5. Morphological filtering
Unlike filters defined in other areas of image processing (by convolution, for example), morphological filters are defined by algebraic properties: a filter is an increasing, idempotent operator. Immediate examples are algebraic openings (which are also anti-extensive) and algebraic closures (which are also extensive). If (γ i ) is a family of openings, is also an opening and therefore a morphological filter. Similarly, if is a family...
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Morphological filtering
All-or-nothing and skeleton transformation
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