lsst::jointcal::MagnitudeTransformSpatiallyInvariant Class Reference

Photometric offset independent of position, defined as -2.5 * log(flux / fluxMag0). More...

#include <PhotometryTransform.h>

Inheritance diagram for lsst::jointcal::MagnitudeTransformSpatiallyInvariant:

Public Member Functions
	MagnitudeTransformSpatiallyInvariant (double value=0)
double	transform (double x, double y, double mag) const override
	Return the transform of value at (x,y).
double	transformError (double x, double y, double value, double valueErr) const override
	Return the transformed valueErr at Point(x,y).
std::shared_ptr< PhotometryTransform >	clone () const override
	return a copy (allocated by new) of the transformation.
void	computeParameterDerivatives (double x, double y, double value, Eigen::Ref< Eigen::VectorXd > derivatives) const override
	Compute the derivatives with respect to the parameters (i.e.
void	print (std::ostream &out) const override
	Print the transform coefficients to stream.
std::size_t	getNpar () const override
	Return the number of parameters (used to compute chisq)
void	offsetParams (Eigen::VectorXd const &delta) override
	Offset the parameters by some (negative) amount during fitting.
Eigen::VectorXd	getParameters () const override
	Get a copy of the parameters of this model, in the same order as offsetParams.
double	transform (Point const &in, double value) const
	Return the transformed value at Point(x,y).
double	transformError (Point const &in, double value, double valueErr) const
	Return the transformed valueErr at Point(x,y).

Protected Member Functions
double	getValue () const

Detailed Description

Photometric offset independent of position, defined as -2.5 * log(flux / fluxMag0).

initialMagnitude + SpatiallyInvariantTransform -> correctedMagnitude

Definition at line 179 of file PhotometryTransform.h.

Constructor & Destructor Documentation

MagnitudeTransformSpatiallyInvariant()

lsst::jointcal::MagnitudeTransformSpatiallyInvariant::MagnitudeTransformSpatiallyInvariant ( double value = 0 )

inlineexplicit

Definition at line 181 of file PhotometryTransform.h.

            : PhotometryTransformSpatiallyInvariant(value) {}

Member Function Documentation

clone()

std::shared_ptr< PhotometryTransform > lsst::jointcal::MagnitudeTransformSpatiallyInvariant::clone ( ) const

inlineoverridevirtual

return a copy (allocated by new) of the transformation.

Implements lsst::jointcal::PhotometryTransform.

Definition at line 193 of file PhotometryTransform.h.

                                                              {
        return std::make_shared<MagnitudeTransformSpatiallyInvariant>(getValue());
    }

computeParameterDerivatives()

void lsst::jointcal::MagnitudeTransformSpatiallyInvariant::computeParameterDerivatives ( double x, double y, double value, Eigen::Ref< Eigen::VectorXd > derivatives ) const

inlineoverridevirtual

Compute the derivatives with respect to the parameters (i.e.

the coefficients).

Parameters

[in]	x	The x coordinate to compute at (in the appropriate units for this transform).
[in]	y	The y coordinate to compute at (in the appropriate units for this transform).
[in]	value	The instrument flux or magnitude to compute the derivative at.
[out]	derivatives	The computed derivatives, in the same order as the deltas in offsetParams.

Implements lsst::jointcal::PhotometryTransform.

Definition at line 198 of file PhotometryTransform.h.

                                                                                         {
        // the derivative of a spatially constant transform w.r.t. that value is 1.
        derivatives[0] = 1;
    }

getNpar()

std::size_t lsst::jointcal::PhotometryTransformSpatiallyInvariant::getNpar ( ) const

inlineoverridevirtualinherited

Return the number of parameters (used to compute chisq)

Implements lsst::jointcal::PhotometryTransform.

Definition at line 121 of file PhotometryTransform.h.

{ return 1; }

getParameters()

Eigen::VectorXd lsst::jointcal::PhotometryTransformSpatiallyInvariant::getParameters ( ) const

inlineoverridevirtualinherited

Get a copy of the parameters of this model, in the same order as offsetParams.

Implements lsst::jointcal::PhotometryTransform.

Definition at line 127 of file PhotometryTransform.h.

                                                 {
        Eigen::VectorXd parameters(1);
        parameters[0] = _value;
        return parameters;
    }

getValue()

double lsst::jointcal::PhotometryTransformSpatiallyInvariant::getValue ( ) const

inlineprotectedinherited

Definition at line 134 of file PhotometryTransform.h.

{ return _value; }

offsetParams()

void lsst::jointcal::PhotometryTransformSpatiallyInvariant::offsetParams ( Eigen::VectorXd const & delta )

inlineoverridevirtualinherited

Offset the parameters by some (negative) amount during fitting.

Equivalent to flatten(parameters) -= delta

Ordering of delta is the same as the ordering of the derivatives returned from computeParameterDerivatives.

Implements lsst::jointcal::PhotometryTransform.

Definition at line 124 of file PhotometryTransform.h.

{ _value -= delta[0]; };

print()

void lsst::jointcal::PhotometryTransformSpatiallyInvariant::print ( std::ostream & out ) const

inlineoverridevirtualinherited

Print the transform coefficients to stream.

Implements lsst::jointcal::PhotometryTransform.

Definition at line 116 of file PhotometryTransform.h.

                                               {
        out << "PhotometryTransformSpatiallyInvariant: " << std::setprecision(10) << _value;
    }

transform() [1/2]

double lsst::jointcal::MagnitudeTransformSpatiallyInvariant::transform ( double x, double y, double mag ) const

inlineoverridevirtual

Return the transform of value at (x,y).

Implements lsst::jointcal::PhotometryTransform.

Definition at line 185 of file PhotometryTransform.h.

{ return mag + getValue(); }

transform() [2/2]

double lsst::jointcal::PhotometryTransform::transform ( Point const & in, double value ) const

inlineinherited

Return the transformed value at Point(x,y).

Definition at line 58 of file PhotometryTransform.h.

{ return transform(in.x, in.y, value); }

transformError() [1/2]

double lsst::jointcal::MagnitudeTransformSpatiallyInvariant::transformError ( double x, double y, double value, double valueErr ) const

inlineoverridevirtual

Return the transformed valueErr at Point(x,y).

Implements lsst::jointcal::PhotometryTransform.

Definition at line 188 of file PhotometryTransform.h.

                                                                                            {
        return valueErr;
    }

transformError() [2/2]

double lsst::jointcal::PhotometryTransform::transformError ( Point const & in, double value, double valueErr ) const

inlineinherited

Return the transformed valueErr at Point(x,y).

Definition at line 64 of file PhotometryTransform.h.

                                                                                {
        return transformError(in.x, in.y, value, valueErr);
    }

---

The documentation for this class was generated from the following file:

• /j/snowflake/release/lsstsw/stack/lsst-scipipe-12.0.0/Linux/jointcal/g29ae962dfc+1eb4aece83/include/lsst/jointcal/PhotometryTransform.h