Rörelseeftersläpning

Rörelseeftersläpning, often translated as motion blur or persistence of vision in English, refers to the visual effect where the perception of motion appears smeared or trailed. This phenomenon can occur in several contexts. In photography and videography, it happens when a subject or camera moves during the exposure time of a single frame, resulting in a streaked image. The faster the movement or the longer the exposure, the more pronounced the blur.

In the realm of human vision, the term "persistence of vision" describes how the eye retains an image for a fraction of a second after it disappears. This is crucial for our perception of motion in films and animations. When a series of still images are displayed rapidly, our brain blends them together, creating the illusion of continuous movement due to this persistence. If the frame rate is too low, or if there are significant changes between frames, noticeable flicker or jerky motion can occur, which is related to the limitations of this perceptual mechanism.

The effect can also be observed in digital displays, such as monitors and televisions, where the pixel response time can lead to motion blur. If pixels do not change color quickly enough to keep up with fast-moving images, trailing artifacts can be visible. Understanding and managing rörelseeftersläpning is important in various fields, from artistic expression in photography to technical considerations in display technology and the creation of fluid visual experiences in entertainment.