Noise reduction

(redirected from Image noise reduction)

noise reduction

[′nȯiz ri‚dək·shən]
(engineering acoustics)
A process whereby the average transmission of the sound track of a motion picture print, averaged across the track, is decreased for signals of low level; since background noise introduced by the sound track is less at low transmission, this process reduces noise during soft passages.

Noise reduction

Reducing the level of unwanted sound by any of several means of acoustical treatment.

noise reduction, NR

The difference in decibels between the average sound pressure levels produced in two rooms by a sound source in one of them.
References in periodicals archive ?
The software is targeted at image noise reduction for high-resolution still images.
A new evaluation method for image noise reduction and usefulness of the spatially adaptive wavelet thresholding method for CT images", Australasian Physical and Engineering Sciences in Medicine, 35(4): 475-483.