Function lsst::afw::geom::makeRadialTransform(std::vector<double> const&)

Function Documentation

std::shared_ptr<TransformPoint2ToPoint2> lsst::afw::geom::makeRadialTransform(std::vector<double> const &coeffs)

A purely radial polynomial distortion.

The Transform transforms an input \(x\) to

\[ \frac{x}{r} \sum_{i=1}^{N} \mathrm{coeffs[i]} \ r^i \]

where \(r\) is the magnitude of \(x\).

Return

the radial distortion represented by coeffs. The Transform shall have an inverse, which may be approximate.

Parameters

• coeffs: radial polynomial coefficients. May be an empty vector to represent the identity transformation; otherwise must have size > 1, coeffs[0] = 0, and coeffs[1] 0.

Exceptions

• pex::exceptions::InvalidParameterError: Thrown if coeffs does not have the required format. Provides basic exception safety.