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Monitor ghosting test

Slide a moving object across the screen at a set speed against white, grey, or black to reveal trailing from slow response or halos from overdrive.

What you are reading by eye: a dark smear trailing behind the block is the panel responding slowly, ghosting in the plain sense. A bright halo or reversed image in front of the block is inverse ghosting, overdrive compensation set too far. This test shows neither as a number: no response time is measured, and frame drops from a busy system can fake both, which is what the frame-rate readout is there to catch. Run it on the background you will actually work on; trails show best on dark backgrounds, halos on light ones.
Options

More device tests

- Refresh rate test (/device/refresh-rate)
- Dead pixel test (/device/dead-pixel)
- Screen recorder (/device/screen-recorder)
All device tests (/device)

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Canonical HTML: https://nutter.tools/device/ghosting-test
Markdown version: https://nutter.tools/device/ghosting-test.md
Plain-text version: https://nutter.tools/device/ghosting-test.txt
Agent index: https://nutter.tools/llms.txt