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 ?
We have dithered over the Metro tram system and the indications are that the Government may turn down our bid for help.
We are facing a major housing crisis in Wales and WAG has dithered and dithered and has done absolutely nothing on this issue.
WHEN RUMORS erupted on the Internet that John Kerry had cheated on his wife, the mainstream media dithered over whether to cover it.