Ghosting, motion blur and overdrive explained
Check your monitor for ghosting, motion blur and overdrive artifacts. Moving objects run at full, half and quarter frame rate side by side, on five backgrounds that expose different pixel transitions. The test shows your live refresh rate, the expected blur in pixels, a frame-skip strip for camera checks and an optional pursuit-camera sync track.
Motion blur on modern screens comes mostly from sample-and-hold: each frame stays on screen until the next one, so your eyes smear it as they track motion. It shrinks as refresh rate rises. Ghosting is a faint copy trailing the object, caused by pixels that change color slowly. Overdrive speeds up pixel changes, but too much overdrive overshoots and leaves bright or dark halos, called inverse ghosting or coronas.
