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What (who) is dithering - definition
NOISE THAT REDUCES QUANTIZATION ERROR
Dithering; Didder; Riemersma dithering; Even toned screening; Image dithering; Dithered; Dithering algorithms
dither
¦ verb
1. be indecisive.
2. Computing display or print (a colour image) without sharp edges so that it appears to contain extra colours.
¦ noun informal
1. a state of dithering.
2. a state of agitation.
Derivatives
ditherer noun
dithery adjective
Origin
C17 (in the dialect sense 'tremble, quiver'): var. of dialect didder; related to dodder1.
dither
(dithers, dithering, dithered)
When someone dithers, they hesitate because they are unable to make a quick decision about something.
We're still dithering over whether to marry...
If you have been dithering about buying shares, now could be the time to do it.
VERB: V over wh/n, V about -ing/wh/n
dithering
<data, algorithm> A technique used in quantisation processes
such as graphics and audio to reduce or remove the
correlation between noise and signal.
Dithering is used in computer graphics to create additional
colors and shades from an existing palette by interspersing
pixels of different colours. On a monochrome display,
areas of grey are created by varying the proportion of black
and white pixels. In colour displays and printers, colours
and textures are created by varying the proportions of
existing colours. The different colours can either be
distributed randomly or regularly. The higher the
resolution of the display, the smoother the dithered colour
will appear to the eye.
Dithering doesn't reduce resolution. There are three types:
regular dithering which uses a very regular predefined
pattern; random dither where the pattern is a random noise;
and pseudo random dither which uses a very large, very
regular, predefined pattern.
Dithering is used to create patterns for use as backgrounds,
fills and shading, as well as for creating halftones for
printing. When used for printing is it very sensitive to
paper properties. Dithering can be combined with
rasterising. It is not related to anti-aliasing.
(2003-07-20)
Wikipedia
Dither
Dither is an intentionally applied form of noise used to randomize quantization error, preventing large-scale patterns such as color banding in images. Dither is routinely used in processing of both digital audio and video data, and is often one of the last stages of mastering audio to a CD.
A common use of dither is converting a grayscale image to black and white, such that the density of black dots in the new image approximates the average gray level in the original.
Examples of use of dithering
1. "Any dithering or delays ... and the Russian story will suffer." «
2. The "international community" cannot engage in its usual dithering.
3. For five months they‘ve been dithering, hoping something might turn up.
4. Brown‘s carefulness –– never moving without knowing where his foot will fall –– can come across as dithering.
5. He had been encouraged both by Soviet dithering and US support.