npq_poly

Normalized central polygon moments

m = npq_poly(v, p, q) is the PQ'th normalized central moment of the polygon with vertices described by the columns of v.

Notes

• The points must be sorted such that they follow the perimeter in sequence (counter-clockwise).
• If the points are clockwise the moments will all be negated, so centroids will be still be correct.
• If the first and last point in the list are the same, they are considered as a single vertex.
• The normalized central moments are invariant to translation and scale.

See also

mpq_poly, mpq, npq, upq, Polygon

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