This panel is available when using an XR license

When adding AR set extensions 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.

Colors do not match

Colors match

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

Not recommended

OK

Specify your setup

  1. Select the main AR machine

    • This machine will be used in the calibration process filming the LED wall

  2. 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

  1. Specify which calibration steps you would like to run (see below)

  2. 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.

  3. Start the calibration

Calibration steps

Calibrate LED wall

optional

  1. Analyses the color spectrum of the selected LED wall

  2. Generates LED color profile

  3. Assigns it to all XR machines

Color match AR to LED wall

main step

  1. Analyses the color spectrum of the selected LED wall

  2. Generates AR color profile

  3. Stores it in the show file where it gets used by all AR machines

Color analysis of the 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

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