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 AR render machine
The color matching panel does the whole calibration for you. Just follow the steps listed below.
Prepare for calibration
For the calibration to be as accurate as possible make the following preparations.
Set up production ready stage lighting
Set up production ready ambient lighting
Disable automatic white balance
Do white and black balance
Disable dynamic aperture/exposure
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
Compositing color space needs to be set to Linear space in SETUP > Show > Show settings.
OK, if color grading is the same across machines.
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
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
Calibrate LED wall
Color match AR to LED wall
During color analysis
Do not move the camera
Do not occlude the camera view
Do not change the lighting
Possible warnings during color analysis
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
The advanced tab allows to manually reassign the generated