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Calibration Script

Reads the output (*.cal) from a DisplayCal calibration and converts it to header file with lookup tables for the firmware.

Howto run a calibration

  1. Start DisplayCal and choose Web @ localhost as Display
  2. Start the Octopus.Apps.Calibrator app. It will read the required values from DisplayCal and render them on the pixel.
  • You might need to adjust the app to select the right pixel for calibration.
  1. In DisplayCal start the calibration, make sure "Interactive Display Adjustment" is enabled
  • Use the gamma 2.2 Curve, it has shown the best results.
  • Other settings on "As Measured"
  • Very high calibration speed is good enough
  1. Start the initial adjustments with "Start measurement"
  • Adjust the red/green/blue correction ratios in Octopus.Apps.Calibrator until the colors are at the right levels
  • The color levels are much more important than the right brightness.
  1. Go on "stop measurement" and "Continue to Calibration"
  • This will take 30-60 min
  1. Copy the resulting .cal file into this directory (mac: ~Library/Application\ Support/DisplayCAL/storage/)
  2. Transfer the r,g,b corrections values from 4) to the convert.exs script
  3. Exectue the script with the filename as argument. ./convert.exs $filename.exs
  4. Copy the rendered Pixel_corrections.h into the firmware.