a subset of machines.

The generated AR color profile will be automatically used by any machine running AR
The generated LED color profiles will be assigned to the selected XR machines

Configure process

Specify which calibration steps you would like to run (see below)
Set the sample number of the profile
- Larger values can improve the result, but they increase the time for analysis significantly. Higher quality LED walls require fewer samples. Values between 7 and 15 usually give good results.
Start the calibration

Calibration steps

Calibrate LED wall	optional	Analyses the color spectrum of the selected LED wall Generates LED color profile Assigns it to all XR machines
Color match AR to LED wall	main step	Analyses the color spectrum of the selected LED wall Generates AR color profile Stores it in the show file where it gets used by all AR machines

During color analysis

Do not move the camera
Do not occlude the camera view
Do not change the lighting

Possible warnings during color analysis

Message	Suggestion
Could not determine the display's latency	Ensure that the camera is aimed at the display properly and that a valid video signal is present.
Detected latency is X frames	This happens when latency is more than 30 frames. Consider checking the delay values in Director and that the camera is aimed at the display properly.
CAUTION camera exposure too low	Increase camera exposure and restart calibration.
CAUTION color gamut clamp	Check the color format to match the LED’s wall gamut capacity and restart calibration.
CAUTION sync issue during calibration	May happen on temporary higher latency (e.g. high GPU load in Editor). Check your setup or enable +15 frame delay option and restart calibration

After color analysis

Making changes to, for example, the video white point should be done through the Color grading panel and not on the camera itself

Advanced

The advanced tab allows to manually reassign the generated

AR profiles
LED profiles