18. The Gaussian Filter


When you’re driving, your tires, shock absorbers, and suspension remove most of the harsh vibrations from the road. In surface texture analysis, filtering has much the same effect: separating larger “waviness” structures from the finer “roughness.” The most common filter type is the Gaussian filter, which acts like the perfect shock absorber in terms of separating waviness and roughness…but it does have nuances. In this video we show how the Gaussian filter works, and we share some details you need to understand in order to decide when and how to use this filter type.


If you’re working with plateaus and/or extreme features, be sure to also check out our Fake Peaks & Filters Notepad video.