Output
Steady colors, steps or fine-line patterns
UserBenchmark / All Tools / Gamma Test
Display
Gamma Test
Compare fine black-and-white lines with reference gray patches at native zoom.
Free to useNo downloadNo sign-up
Gamma Test · At a glance
Quick answer: Compare fine black-and-white lines with reference gray patches at native zoom. The comparison is a visual approximation influenced by scaling, panel structure and eyesight.
Gamma Test
The test loads when you open it. Device access is requested only after you choose to start.
Detailed guide
How to use this tool
- Use native resolution and 100% zoom.
- Compare the apparent brightness of fine black-and-white lines with the adjacent gray patches.
Input
Manual visual inspection
Browser requirement
Native resolution; fullscreen support
Processing
Runs on your device; no tool-result upload
How it works and what the result means
These are visual inspection patterns. The page cannot read individual panel pixels, measure nits or contrast ratio, diagnose a panel automatically, or repair dead pixels.
Reading the result
The comparison is a visual approximation influenced by scaling, panel structure and eyesight. It is not an ICC profile or instrument reading.
Worked example and assumptions
Alternating black/white lines with reference patches
At 100% zoom and native resolution, compare the apparent average brightness of fine lines with gray patches. Scaling and panel structure affect this visual approximation.
At 100% zoom and native resolution, compare the apparent average brightness of fine lines with gray patches. Scaling and panel structure affect this visual approximation.
What to check next
If lines blur or form a moiré pattern, check scaling and viewing distance. Avoid applying a setting from a screenshot viewed on another screen.
Use native screen resolution and 100% browser zoom for fine patterns. Disable adaptive brightness for comparisons. PWM inspection needs an external camera; banding can also be a camera artifact.
Frequently asked questions
Can this calibrate color accurately for print?
No. Color-critical profiling needs a suitable instrument and controlled workflow. The visual pattern is a preliminary check.
How do I start the Gamma Test?
Choose a pattern and open fullscreen. Inspect the entire panel, then click to cycle patterns. Press Escape to leave fullscreen.
Does this tool require a download or an account?
No. Open the interactive tool above in a modern browser. The instructions and explanations are available even with JavaScript disabled; running a test needs JavaScript.
Why can two attempts give different results?
Power settings, background tasks, browser scheduling, operating-system input processing and device settings affect measurements. Compare repeated attempts with identical settings rather than the single highest score.