User Guide

GNU Image Manipulation Program
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15.10.16 Wind
15.10.16.1 Overview
Figure 15.169: ‘Wind’ filter example
(a) Original image (b) Filter Wind applied
You can find this filter through Filters → Distorts → Wind.
The Wind filter can be used to create motion blur, but it can also be used as a general distort filter. What is characteristic about
this filter is that it will render thin black or white lines. Wind will detect the edges in the image, and stretch out thin white or
black lines from that edge. This is why you can create the illusion of motion, because the edges are what will be blurred in a
photograph of a moving object.
15.10.16.2 Options
Figure 15.170: ‘Wind’ filter options
The interface is quite simple. You can set the Strength of the wind and a Threshold value. Threshold will restrict the effect
to fewer areas of the image. Strength controls the amount of wind, so a high value will render a storm. You can also increase
the effect by setting the Style to Blast, which will produce thicker lines than Wind.