posterize

/ˈpəʊstəɹaɪz/

IPA: /P OW1 S T ER0 AY0 Z/

verb
  1. 1

    To reduce the number of colors in an image, changing a continuous gradation of tone to several regions of fewer tones, with abrupt changes from one tone to another.

  2. 2

    : To score a slam dunk by leaping over another player.

Source: https://en.wiktionary.org/wiki/posterize