A stack blur filter can be used to create an approximation of a gaussian blur. The approximation is controlled by the number of times the {@link org.jdesktop.swingx.image.FastBlurFilter} is applied onto the sourcepicture. The default number of iterations, 3, provides a decent compromise between speed and rendering quality.
The force of the blur can be controlled with a radius and the default radius is 3. Since the blur clamps values on the edges of the source picture, you might need to provide a picture with empty borders to avoid artifacts at the edges. The performance of this filter are independant from the radius.
@author Romain Guy
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