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PsyCalibrator

PsyCalibrator is a free, open-source package for measuring display luminance and color and calibrating gamma.

Place
#10 of 24
Score
6.0
PsyCalibrator's website

What PsyCalibrator is

PsyCalibrator is a free, open-source package for measuring display luminance and color and calibrating gamma. It uses a Spyder5, SpyderX, or SpyderX2 instrument to measure a display and return CIE 1931 xyY coordinates. Its correction workflow makes the relationship between RGB intensity and luminance linear, either across grayscale or for individual color channels. The fitting process incorporates Mcalibrator2 and uses cubic spline interpolation as its main method. Users can apply gamma correction through a color lookup table and restore the display to its uncorrected state. The package supports Windows, macOS, and Linux, and its listed capabilities include multi-monitor calibration. Getting started requires MATLAB or GNU Octave, Psychtoolbox, and one of the supported Spyder instruments. The tutorial says Windows users need a photometer driver, while Linux and Mac users do not. SpyderX and SpyderX2 can use built-in Windows 10 or 11 drivers with Psychtoolbox 3.0.19 or later. Measurement guidance advises keeping ambient light constant and ensuring the sensor area is smaller than the target stimulus.

Good

  • Returns CIE 1931 xyY measurement coordinates.
  • Supports grayscale or individual-channel gamma correction.
  • Gamma correction can be applied through a color lookup table.
  • Supports Windows, macOS, and Linux.
  • Includes multi-monitor calibration.

Watch out

  • Requires MATLAB or GNU Octave and Psychtoolbox.
  • Requires a Spyder5, SpyderX, or SpyderX2 instrument.
  • Windows users need a photometer driver.

Who it suits

PsyCalibrator suits research workflows that involve luminance and color measurement or monitor correction. It is intended for users with a supported Spyder instrument and MATLAB or GNU Octave with Psychtoolbox.

Verdict

PsyCalibrator provides display measurement and correction workflows for supported instruments and research use. Check the software and hardware requirements before setting it up.

Plans and prices

From PsyCalibrator's own pricing page, checked 8 Oct 2026.

All about pricing
PlanPriceWhat it gives you
PsyCalibratorFreeFree package · requires MATLAB or GNU Octave, Psychtoolbox, and a Spyder5, SpyderX, or SpyderX2 instrument

The facts

Each one read from PsyCalibrator's own pages, with the date it was checked.

What it does

Authors
The repository lists Zhicheng Lin, Qi Ma, and Yang Zhang as authors and gives their university affiliations in China.checked 8 Oct 2026
Compatibility limit
SpyderX/X2 can use built-in Windows 10/11 drivers with Psychtoolbox 3.0.19 or later, according to the tutorial.checked 8 Oct 2026
Correction control
Users can apply gamma correction with a color lookup table and restore the display to its uncorrected state.checked 8 Oct 2026
Data fitting
Its fitting workflow incorporates Mcalibrator2 and describes cubic spline interpolation as its main fitting method.checked 8 Oct 2026
Display correction
It calibrates displays so the relationship between RGB intensity and luminance is linear, including individual color channels or gray.checked 8 Oct 2026
Hardware requirement
The tutorial names Spyder5, SpyderX, or SpyderX2 as the supported measurement instruments.checked 8 Oct 2026
Intended users
The tutorial describes using the package for luminance and color measurement and monitor correction in research workflows.checked 8 Oct 2026
Measurement
It uses Spyder5, SpyderX, or SpyderX2 hardware to measure luminance and color and returns CIE 1931 xyY coordinates.checked 8 Oct 2026
Measurement guidance
The tutorial advises keeping ambient light constant and ensuring the sensor area is smaller than the target stimulus for accurate measurement.checked 8 Oct 2026
Operating systems
The instructions discuss Windows, Linux, and Mac; they say Windows users need a photometer driver while Linux and Mac users do not.checked 8 Oct 2026
Purpose
PsyCalibrator is an open-source package for display gamma calibration and luminance and color measurement.checked 8 Oct 2026
Software dependencies
The tutorial requires MATLAB or GNU Octave and Psychtoolbox.checked 8 Oct 2026

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