algorithm for the surface blur filter in photoshop
Posted on 2011-10-21
I was wondering if there were any examples of how to implement the surface blur filter in photoshop.
This is the description:
Surface Blur Blurs an image while preserving edges. This filter is useful for creating special effects and for removing noise or graininess. The Radius option specifies the size of the area sampled for the blur. The Threshold option controls how much the tonal values of neighboring pixels must diverge from the center pixel value before being part of the blur. Pixels with tonal value differences less than the Threshold value are excluded from the blur.