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Application of the morphological alpha shape method to the extraction of topographical features from engineering surfaces

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Figure

Fig. 1. Profile and surface envelope [10].
Fig 2. The closing envelope of an open profile by a disk.
Fig. 4. Computation of the dilation operation with the disk structuring element.
Fig. 5. Morphological closing envelope generated by the traditional method and the alpha shape method: (a) raw profile and closing envelopes; (b) Residual profiles obtained by subtracting the closing envelopes from the raw profile
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