User Guide

GNU Image Manipulation Program
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The result is very naturally looking noise.
This filter does not work with indexed images.
Resultatet ser svært naturleg ut.
Filteret verkar ikkje på indekserte bilete.
15.4.3.2 Options
Figure 15.69: ‘Scatter RGB’ filter options
Preview This preview displays interactively changes before they are applied to the image.
Correlated noise When checked, this radio button makes sliders R, G and B to move all together. The same relative noise will
be added to all channels in each pixel, so the hue of pixels does not change much.
Independent RGB When this radio button is checked, you can move each RGB sliders separately.
Red, Blue, Green and Alfa Sliders These slidebars and adjacent input boxes allow to set noise level (0.00 - 1.00) in each
channel. Alpha channel is only present, if your layer holds such a channel. In case of a grayscale image, a Grey is shown
instead of color sliders.
The value set by these sliders actually determine the standard deviation of the normal distribution of applied noise. The
used standard deviation is a half of the set value (where 1 is the distance between the lowest and highest possible value in
a channel).