Abstract
Envelope filters are an entirely different class of filters. The mean lines are generated by rolling balls or sliding planes, and not by averaging a weighting function on the profile. We describe how the envelope mean line may be computed from a surface profile with a simulated ball rolling over a surface. The envelope filters are a subset of the broader class of morphological filters. We describe the different morphological filtering operations such as dilation, erosion, opening and closing in this chapter and illustrate the methods using example profiles. We also extend the discussions to 3D morphological filtering in this chapter.
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(2009). Envelope and Morphological Filters. In: Computational Surface and Roundness Metrology. Springer, London. https://doi.org/10.1007/978-1-84800-297-5_12
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DOI: https://doi.org/10.1007/978-1-84800-297-5_12
Publisher Name: Springer, London
Print ISBN: 978-1-84800-296-8
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