lsst::meas::extensions::photometryKron Namespace Reference

Namespaces
namespace	version

Classes
class	BadKronException
class	KronAperture
class	KronFluxAlgorithm
	A measurement algorithm that estimates flux using Kron photometry. More...
class	KronFluxControl
	C++ control object for Kron flux. More...

Functions
	PYBIND11_MODULE (photometryKron, mod)
template<typename ImageT>
std::pair< double, double >	photometer (ImageT const &image, afw::geom::ellipses::Ellipse const &aperture, double const maxSincRadius)
double	calculatePsfKronRadius (std::shared_ptr< afw::detection::Psf const > const &psf, geom::Point2D const &center, double smoothingSigma=0.0)
template std::shared_ptr< KronAperture >	KronAperture::determineRadius< afw::image::MaskedImage< float > > (afw::image::MaskedImage< float > const &, afw::geom::ellipses::Axes, geom::Point2D const &, KronFluxControl const &)
template std::pair< double, double >	KronAperture::measureFlux< afw::image::MaskedImage< float > > (afw::image::MaskedImage< float > const &, double const, double const) const

Variables
	KronFluxPlugin
	KronFluxForcedPlugin
	name
	Control
	executionOrder
	shouldApCorr
	needsMetadata

Function Documentation

calculatePsfKronRadius()

double lsst::meas::extensions::photometryKron::calculatePsfKronRadius	(	std::shared_ptr< afw::detection::Psf const > const &	psf,
		geom::Point2D const &	center,
		double	smoothingSigma = 0.0 )

Definition at line 339 of file KronPhotometry.cc.

{
    assert(psf);
    double const radius = psf->computeShape(center).getDeterminantRadius();
    // For a Gaussian N(0, sigma^2), the Kron radius is sqrt(pi/2)*sigma
    return ::sqrt(geom::PI/2)*::hypot(radius, std::max(0.0, smoothingSigma));
}

KronAperture::determineRadius< afw::image::MaskedImage< float > >()

template std::shared_ptr< KronAperture > lsst::meas::extensions::photometryKron::KronAperture::determineRadius< afw::image::MaskedImage< float > >	(	afw::image::MaskedImage< float > const &	,
		afw::geom::ellipses::Axes	,
		geom::Point2D const &	,
		KronFluxControl const &	)

KronAperture::measureFlux< afw::image::MaskedImage< float > >()

template std::pair< double, double > lsst::meas::extensions::photometryKron::KronAperture::measureFlux< afw::image::MaskedImage< float > >	(	afw::image::MaskedImage< float > const &	,
		double const	,
		double const	) const

photometer()

template<typename ImageT>

std::pair< double, double > lsst::meas::extensions::photometryKron::photometer	(	ImageT const &	image,
		afw::geom::ellipses::Ellipse const &	aperture,
		double const	maxSincRadius )

Definition at line 312 of file KronPhotometry.cc.

{
    afw::geom::ellipses::Axes const& axes = aperture.getCore();
    if (axes.getB() > maxSincRadius) {
        FootprintFlux<ImageT> fluxFunctor;
        auto spans = afw::geom::SpanSet::fromShape(aperture);
        spans->applyFunctor(
                fluxFunctor, *(image.getImage()), *(image.getVariance()));
        return std::make_pair(fluxFunctor.getSum(), ::sqrt(fluxFunctor.getSumVar()));
    }
    try {
        base::ApertureFluxResult fluxResult = base::ApertureFluxAlgorithm::computeSincFlux<float>(image, aperture);
        return std::make_pair(fluxResult.instFlux, fluxResult.instFluxErr);
    } catch(pex::exceptions::LengthError &e) {
        LSST_EXCEPT_ADD(e, (boost::format("Measuring Kron flux for object at (%.3f, %.3f);"
                                          " aperture radius %g,%g theta %g")
                            % aperture.getCenter().getX() % aperture.getCenter().getY()
                            % axes.getA() % axes.getB() % geom::radToDeg(axes.getTheta())).str());
        throw e;
    }
}

PYBIND11_MODULE()

lsst::meas::extensions::photometryKron::PYBIND11_MODULE	(	photometryKron	,
		mod	)

Definition at line 131 of file photometryKron.cc.

                                     {
    py::module::import("lsst.afw.geom");
    py::module::import("lsst.afw.image");
    py::module::import("lsst.afw.table");
    py::module::import("lsst.daf.base");
 
    declareKronFluxControl(mod);
    declareKronFluxAlgorithm(mod);
    declareKronAperture(mod);
}

Variable Documentation

Control

lsst.meas.extensions.photometryKron.Control

Definition at line 31 of file __init__.py.

executionOrder

lsst.meas.extensions.photometryKron.executionOrder

Definition at line 32 of file __init__.py.

KronFluxForcedPlugin

lsst.meas.extensions.photometryKron.KronFluxForcedPlugin

Definition at line 28 of file __init__.py.

KronFluxPlugin

lsst.meas.extensions.photometryKron.KronFluxPlugin

Definition at line 28 of file __init__.py.

name

lsst.meas.extensions.photometryKron.name

Definition at line 30 of file __init__.py.

needsMetadata

lsst.meas.extensions.photometryKron.needsMetadata

Definition at line 34 of file __init__.py.

shouldApCorr

lsst.meas.extensions.photometryKron.shouldApCorr

Definition at line 33 of file __init__.py.