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toolkit.filtering

PolynomialExpansion

Related Docs: class PolynomialExpansion | package filtering

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object PolynomialExpansion

Local polynomial expansion of a scalar field.

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@deprecated
Deprecated

use libcog.filters.spatial.QuadraticExpansion.apply() instead

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  4. def apply(input: libcog.ScalarField, applicability: libcog.Matrix): (libcog.MatrixField, libcog.VectorField)

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    Project a scalar field locally onto a 2nd-order polynomial approximation, represented by a matrix field + vector field + scalar field.

    Project a scalar field locally onto a 2nd-order polynomial approximation, represented by a matrix field + vector field + scalar field. The basis set consists of the following 2-dimensional functions:

    1, x, y, x*x, x*y, y*y.

    This is based on Gunnar Farneback's dissertation.

    input

    Scalar field to be projected onto polynomial expansion.

    returns

    (matrix field, vector field) of the expansion.

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