Gamma Calibration — Stripe-Fusion Comparison

γ1.8
γ2.0
γ2.2
γ2.4
LumaSquint or step back 2m: your gamma is whichever reference block merges with the stripes
Features

Professional Gamma Inspection

A professional gamma tool: fine black/white stripes that fuse into mid-gray at a distance sit beside four computed gamma references — squint or step back, and whichever merges is your gamma.

Stripe-Fusion Principle

Fine 2px stripes fuse into mid-gray from afar; matching them to computed references reveals actual gamma.

Four References Side by Side

γ1.8 / 2.0 / 2.2 / 2.4 on one screen — locate your system gamma with no instruments.

Three Luma Levels

Compare at 25/50/75% to verify gamma consistency across dark and bright ranges.

Concepts

What Is Gamma?

Gamma γ

The Curve

The power-law mapping from pixel value to luminance. sRGB’s ~γ2.2 darkens midtones to match perception and use bits efficiently.

EOTF

EOTF

The modern name. SDR uses γ2.2/2.4; HDR uses PQ/HLG — the foundation of color science.

2.2 vs 2.4

By Environment

γ2.2 for bright offices, γ2.4 (BT.1886) for dark-room viewing. Deviations make everything look washed out or murky.

How to

Three Steps to Read Gamma

01

Go Fullscreen

Set daily brightness and fullscreen the comparison chart.

02

Squint or Step Back

Squint or step back 2m so stripes fuse. Whichever column’s two blocks merge — that is your gamma.

03

Triple-Check

Repeat at 25/50/75% luma. Consistent results mean a healthy gamma curve.

Compare

Four Calibration Tiers

OSD Controls

Free
  • · Monitor gamma presets
  • · Coarse 1.8/2.2/2.4
  • · Factory-reset first
  • · Limited precision

GPU Panel

Free
  • · NVIDIA/AMD/Intel panels
  • · Fine gamma slider
  • · Saves ICC profile
  • · Software-level effect

DisplayCAL

Advanced
  • · Open-source & free
  • · Needs a colorimeter
  • · Builds ICC curves
  • · Down to ΔE<1

Hardware 3D LUT

Pro
  • · In-monitor LUT calibration
  • · No GPU output cost
  • · EIZO / BenQ SW
  • · Print-grade accuracy
Tips

Pro Tips

Reset Before Calibrating

Factory-reset the monitor first so leftover OSD presets don’t interfere.

Recalibrate Quarterly

Backlights drift over time — pros should recalibrate every 1-3 months.

In-Game Gamma

Many games have their own gamma slider; calibrate the system first for accurate shadow detail in games.

Calibrate Each Display

Two monitors need separate calibrations and ICC profiles — one config never fits both.

FAQ

FAQ

Recommended Test Environment

  • Calibrate under your usual lighting
  • Brightness at daily level
  • Disable night mode / filters
  • View from 2m or squint
  • 15-minute warm-up
  • Recheck all three luma levels
Related

Related Tools

Device Guides

Gamma performance feeds into the Wizard verdict — run all checks in one flow.
Open Test Wizard