Editing Posterization (section)

==Video posterization {{anchor|Temporal posterization}} ==
Temporal posterization is the [[visual effect]] of reducing the [[frame rate|number of frames]] of [[video]], while not reducing the total time it takes the video to play. This compares to regular posterization, where the number of individual color variations is reduced, while the overall range of colors is not. The motion effect is similar to the effect of a flashing strobe light, but without the contrast of bright and dark. Unlike a [[Telecine|pulldown]], the unused frames are simply discarded, and it is intended to be apparent (longer than the [[persistence of vision]] that [[video]] and [[Film|motion pictures]] normally depend on). An [[GIF|animated GIF]] often looks posterized because of its normally-low frame rate.

More formally, this is [[downsampling]] in the time dimension, as it is reducing the resolution (precision of the ''input''), not the bit rate (precision of the ''output,'' as in posterization).

The resulting stop-go motion is a temporal form of [[jaggies]]; formally, a form of [[aliasing]]. This effect may be the intention, but to reduce the frame rate without introducing this effect, one may use [[temporal anti-aliasing]], which yields [[motion blur]].

Compare with [[Slow motion#Time stretching|time stretching]], which ''adds'' frames.