dither

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dither

[′dith·ər]
(communications)
A technique for representing the entire gray scale of a picture by picture elements with only one of two levels (“white” and “black”), in which a multilevel input image signal is compared with a position-dependent set of thresholds, and picture elements are set to “white” only where the image input signal exceeds the threshold.
(control systems)
A force having a controlled amplitude and frequency, applied continuously to a device driven by a servomotor so that the device is constantly in small-amplitude motion and cannot stick at its null position. Also known as buzz.
References in periodicals archive ?
Without dither the output of ideal ADC has quantization error
Tingle'' dithers on, you appreciate moments like that more and more.
In fact, we intend to publish the cartoons every time Major panics and dithers - so you might be seeing a lot of them
Devastated by Lee's abandonment, she dithers her way into a relationship with a pretty nice and enormously patient tabloid TV producer (Joe Mantegna).