Motion Blur
The streaking or smearing of an image caused by subject or camera movement during the exposure period. Appears as directional blur along the axis of motion.
Motion blur is the phenomenon where an image stretches along the direction of movement due to displacement during exposure. Longer shutter speeds and faster velocities produce greater blur.
Shutter angle controls blur amount in cinematography. For example, at 180 degrees the shutter is open for 50% of the frame interval, approximately 1/48 second at 24fps.
- Linear motion blur: Caused by straight-line movement. The PSF approximates a rectangular function along the motion direction, a model used in
deconvolutionrestoration - Rotational motion blur: Produced by spinning objects like propellers. The PSF follows an arc pattern
- CG motion blur: One rendering approach computes per-pixel velocity vectors and applies blur as a post-process. Higher sample counts yield smoother results at increased cost
- Deblurring: Blind deconvolution and deep learning methods aim to restore sharp images from blurred inputs
Some game engines implement screen-space motion blur using velocity buffers.