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Régions englobantes

Calculer l’enveloppe convexe, la forme alpha ou les limites autour des points

Créez des régions définies par des limites qui englobent un ensemble de points. La fonction boundary permet de spécifier l’étroitesse de l’ajustement autour des points, tandis que les fonctions convhull et convhulln renvoient la plus petite limite convexe. Les objets alphaShape proposent des paramètres de limite ajustables basés sur le rayon alpha ainsi que des fonctions d’objet pour calculer des quantités géométriques.

Fonctions

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boundaryBoundary of a set of points in 2-D or 3-D
convhullConvex hull
convhullnN-D convex hull
alphaShapePolygons and polyhedra from points in 2-D and 3-D
alphaSpectrumAlpha values giving distinct alpha shapes
criticalAlphaAlpha radius defining critical transition in shape
numRegionsNumber of regions in alpha shape
inShapeDetermine if point is inside alpha shape
alphaTriangulationTriangulation that fills alpha shape
boundaryFacetsBoundary facets of alpha shape
perimeterPerimeter of 2-D alpha shape
areaArea of 2-D alpha shape
surfaceAreaSurface area of 3-D alpha shape
volumeVolume of 3-D alpha shape
plotPlot alpha shape
nearestNeighborDetermine nearest alpha shape boundary point

Rubriques

  • Computing the Convex Hull

    This topic explains several methods for computing the convex hull using convhull, convhulln, delaunayTriangulation, and alphaShape.

  • Types of Region Boundaries

    This topic explains the differences between several types of boundaries that enclose a set of points.