Illusory motion
（重定向自Motion illusion）
![Billboards and other electronic signs use apparent motion to simulate moving text by flashing lights on and off as if the text is moving.](/Images/godic/202501/28/Tsq_green_chairs_jeh3305.jpg")
The term illusory motion, also known as motion illusion, is an optical illusion in which a static image appears to be moving due to the cognitive effects of interacting color contrasts and shape position. Apparent motion is the most common type of illusory motion and is perceived when images are displayed in succession at a specific frame rate such as in a movie.